PRACTICAL PROBLEM REFRESHER Flashcards
(174 cards)
1
Q
Coefficient of roughness of Cast Iron (New)
A. 0.01
B. 0.016
C. 0.009
D. 0.012
A
Correct answer: 0.012
2
Q
Coefficient of roughness of Galvanized Iron
A
0.016
3
Q
Coefficient of roughness of Plastic
A
0.009
4
Q
Coefficient of roughness of Glass
A
0.01
5
Q
What is the practical method of repairing or correcting leak of plastic pipe?
A. cut and provide bushing
B. insert additional bigger pipe
C. cut and insert coupling
D. replace the pipe
A
Correct answer: cut and insert coupling
Additional info:
Other possible remedies: Fiberglass resin tape, Epoxy putty, rubber and silicone repair tape, etc.
6
Q
To maintain water pressure in all floors of a building/structure, what should be the design of the tank?
A. A suitable pressure switch shall stop the pump when the cut-in pressure is attained.
B. The pump is installed before the underground water cistern.
C. The pneumatic tank shall be designed for twice the maximum total dynamic pressure required.
D. The pneumatic tank must have a corrosion-resistant material to avoid cavitation.
A
Correct answer: The Pneumatic tank shall be designed for twice the maximum total dynamic pressure required.
Source: PD 1096
7
Q
an unfired pressure vessel, initially full of air, into which water from mains is pumped.
A
Pneumatic tank
8
Q
There should be tests for atmospheric hazards such as low oxygen, hazardous fumes, and toxic gases when workers are more than _____ deep.
A. 10 feet
B. 5 feet
C. 3 feet
D. 4 feet
A
Correct answer: 4 feet
Source: ronmeyerexcavating.com
9
Q
How many turns does it take to operate a 4” double-disk valve?
A. 16
B. 15.5
C. 14.5
D. 16.5
A
Correct answer:14.5
The AWWA operating formula for opening/closing a gate valve is 3 times the nominal valve size plus 2 or 3 turns of the operating nut. For example, a 6-inch gate valve would require 6 x 3 = 18 turns plus 2 or 3 turns, for a total of 20 to 21 turns.
10
Q
It is a scaled view that shows the shape and size of the exterior walls and the roof of the building.
A. Detail Drawing
B. Plot Plan
C. Exterior Elevation Drawing
D. Section Drawing
A
Correct answer: Exterior Elevation Drawing
Additional info:
- Section drawing: shows a cut-through of the building
- Detail drawing: presents design and building components in blow-up
- Plot Plan: shows site features, buildings
11
Q
Slaughtering room and “dressing room” drains shall be equipped with approved separators. What must the separators be capable of separating?
A. bottled fluids
B. feathers and entrails
C. blood and oils
D. scales and innards
A
Correct answer: feathers and entrails
Source: International Plumbing Code
12
Q
What material is applied under the flange for installation onto a lavatory and/or sink?
A. Pipe joint compound
B. Rubber gasket
C. Plumber’s putty
D. Rubber washer
A
Correct answer: Plumber’s putty
Source: various websites
13
Q
soft, pliable sealing compound that is used to make watertight seals around faucets, drains, and other plumbing parts.
A
Plumber’s putty
14
Q
The recovery rate of a water heater is also referred to as ____.
A. Gallons per hour
B. Milligrams per Liter
C. Flow rate
D. Fluid Velocity
A
Correct answer: Gallons per hour
Source: georgebrazilplumbingelectrical.com
Additional info:
A water heater’s “recovery time” is the amount of hot water (in gallons) a tank water heater can provide in just one hour after being completely drained. It refers to how fast a water heater can heat water.
15
Q
The allowable tensile stress of a certain pipe is 800psi. It is to be used for cold water supply with working pressure of 60psi. What schedule of the pipe should you specify?
A. 20
B. 40
C. 60
D. 80
A
Correct answer: 80
Schedule = (1000(Pressure))/ Stress
(1000(60))/800 = 75
or Schedule 80
16
Q
A practical and commonly used joint for larger size valves or for higher pressure applications.
A. Bolted Bonnet joint
B. Screwed union-ring bonnet
C. Screwed-in bonnet
D. Welded bonnet
A
Correct answer: Bolted bonnet joint
Source: ASPE Volume 4
17
Q
simplest and least expensive construction, frequently used on bronze gate, globe, and angle valves and recommended where frequent dismantling is not needed
A. Bolted Bonnet joint
B. Screwed union-ring bonnet
C. Screwed-in bonnet
D. Welded bonnet
A
Screwed-in bonnet
18
Q
convenient where valves need frequent inspection or cleaning—also for quick renewal or changeover of the disc in composition disc valves
A. Bolted Bonnet joint
B. Screwed union-ring bonnet
C. Screwed-in bonnet
D. Welded bonnet
A
Screwed union-ring bonnet
19
Q
A method of joining MDPE, HDPE and other plastic pipes using special fittings that have built-in electric heating elements which are used to weld the joint together.
A. Heat-shrink joint
B. Wire-wound connection
C. Fusion Weld
D. Electro Fusion
A
Correct answer: Electro Fusion
20
Q
a process that uses heat to join or fuse two or more materials by heating them to melting point
A. Heat-shrink joint
B. Wire-wound connection
C. Fusion Weld
D. Electro Fusion
A
Fusion Weld
21
Q
fully waterproof and ideal for use in boreholes and water wells
A. Heat-shrink joint
B. Wire-wound connection
C. Fusion Weld
D. Electro Fusion
A
Heat-shrink joint
22
Q
type of passive component in which metal wires are used to reduce or restrict the flow of electric current.
A. Heat-shrink joint
B. Wire-wound connection
C. Fusion Weld
D. Electro Fusion
A
Wire-wound connection: Wirewound resistors
23
Q
What is the minimum supply pipe of a GI pipe?
A. 15 mm
B. 10 mm
C. 20 mm
D. 25 mm
A
Correct answer: 15 mm (Nominal Diameter)
Source: Pipe Brand Brochures
24
Q
Standard GI Pipe length
A
6 meters
25
Which of the following joint types is commonly used on galvanized steel pipes?
A. Solvent Cement joint
B. Screwed joint
C. Welded joint
D. Flange joint
Correct answer: Screwed joint
Source: RNPCP, Chapter 13; PDE by Max Fajardo
26
A tank located above or integral with water closet, urinal or similar fixtures for flushing or removing excrements in the fixture.
A. Water Tank
B. Flush Tank
C. Cistern
D. Flushometer Tank
Correct answer: Flush Tank
Source: RNPCP, Chapter 2
27
integrated within an air accumulator vessel which is designed to discharge a predetermined quantity of water into fixtures for flushing purposes
A. Water Tank
B. Flush Tank
C. Cistern
D. Flushometer Tank
Flushometer tank
28
a device located at the bottom of the tank for the purpose of flushing water closet and similar fixtures
A. Water Tank
B. Flush Tank
C. flushvalve
D. Flushometer Tank
Flush Valve
29
a container for storing water, for many applications, drinking water, irrigation, fire suppression, farming, both for plants and livestock, chemical manufacturing, food preparation as well as many other uses.
A. Water Tank
B. Flush Tank
C. Cistern
D. Flushometer Tank
Water Tank
30
Pilots and burners of gas-fired water heaters (except sealed combustion chambers) in residential garages shall be _______ above the floor level.
A. 6"
B. 18"
C. 12"
D. 24"
Correct answer: 18 inches
Source: lochinvar.com
31
What type of valve is typically used in gas appliances?
A. pressure-reducing valve
B. butterfly valve
C. gas cock
D. ball valve
Correct answer: gas cock
32
designed to reduce a higher unregulated inlet pressure to a constant, reduced downstream
A. pressure-reducing valve
B. butterfly valve
C. gas cock
D. ball valve
Pressure-reducing valve
33
regulates flow by starting, slowing, or stopping media
A. pressure-reducing valve
B. butterfly valve
C. gas cock
D. ball valve
Butterfly valve
34
typical configuration of a gas cock
A. pressure-reducing valve
B. butterfly valve
C. gas cock
D. ball valve
Ball Valve
35
Single wall metal vent connectors, shall be provided with clearances from combustible material of not less than ______.
A. 5"
B. 6"
C. 3"
D. 4"
Correct answer: 6"
Source: International Residential Code
36
______ is an effective heating medium and is adaptable to almost any type of building.
A. Steam
B. Oil
C. Water
D. Electricity
Correct answer: Steam
Source: Audel
37
Approximate capacity of 1" pipe in US gallons per foot is _____.
A. 0.0415
B. 0.0402
C. 0.0408
D. 0.0416
0.0408
38
The following are the washerless faucets, except ______.
A. Ceramic-disc faucet
B. Cartridge faucet
C. Compression faucet
D. Ball faucet
Correct answer: Compression faucet
Source: thespruce.com
39
First washerless faucet with interior slotted ball assembly controlling the flow of hot and cold water, single handle
A. Ceramic-disc faucet
B. Cartridge faucet
C. Compression faucet
D. Ball faucet
Ball faucet
40
Interior cartridge moves to regulate water flow, single or double handle. Washerless.
A. Ceramic-disc faucet
B. Cartridge faucet
C. Compression faucet
D. Ball faucet
Cartridge faucet
41
Handle moves ceramic disks up and down to regulate flow, single handle. Washerless
A. Ceramic-disc faucet
B. Cartridge faucet
C. Compression faucet
D. Ball faucet
Ceramic-disc faucet
42
If water closet remains clogged after using an auger, what will be the next step?
A. Remove the water closet to inspect
B. Flush with hot and soapy water
C. Use accordion plunger
D. Pour chemical drain cleaner
Correct answer: Remove the water closet to inspect
43
What is the most appropriate use for offset pipe wrench?
A. to extract recessed nipples in walls
B. to change shower valves
C. to turn overhead pipework in restricted spaces
D. to grip and turn nuts and bolts in confined space
Correct answer: to turn overhead pipework in restricted spaces
Additional info:
- Offset Pipe Wrench: Features a jaw opening parallel to the handle and a narrower hook jaw head. Provides easy entry into tight spots.
44
Features a jaw opening parallel to the handle and a narrower hook jaw head. Provides easy entry into tight spots.
Offset Pipe Wrench
45
Which of the following is the usual solution in repairing leaks at the base of disc, cartridge and ball type faucets?
A. replace valve seat
B. put lubricant
C. replace o-ring
D. replace washer
Correct answer: replace o-ring
Additional info: cartridge and ball faucets are washerless
46
What is the suitable gasket material for gas piping?
A. metallic
B. sheet rubber or asbestos sheet packing
C. leather or asbestos composition
D. rubber or asbestos composition
Correct answer: leather or asbestos composition
Source: Audel
Additional info:
- Cold-water piping: Sheet rubber or asbestos sheet packing. (Asbestos is not permitted in any form in some local codes.)
- Hot-water lines: Rubber or asbestos composition.
- Gas piping: Leather or asbestos composition.
- Oil lines: Metallic or, where permitted, asbestos composition.
- Gasoline conduction: Metallic.
47
Calculate the gradient required for a 100 mm diameter drain to run half-full at an average velocity flow of 1.2 m/sec. (Take C=55).
A. 1 in 65.5 m would be required
B. 1 in 62.5 m would be required.
C. 1 in 50.5 m would be required.
D. 1 in 52.5 m would be required.
1 in 52.5 m would be required.
additional info
LOOKS FAM NALANG HAHA
formula
V= C √r*s
V= velocity
C= chezzy coefficient
R= hydraulic radius (m)
s= slope in m/m
48
All plumbing fixtures listed below are included under the definition of a Plumbing Unit except _____.
A. water meter
B. water closet
C. urinal
D. lavatory
Correct answer: Urinal
Source: RNPCP, Chapter 2
49
What material should the fixed manhole inspection ladders be made of?
A. Wrought Iron
B. Aluminum
C. Galvanized Steel
D. Steel
Correct answer: Galvanized Steel
Source: laddersandaccess.co.uk; ladderstore.com
Additional info:
Galvanized steel shaft ladders are perfect for maintenance and repair works in all types of shaft systems including water treatment plants, manholes and sewage plants.
50
When plastic pipe is joined with cast-iron pipe, which of the following types of joints is acceptable?
A. Caulked
B. Solvent weld
C. Threaded
D. Mechanical
Correct answer: mechanical
Additional info:
- when connecting plastic pipe to other types of piping, use only approved types of fittings and adapters designed for the specified transition intended
51
Shower seat should be built of the following except _____.
A. spring-loaded
B. hinged pull-down
C. removable
D. all are acceptable
Correct answer: Spring-loaded
Source: UN Enable
52
The pressure existing without any flow motion
A. Residual Pressure
B. Atmospheric Pressure
C. Static Pressure
D. Absolute Pressure
Correct answer: Static Pressure
Source: RNPCP, Chapter 2
53
the sum of gauge pressure and atmospheric pressure
A. Residual Pressure
B. Atmospheric Pressure
C. Static Pressure
D. Absolute Pressure
Absolute Pressure
54
the pressure available at the fixture or water outlet
A. Residual Pressure
B. Atmospheric Pressure
C. Static Pressure
D. Absolute Pressure
Residual Pressure
55
the pressure within the atmosphere of Earth
A. Residual Pressure
B. Atmospheric Pressure
C. Static Pressure
D. Absolute Pressure
Atmospheric Pressure
56
For searching for cable which is broken or lost in line.
A. Drop Head Auger
B. Retrieving Auger
C. Hook Auger
D. Straight Auger
Correct answer: Retrieving Auger
Source: Ridgid
57
For cleaning back to back mounted fixtures e.g., sinks where cable needs to be led into down pipe
A. Drop Head Auger
B. Retrieving Auger
C. Hook Auger
D. Straight Auger
Drop Head Auger
58
For heavy and dense root stoppages in pipes that require hooking and breaking up
A. Drop Head Auger
B. Retrieving Auger
C. Hook Auger
D. Straight Auger
Hook Auger
59
For use in exploring and breaking up stoppages or returning sample to surface to determine the correct tool
A. Drop Head Auger
B. Retrieving Auger
C. Hook Auger
D. Straight Auger
Straight Auger
60
Minimum supply pipe for lavatory using PPR PN 20 is _____.
A. 15 mm dia.
B. 25 mm dia.
C. 20 mm dia.
D. 32 mm dia.
Correct answer: 20 mm dia.
Additional info:
- Internal diameter of 20 mm pipe dimension is 13 mm
61
Which of the following fixture connections is a prohibited practice?
A. A bar sink draining to an air gap
B. A drinking fountain with indirect drain
C. A water closet connected to a 4" trap
D. Installing trap seal primer on floor drains
Correct answer: A water closet connected to a 4" trap
Additional info:
- Double-trapping is not a recommended practice.
62
What is the maximum length of pipe for size 150 mmØ PVC that could freely drain? Assume flow is equals to 15.9 liters per second, 0.9 m/sec velocity and chezy constant at 55. Consider full bore for hydraulic mean.
A. 160 m
B. 140 m
C. 150 m
D. 135 m
140 m
Looks fam nalang haha
63
The following ways are to prevent hazards while using power tools, except for one:
A. Using heavy rubber grips when using heavy jackhammers
B. Avoiding chisels and wedges with mushroomed heads
C. Not keeping hold on the switch button while carrying a plugged-in tool
D. Using wrench with sprung jaws so that the wrench will not slip
Correct answer: Using wrench with sprung jaws so that the wrench will not slip
Source: OSHA
Additional info:
- Wrench with sprung jaws shall not be used as slippage may occur
64
The minimum pressure that should be maintained for flushometer valves
A. 15 psi
B. 8 psi
C. 10 psi
D. 0.434 psi
Correct answer: 15 psi
Source: RNPCP, Appendix A
Additional info:
- 8 psi: maintaining pressure for flush tank
65
The minimum pressure that should be maintained for flush tank
A. 15 psi
B. 8 psi
C. 10 psi
D. 0.434 psi
8 psi
66
It produces high head, low flow rate and suitable for high viscosity application.
A. piston pump
B. reciprocating pump
C. dynamic
D. positive displacement
Correct answer: Positive displacement
Additional info:
- reciprocating pump and piston pump are types of positive displacement pump
- dynamic pumps are suitable for low-viscious fluids
67
suitable for low-viscious fluids
dynamic pumps
68
No more than _____ of flammable liquids shall be stored in a room outside of an approved storage cabinet.
A. 25 gallons
B. 15 gallons
C. 30 gallons
D. 50 gallons
Correct answer: 25 gallons
Source: OSHA
69
What is a way to reduce water hammer?
A. Buy a hammer made with wood
B. Put noise reduction insulation to absorb noise that will be created by the pipes
C. Install additional vent
D. Install additional length of pipe on top of riser or fixture supply to give air
Correct answer: Install additional length of pipe on top of riser or fixture supply to give air
Source: pmengineer.com; latimes.com
70
Where should the in-tub seat be located?
A. the side where a companion can freely assist
B. the side near the entrance
C. the side near the drain
D. the side near the controls
Correct answer: the side near the controls
Additional info: An in-tub seat or a seat at the same height of the tub should be provided at the head side of the tub
71
When designing overhead water tanks, which rule applies when determining the size and capacity of cistern compared to the overhead water tank especially when using large capacity overhead tanks.
A. No cistern is needed for large capacity overhead tanks.
B. Cistern is smaller than overhead water tank.
C. Cistern is bigger than overhead water tank.
D. Overhead is the same as cistern.
Correct answer: Cistern is bigger than overhead water tank.
Additional info:
- Cistern: an artificial reservoir (such as an underground tank) for storing liquids and especially water (such as rainwater)
72
To ensure a leak-proof pop-up drain in a hot tub, what should be used?
A. rubber gasket
B. silicone gasket
C. escutcheon
D. flat washer
Correct answer: silicone gasket
Additional info:
- Washer is more associated in the distribution of mechanical load, under a nut
- Silicone gasket is more heat-resistant than rubber silicone
- escutcheon is used to cover a gap or hole, not used for leak-proofing
73
Pipe sizes greater than _____shall have restraints for drain pipes at all changes in directions and at all changes in diameter greater than two pipe size.
A. 6"
B. 4"
C. 3"
D. 8"
Correct answer: 4"
Source: International Plumbing Code
74
What pipe cutter will you use for PVC if you wish to have clean and square cut?
A. coping saw
B. ratchet cutter
C. hacksaw
D. hinged cutter
Correct answer: ratchet cutter
Additional info:
- hacksaw is also fit for large and rigid PVC pipes, but it leaves a rougher, less square cut
- hinged cutter is best for steel and cast iron pipe
- coping saw is used to cut curves and intricate shapes
75
cutter is best for steel and cast iron pipe
A. coping saw
B. ratchet cutter
C. hacksaw
D. hinged cutter
hinged cutter
76
saw is used to cut curves and intricate shapes
A. coping saw
B. ratchet cutter
C. hacksaw
D. hinged cutter
coping saw
77
Electric power tools with abrasive cutting wheels should be properly _____. User shall wear eye protection and gloves.
A. sealed
B. grounded
C. oiled
D. reamed
Correct answer: grounded
Additional info: (from safetycompany.com- Electric power tools need to be grounded for safety purposes. Excess current or "overcurrent" can cause serious injury or even death. If there's an electrical fault, excess current may travel from the wall outlet to the power tool. )
78
Which of the following is a primary advantage of a sovent system compared to the traditional two-line drainage system?
A. better resistance to pressure surges
B. reduced material cost
C. enhanced aesthetic
D. improved drainage flow rates
Correct answer: reduced material cost
Additional info:
- Sovent system is a type of one-line drainage system that combines the functions of a vent and a drain in a single pipe
79
Which of the following is true about CTS (Copper Tube Size)?
A. ID of Type K is larger than ID of Type L.
B. OD of CTS is always 1/8" larger than ID.
C. ID of Type M is smaller than ID of Type L.
D. Type K with nominal size of 2 1/2" has an OD of 2 5/8".
Correct answer: Type K with nominal size of 2 1/2" has an OD of 2 5/8".
Source: shanghaimetal.com
Additional info:
- OD is always 1/8" larger than the nominal size, not the interior diameter.
- ID is dependent upon the type of Copper Tube.
80
What might be the reason why a hacksaw keeps breaking?
A. the blade has lost its sharpness
B. too much pressure is applied on the return stroke
C. not lubricating the blade
D. using lower tpi for faster cut
Correct answer: too much pressure is applied on the return stroke
Additional info:
- a hacksaw is designed to cut using forward strokes
81
A type of vent used to provide air circulation to a single fixture trap.
A. unit vent
B. circuit vent
C. back vent
D. branch vent
Correct answer: back vent
Source: RNPCP, Chapter 2
Additional info:
- Unit Vent: an arrangement of venting so installed that one vent pipe will serve two (2) traps.
- Circuit Vent: a group vent pipe which starts in front of the extreme fixture connection on a horizontal branch and connects to the vent stack.
- Branch Vent: a horizontal vent connecting one or more individual vertical back vents with the vent stack or stack vent.
82
an arrangement of venting so installed that one vent pipe will serve two (2) traps.
Unit Vent
83
a group vent pipe which starts in front of the extreme fixture connection on a horizontal branch and connects to the vent stack.
A. unit vent
B. circuit vent
C. back vent
D. branch vent
Circuit Vent
84
a horizontal vent connecting one or more individual vertical back vents with the vent stack or stack vent.
A. unit vent
B. circuit vent
C. back vent
D. branch vent
Branch Vent
85
What makes Stillson wrench a good tool for pipes?
A. its jaws are spring-loaded
B. the movable upper jaw can accommodate different pipe sizes
C. the set torque level can secure pipes
D. the smooth jaws secure the nuts and bolts
Correct answer: the movable upper jaw can accommodate different pipe sizes
Additional info:
- Stillson wrench has serrated (toothed) jaws meant to grip various pipe sizes
86
What do you call that storage suitable to preserve and care plumbing tools properly?
A. Tool Chute
B. Tool back
C. Tool kit
D. Tool Chest
Correct answer: Tool Chest
Additional info:
- Tool Kit: Portable small storage for tools
87
Galvanized steel pipes are generally measured by its _____.
A. Number of threads
B. Outside diameter
C. Developed length
D. Inside diameter
Correct answer: inside diameter
Source: PDE by Max Fajardo
88
What is the mounting height of bidet to be used by a person with disability?
A. 0.35 to 0.40 m
B. 0.40 to 0.45 m
C. 0.45 to 0.50 m
D. 0.50 to 0.55 m
Correct answer: 0.45 to 0.5m
Source: un.org; sanswiss.cz
89
What is the name of the process in which steel and wrought iron pipe rust?
A. tuberculation
B. sand blast
C. percolation
D. electrolysis
Correct: Tuberculation
Additional info:
- Electrolysis: splits hydrogen and oxygen gas killing pathogens at the same time
- sand blast: process of smoothing and cleaning a hard surface by forcing solid particles across that surface at high speeds using compressed air
- Tuberculation: the development or formation of small mounds of corrosion products (rust) on the inside of iron pipe.
- Percolation: the process by which water moves downward through the soil under gravitational forces
90
splits hydrogen and oxygen gas killing pathogens at the same time
A. tuberculation
B. sand blast
C. percolation
D. electrolysis
Electrolysis
91
process of smoothing and cleaning a hard surface by forcing solid particles across that surface at high speeds using compressed air
A. tuberculation
B. sand blast
C. percolation
D. electrolysis
sand blast
92
the development or formation of small mounds of corrosion products (rust) on the inside of iron pipe.
Tuberculation
93
the process by which water moves downward through the soil under gravitational forces
A. tuberculation
B. sand blast
C. percolation
D. electrolysis
Percolation
94
When the shower head does not spray water evenly, the most probable cause is _____.
A. defective shower riser
B. mineral salts clog up the shower head orifice
C. defective shower arm
D. uneven water pressure
Correct answer: mineral salts clog up the shower head orifice
Additional info:
One of the reasons mineral buildup and calcium deposits happen is hard water. Soap scum and other gunk, like mold and mildew, can further restrict the water flow.
95
In a building with a cistern and pump at the ground and overhead water tank located at the deck, using gravity-feed water supply from the tank to the fixtures, where would you install the hydropneumatic tank?
A. at roof deck
B. above the overhead water tank
C. at the ground floor
D. at mid height of building
Correct answer: at the ground floor
96
There are several reasons why soil stacks are not allowed in columns. Which is not the reason?
A. Cracks and leaks cannot be detected
B. The size of the columns will be larger
C. The Gas emitted will deteriorate concrete
D. Pipes will interfere with reinforcing Bars
Correct answer: The gas emitted will deteriorate the concrete
Additional info:
- The gas from sewage is not the most significant reason as to why soil stacks are prohibited in the column.
97
A rigid, chemically resistant form of PVC used for pipework, window frames, and other structures.
A. PB
B. PPR
C. UPVC
D. PE
Correct answer: UPVC
Source: fenesta.com
Additional info:
- PPR: Also known as Polypropylene Random Copolymer, PPR pipe is a cylindrical and rigid pipe made from PPR.
- PE: Polyethylene; black; circular shaped denoted by O.D; it cannot be used for hot-water systems.
- PB: Polybutylene; black, oval shaped denoted by O.D.; used as water service connection from main to meter
98
The size of the standpipe shall have a diameter of at least 4 inches in buildings in which the highest outlet is _____ above the fire service connection.
A. more than 23 meters
B. less than 23 meters
C. 23 meters or more
D. 23 meters or less
Correct answer: 23 meters or less
Source: RA 9514
- if highest outlet is 23 m above the fire service connection: 4" standpipe diameter
- if highest outlet is higher than 23 m above the fire service connection: 6"standpipe diameter
99
A rectangular channel with depth of 300 mm and a width of 450mm has average flow velocity of 0.8 m/sec and C = 55. Calculate the gradient
A. 1:750 m is required
B. 1:650 m is required
C. 1:608 m is required
D. 1:708 m is required
1:608 m is required
100
What is the recommended faucet for persons with disabilities?
A. Single lever faucet
B. Quarter-turn valve
C. Compression-type faucet
D. Knob-style faucet
Correct answer: single lever faucet
Source: ADAcentral.com
Additional info: Mechanisms such as faucets, knobs, valves, etc, that require patron use, must be workable with just one hand. Although not ADA required, many people recommend that faucets be lever-operated, push, touch, or electronically controlled. It’s better to avoid having to tightly grasp, pinch, or twist the wrist.
101
The wetted perimeter and cross-sectional area of a channel is 5 m and 9 sq. m respectively. What is the hydraulic radius of the channel?
A. 0.56 m
B. 1.27 m
C. 2.10 m
D. 1.80 m
1.80 m
Formula
R=A/P
R= Hydraulic radius
A= Area
P= Perimeter
102
This type of vent is commonly used in beauty parlor, barber shop, dental clinic, and operating room.
A. Utility Vent
B. Local vent
C. Relief Vent
D. Looped Vent
Correct answer: Looped Vent
Source: PDE by Max Fajardo
Additional info:
- Utility vent: a type of ventilation component commonly found on the exterior of buildings, usually on the roof or walls.
- Local Vent: a pipe or shaft to convey foul air from a plumbing fixture
or a room to the outer air.
- Relief Vent: a vertical vent line, the primary function of which is to provide additional circulation of air between the drainage and vent systems
103
a type of ventilation component commonly found on the exterior of buildings, usually on the roof or walls.
A. Utility Vent
B. Local vent
C. Relief Vent
D. Looped Vent
Utility vent
104
a pipe or shaft to convey foul air from a plumbing fixture
or a room to the outer air.
A. Utility Vent
B. Local vent
C. Relief Vent
D. Looped Vent
Local Vent
105
a vertical vent line, the primary function of which is to provide additional circulation of air between the drainage and vent systems
A. Utility Vent
B. Local vent
C. Relief Vent
D. Looped Vent
Relief Vent
106
Which of the following has the least impact on the curing time of solvent cement?
A. Temperature
B. Installation orientation
C. Pipe size
D. Pipe wall thickness
Correct answer: Installation orientation
Additional info:
- Curing time of solvent cement is not dependent on the position, whether the pipe is vertical or horizontal
107
What is installed in an area drain to facilitate easier cleaning?
A. running trap
B. valve
C. cleanout
D. catch basin
Correct answer: cleanout
Additional info:
- Cleanout serves as an access for maintenance, cleaning, and removal of blockages
- Running trap is installed to avoid freezing of the area drain pipe
- Catch basin filters out debris before it enters the drain
- Valve controls the flow of water
108
What is the allowable fall per foot for a 4" pipe and larger due to impractical depth?
A. 5/8" per foot
B. 1/4" per foot
C. 1/2" per foot
D. 1/8" per foot
Correct answer: 1/8"
Source: RNPCP, Chapter 12
109
A kind of plastic pipe which has excellent chemical, crush and fire resistance, high impact and tensile strength and is nontoxic; used for hot and cold water application.
A. polyvinyl chloride
B. chlorinated polyvinyl chloride
C. unplasticized polyvinyl chloride
D. polypropylene
Correct answer: chlorinated polyvinyl chloride
Source: rockys.com
Additional info:
- PVC: excellent chemical resistance, good crush resistance and impact strength, fire resistant (self-extinguishing)
- Polypropylene: excellent chemical resistance, resistant to sulphur-bearing compounds, lightweight, good tensile strength and saltwater resistance
- unplasticized polyvinyl chloride: used for the majority of plastic pipes in the world, as it is incredibly resistant to chemical erosion and has smoother inner walls that help to encourage water flow
110
excellent chemical resistance, good crush resistance and impact strength, fire resistant (self-extinguishing)
A. polyvinyl chloride
B. chlorinated polyvinyl chloride
C. unplasticized polyvinyl chloride
D. polypropylene
PVC
111
excellent chemical resistance, resistant to sulphur-bearing compounds, lightweight, good tensile strength and saltwater resistance
A. polyvinyl chloride
B. chlorinated polyvinyl chloride
C. unplasticized polyvinyl chloride
D. polypropylene
Polypropylene
112
used for the majority of plastic pipes in the world, as it is incredibly resistant to chemical erosion and has smoother inner walls that help to encourage water flow
A. polyvinyl chloride
B. chlorinated polyvinyl chloride
C. unplasticized polyvinyl chloride
D. polypropylene
unplasticized polyvinyl chloride
113
Which component is designed to connect a body harness to the anchorage point?
A. Anchorage connector
B. Lanyard
C. Self-retracting lifeline
D. Deceleration device
Correct answer: Lanyard
Additional info:
- Lanyard is a sample of Connector
- Anchorage Connector is a point of connection to any anchorage (beams, girders, etc). Samples are steel plate, bolt connector, etc.
- Self-retracting lifeline is a deceleration device at the same time connector
- Deceleration device is any mechanism that serves to dissipate energy during a fall.
114
a point of connection to any anchorage (beams, girders, etc). Samples are steel plate, bolt connector, etc.
A. Anchorage connector
B. Lanyard
C. Self-retracting lifeline
D. Deceleration device
Anchorage Connector
115
is a deceleration device at the same time connector
A. Anchorage connector
B. Lanyard
C. Self-retracting lifeline
D. Deceleration device
Self-retracting lifeline
116
is any mechanism that serves to dissipate energy during a fall.
A. Anchorage connector
B. Lanyard
C. Self-retracting lifeline
D. Deceleration device
Deceleration device
117
A kind of fitting used to connect sections of pipe in straight run or riser. Both ends are internally threaded.
A. nipple
B. socket
C. face bushing
D. hex bushing
Correct answer: Socket
Additional info:
- hex bushing: used to reduce the size of female threads from a larger to a smaller diameter
- nipple: a fitting consisting of a short piece of pipe, usually provided with a male pipe thread at each end
- face bushing: a fitting, consisting of a short piece of pipe, usually provided with a male pipe thread at each end,
118
used to reduce the size of female threads from a larger to a smaller diameter (has nut
A. nipple
B. socket
C. face bushing
D. hex bushing
hex bushing
119
a fitting consisting of a short piece of pipe, usually provided with a male pipe thread at each end
A. nipple
B. socket
C. face bushing
D. hex bushing
nipple
120
a fitting, consisting of a short piece of pipe, It typically has a male thread(externally) on one end and a female(internally) thread on the other, enabling a connection to be made in a straight line.
A. nipple
B. socket
C. face bushing
D. hex bushing
face bushing
121
When using compression fittings to connect plastic to copper pipe, _____ is crucial.
A. deburring of pipe
B. heating of the pipes prior to the jointing
C. application of teflon tape
D. usage of solvent cement
Correct answer: deburring of pipe
Additional info:
- A pipe that is not deburred can lead to leaks.
122
The following can be a cause for loss of water seal in traps except for _____.
A. Capillary Action
B. Oscillation
C. Vacuum
D. Evaporation
Correct answer : Vacuum
Additional info:
- Oscillation- too much air from wind outside the house could be getting into the pipes and may bounce the water out of the bowl.
- Evaporation- Overly dry air conditions can cause the water in your plumbing trap to evaporate.
- Capillary Action- If something is stuck inside of the pipe and is wicking or absorbing the water from the toilet, capillary action could be to blame.
123
This method for the treatment of organic wastes is self-contained. It uses no water.
A. Biological Compost Room
B. Microphor Flush Toilet
C. Mullbank Ecolet Room
D. Inclining Compost Room
Correct answer: Inclining Compost Room (or Clivus Multrum)
Source: Salvan Architectural Utilities 1
Additional info:
- Biological Compost Toilet or Mullbank Toilet: An aesthetically acceptable toilet that does not use water at all.
- Microphor Flush Toilet: Reduces the volume of sewage produced. This also uses less water.
124
An aesthetically acceptable toilet that does not use water at all.
A. Biological Compost Room
B. Microphor Flush Toilet
C. Mullbank Ecolet Room
D. Inclining Compost Room
Biological Compost Toilet or Mullbank Toilet
125
Reduces the volume of sewage produced. This also uses less water.
A. Biological Compost Room
B. Microphor Flush Toilet
C. Mullbank Ecolet Room
D. Inclining Compost Room
Microphor Flush Toilet
126
This type of water heater offers extremely high efficiency. It moves existing heat to warm up water instead of creating new heat.
A. Heat Pump Water Heater
B. Indirect Water Heater
C. Tankless Water Heater
D. Solar Water Heater
Correct answer: Heat Pump Water Heater
Source: uswhpro.com
Additional info:
- Solar water heater: collects energy from the sun to warm water
- Indirect water heater: uses heat from an existing boiler or furnace to heat water running through a heat exchanger inside of the water heater.
- Tankless water heater: a.k.a. instantaneous, continuous flow, on-demand water heater, are water heaters that instantly heat water as it flows through the device, and do not retain any water heater internally except for what's in the heat exchanger coils.
127
collects energy from the sun to warm water
A. Heat Pump Water Heater
B. Indirect Water Heater
C. Tankless Water Heater
D. Solar Water Heater
Solar water heater
128
uses heat from an existing boiler or furnace to heat water running through a heat exchanger inside of the water heater.
A. Heat Pump Water Heater
B. Indirect Water Heater
C. Tankless Water Heater
D. Solar Water Heater
Indirect water heater
129
a.k.a. instantaneous, continuous flow, on-demand water heater, are water heaters that instantly heat water as it flows through the device, and do not retain any water heater internally except for what's in the heat exchanger coils.
A. Heat Pump Water Heater
B. Indirect Water Heater
C. Tankless Water Heater
D. Solar Water Heater
Tankless water heater
130
In a residential setting, which is prohibited?
A. Gully Trap
B. Grease Trap
C. Building Trap
D. Two-way Trap
Correct answer: Building Trap
Source: International Plumbing Code
Additional info:
- Building Trap: A device, fitting or assembly of fittings installed in the building drain to prevent circulation of air between the drainage system of the building and the building sewer.
131
When threading a galvanized pipe, back off the stock handle _____ turn after each complete turn around the pipe.
A. 1-1/2 turns
B. 1/4 turn
C. 1 turn
D. 2 turns
Correct answer: one-quarter turn
Source: steeltubeinstitute.org
132
In a municipality, what might be an advantage if the houses have individual septic tanks instead of a centralized STP?
A. low maintenance
B. odor and vermin control
C. effluent is accessible for water reuse
D. treatment stages yield to cleaner effluent
A. low maintenance
133
What is the maximum flow rate of private lavatories?
A. 0.25 gpm
B. 1.5 gpm
C. 2.2 gpm
D. 2.5 gpm
Correct answer: 2.2 gpm
Additional info:
- 0.50 gpm at 60 psi- public lavatories
- 0.25 gal- public use, metering
134
What is the maximum flow rate of public lavatories?
0.50 gpm at 60 psi
135
What is the maximum flow rate of public use, metering
0.25 gal
136
What should you use to remove the gloss on the ends of a rigid plastic pipe?
A. Sandpaper
B. Steel wool
C. Emery cloth
D. Knife
Correct answer: Sandpaper
Additional info:
- PVC should be chamfered and even lightly sanded before gluing for better insertion on the fitting
- Steel Wool: used as an abrasive in finishing and repair work for polishing wood or metal objects, cleaning household cookware, cleaning windows, and sanding surfaces.
- Emery cloth: used primarily to smooth edges of copper piping
137
used as an abrasive in finishing and repair work for polishing wood or metal objects, cleaning household cookware, cleaning windows, and sanding surfaces.
A. Sandpaper
B. Steel wool
C. Emery cloth
D. Knife
Steel Wool
138
used primarily to smooth edges of copper piping
A. Sandpaper
B. Steel wool
C. Emery cloth
D. Knife
Emery cloth
139
Copper tube and fittings used for drainage and vent piping installed aboveground shall be at least _____.
A. Type L
B. Type K
C. Type DWV
D. Type M
Correct answer: Type DWV
Source: RNPCP, Chapter 14
Additional info:
- Type K: Heaviest; suitable for underground use
- Type L: Copper tube tor water supply piping shall have a weight of not less than Type "L".
- Type M: may be used for water piping when piping is above wound inside or atop a building, or underground outside of structures with outside protective coating.
140
Copper tube and fittings Heaviest; suitable for underground use
A. Type L
B. Type K
C. Type DWV
D. Type M
Type K
141
Copper tube tor water supply piping shall have a weight of not less than Type "K".
A. Type L
B. Type K
C. Type DWV
D. Type M
Type L
142
may be used for water piping when piping is above wound inside or atop a building, or underground outside of structures with outside protective coating.
A. Type L
B. Type K
C. Type DWV
D. Type M
Type M
143
A residence with 12 family members requires 3.6 cu. meters of cold water daily with peak demand. What is the maximum hot water probable hourly demand?
A. 100 liters
B. 140 liters
C. 120 liters
D. 110 liters
Correct answer: 120 liters
Additional info:
- Assume the multiplier is 80%. But according to code, the multiplier to get hot water demand is 75%.
Solution
3.6 cu.m to liters
3.6*1000=3600
If this 3600 liters is distributed over 24 hours, the average hourly demand is:
Average Hourly Demand = 3600 liters / 24 hours = 150 liters/hour.
Maximum Hot Water Probable Hourly Demand = Average Hourly Demand × Multiplier
Maximum Hot Water Probable Hourly Demand = 150 liters/hour × 0.80
Maximum Hot Water Probable Hourly Demand = 120 liters/hour
144
Name that tool which is made of boxwood, dogwood, or lignum vitae, and it is used for dressing or working sheet lead, lead pipe bends, and bath traps.
A. drift plug
B. shave hook
C. dresser
D. turnpin
Correct answer: dresser
145
tool used for expanding the ends of lead pipe
A. drift plug
B. shave hook
C. dresser
D. turnpin
Turnpin
146
used for stripping paint from surfaces such as window frames, mouldings, doors and furniture
A. drift plug
B. shave hook
C. dresser
D. turnpin
Shave hook
147
a hardwood plug that is conical or has rounded ends to be driven into or through a lead pipe to flare it or to straighten a buckle.
A. drift plug
B. shave hook
C. dresser
D. turnpin
Drift plug
148
According to Article 3.2.2.2 of PD 1096, New Sanitary Installations with more than 20 units of plumbing installations and water supply may be signed and sealed by a duly licensed Master Plumber. What is the other qualification needed?
A. Sanitary Engineering Experience
B. 5 years experience
C. Certificate of Recognition as a Plumber
D. Registered Engineer
Correct answer: Registered Engineer
Source: PD 1096 (Old)
149
What must be the reason why an instantaneous hot water sometimes does not produce hot water?
A. There is not enough power supply.
B. The water source is too far from the heater.
C. There is not enough water flow.
D. The unit needs time to pre-heat water.
Correct answer: There is not enough water flow.
Additional info:
- Instantaneous water heater requires minimum flow rate to activate the heating element.
150
All Siamese inlet connections shall be located on a street-front of the building and not less than ____ nor more than ____ above the grade and shall be equipped with a clapper-checks and substantial plugs.
A. 0.9 m; 1.2 m
B. 0.46 m; 1.22 m
C. 0.3 m; 1.2 m
D. 0.3 m; 0.9 m
Correct answer: 0.3 m; 1.2 m
Source: PD 1096
Take note of the construction of the question, which is verbatim from PD 1096. This can be mistaken as similar to the provision in RA 9514, which states that all fire service connections shall be 0.46 m to 1.22 m in height.
151
What is the importance of headwall in a culvert?
A. to stabilize the embankment and prevent erosion
B. to manage the velocity and intercept the water flow
C. to structurally support the road, embankment, or canal that sit above the culvert
D. to prevent flooding, hold water, and measure water flow
Correct answer: to stabilize the embankment and prevent erosion
Additional info:
- Culvert: A passage under a road, embankment or canal which allow for the flow of water.
- Headwall, Endwall, and Wingwall: An integrated wall located at either end of drainage pipe or a stream crossing structure. A wall built at a pipe inlet is a headwall
152
A passage under a road, embankment or canal which allow for the flow of water.
Culvert
153
An integrated wall located at either end of drainage pipe or a stream crossing structure. A wall built at a pipe inlet is a headwall
Headwall, Endwall, and Wingwall
154
What circumstances should the curb stop be used?
A. When the water has to be controlled
B. When the water pressure can cause flooding
C. When the pressure is excessive
D. When the water pressure is low
Correct answer: when the water has to be controlled
Additional info:
- Curb Stop: Curb stop service valves control the water running to a home or building from the City's water main.
- Pressure Relief Valve: a safety device designed to protect a pressurized vessel or system during an overpressure event
- Booster Pump: a device that increases low water pressure and flow
155
control the water running to a home or building from the City's water main.
Curb Stop: Curb stop service valves
156
a safety device designed to protect a pressurized vessel or system during an overpressure even
Pressure Relief Valve
157
a device that increases low water pressure and flow
Booster Pump
158
What is the ideal fixture that you would position adjacent to toilet blocks and wet areas, and provide facilities for cleaning staff that maintain the area?
A. Slop-hopper
B. Scrub Sink
C. Cleaner's Sink
D. Ablution Trough
Correct answer: Cleaner's Sink
Additional info:
- Slop-hopper: designed for use in hospitals, nursing homes and GP surgeries to enable the safe and hygienic disposal of clinical waste, such as the contents of vomit bowls, drainage bags, bedpans, and urine bottles.
- Ablution trough: typically used in preparation for formal prayers
- Scrub sink: serve as the scrub station for surgeons and other operating rooms staff to scrub their hands and arms before a surgical or invasive procedure
159
designed for use in hospitals, nursing homes and GP surgeries to enable the safe and hygienic disposal of clinical waste, such as the contents of vomit bowls, drainage bags, bedpans, and urine bottles.
A. Slop-hopper
B. Scrub Sink
C. Cleaner's Sink
D. Ablution Trough
Slop-hopper
160
typically used in preparation for formal prayers
A. Slop-hopper
B. Scrub Sink
C. Cleaner's Sink
D. Ablution Trough
Ablution trough
161
serve as the scrub station for surgeons and other operating rooms staff to scrub their hands and arms before a surgical or invasive procedure
A. Slop-hopper
B. Scrub Sink
C. Cleaner's Sink
D. Ablution Trough
Scrub sink
162
What really seals a caulked joint?
a. lead
b. cement
c. epoxy
d. oakum
a. lead
163
a term which refers to securing equipment of materials for lifting by mean of rope, chain, or web sling.
a. lifting
b. rigging.
c. handling
d. knotting
b. rigging
164
as an experienced plumber, what is the recommended size of the drain serving water closet?
a. 3"
b. 4"
c. 5"
d. 6"
b. 4"
165
What should be used in supporting horizontal single run in plumbing pipe?
a. clamp hanger
b. clevis hanger
c. trapeze hanger
d. bracket hanger
b. clevis hanger
166
Jacuzzi:
a. an italian invertor of jack pump
b. a kind of plumbing tool
c. a brand name of manufacturer of water body massage plumbing fixture
d. an equipment for cleaning swimming pool
c. a brand name of manufacturer of water body massage plumbing fixture
167
What will be the horizontal distance from the foot of the ladder to the wall that you will consider proper?
a. 1/4 of the ladder effective length
b. 1.3 of the ladder effective length
c. 1/2 of the ladder effective length
d. 3/8 of the ladder effective length
a. 1/4 of the ladder effective length
168
The length of a pipe along its centerline and fittings
a. invert
b. developed length
c. length of pipe
d. travel length
b. developed length
169
How many thermostats does an electric water heater have?
a. 1
b. 2
c. 3
d. 4
b. 2
170
a 50mm diameter pipe is needed to carry the water supply. how many pipes should be provided if the only available size is 12mm diameter?
a. 6
b. 4
c. 16
d. 18
d. 18
additional info
number of pipes = (Diameter of large pipe / Diameter of small pipe)^2
= (50/12)^2 = 17.36 round off to 18
171
What is the standard specification for polybutylene plastic hot and cold water distribution systems.
a. astm d2662
b. astm d3309
c. astm a74
d. astm d3350
b. astm d3309
172
What is the standard specification for polybutylene plastic (PB) plastic pipe (SIDR-PR) based on controlling side
a. astm d2662
b. astm d3309
c. astm a74
d. astm d3350
a. astm d2662
173
What is the standard specification for cast iron soil pipe and fittings
a. astm d2662
b. astm d3309
c. astm a74
d. astm d3350
c. astm a74
174
What is the standard specification for Polyethylene plastics pipe and fittings materials
a. astm d2662
b. astm d3309
c. astm a74
d. astm d3350
d. astm d3350
