PRACTICAL PROBLEM PREBOARD Flashcards
(159 cards)
1
Q
Is a valve installed on water service to turn on or off the flow of potable water in the building
a. Curb Cock
b. Stop Cock
c. Stop box
d. Corporation Cock
A
Correct answer: Curb cock
Additional info:
- Curb cock has the same mechanism of a Gate Valve
2
Q
In a high-rise building with a pressurized gas line, where do you need to boost the pressure for the gas supply?
a. lowest floor
b. outside
c. uppermost floor
d. mid-level
A
Correct answer: lowest floor
Additional info:
- the gas will be quick to rise to the upper floors due to density differential
3
Q
Which is true regarding the plumbing installation in the elevator shaft?
a. Sprinklers are required in the top of shaft whether the hoistway is combustible or non-combustible.
b. Plumbing systems shall not be located in an elevator shaft.
c. Drainage systems inside the shaft strictly should be in plastic material.
d. Water supply pipes along the elevator shaft shall be labeled.
A
Correct answer: Plumbing systems shall not be located in an elevator shaft.
Additional info:
- Floor drains and sumps are permitted as long as they are indirectly connected with the drain.
4
Q
A sudden valve closure in one branch of a pipeline system has inflicted water hammer in other branches as well. What is the explanation for this phenomenon?
a. pipe elasticity
b. air pockets
c. fluid compressibility
d. flow velocity
A
Correct answer: fluid compressibility
Additional info:
- The slight degree of compressibility of a fluid expands, sending a pressure wave that can travel through the other branches.
5
Q
The most reliable method of measuring and cutting of pipe connection
a. End to end
b. Spigot to hub
c. Engagement length to face
d. Face to face
A
Correct answer: Face to face
Source: PDE by Max Fajardo
Additional info:
- Spigot to hub: a joint suitable for pipes with hubbed ends like cast iron, PVC etc.
- Engagement length to face: Engagement length refers to the part of the pipe beyond its face, which will enter the hub
- End to end: end of pipes are being inserted into the hub
6
Q
What is the main use of chain wrench?
a. to turn or hold steel pipes
b. to turn nuts & bolts
c. to turn or hold copper pipes
d. to turn screws
A
Correct answer: to turn or hold steel pipes
Additional info:
- Chain wrench: A double jaw gives fast, ratchet-like action in either direction.
7
Q
What is the air duct valve?
relief valve
damper
check valve
gate valve
A
Correct answer: damper
Additional info:
- An HVAC damper (also called a duct damper) is a movable plate, located in the ductwork, that regulates airflow and redirects it to specific areas of the home.
8
Q
A lavatory pop-up assembly is _____.
a. 1-1⁄4” and sealed with putty or caulk
b. 1-1⁄2” and only sealed with putty
c. Not required for wall-hung sinks
d. 1-1⁄2” and is not sold with a faucet
A
Correct answer: 1 1⁄4” and sealed with putty or caulk
9
Q
Where does the soldering of a rigid copper tubing joint require the torch heat to be placed?
a. solder
b. flux
c. pipe
d. fitting
A
Correct answer: fitting
Additional info:
- Torch heats up the fitting; the fitting heats up the solder
10
Q
In cutting a copper pipe tubing or other thin-walled pipe materials, what is an important consideration?
a. To apply even pressure and rotate the pipe
b. To apply maximum force in one rotation
c. To use a blade with low TPI
d. To use hacksaw for an even cutting
A
Correct answer: To apply even pressure and rotate the pipe
11
Q
The operating nut in a valve is not turning in either direction. Which of the following is not a probable cause of this problem?
a. Uneven tightening of screws and bolts
b. Excessive pressure holds down the nut
c. Debris has built up within the body
d. Lack of operation
A
Correct answer: Excessive pressure holds down the nut
Additional info:
- Water pressure interacts with the disc, not the nut around the stem
12
Q
When the handle of a butterfly valve is aligned with the pipe, it is said to be in what position?
a. neither open or close
b. open position
c. close position
d. wrong position
A
Correct answer: open position
Additional info:
- To open or close a butterfly valve, turn the handle of the valve a quarter turn. This causes the disc to move from perpendicular to the flow of media to the parallel position.
13
Q
A horizontal drainpipe has an existing load of 30 fixture units. After adding a new discharge pipe from an ejector rated at 60 gpm, the total load on the horizontal drainpipe will be how many FU?
a. 130
b. 150
c. 120
d. 90
A
Correct answer: 150 FU
Source: UPC
Additional info:
- For a continuous flow into a drainage system, such as from a pump, sump ejector, air conditioning equipment, or similar device, 2 fixture units shall be equal to each gallon per minute (gpm) of flow.
1gpm = 2 fixture units
30 + (60x20) =150
14
Q
The reference in measuring the depth of a trap seal of the P-trap.
a. Crown weir to top dip
b. Crown weir to bottom dip
c. Inlet to outlet
d. Bottom dip to top dip
A
Correct answer: Crown weir to top dip
15
Q
The center of a drain that serves a 12” rough toilet installed along a wall with 1⁄2” drywall ____.
a. does not comply with the contemporary installation standards
b. is roughed in at 12 1⁄2” from the wall stud
c. is roughed in at 12” from the wall stud
d. is rare and only used in a commercial project
A
Correct answer: Is roughed in at 12 1⁄2” from the wall stud
rough in should start on the exterior of the wall
16
Q
The principal function of expansion tank in a hot water system.
a. Provide air cushion in the system to prevent overflowing
b. Lets thermal expansion of water to maintain working pressure
c. Takes off small amounts of water inside the boiler as a way of eliminating impurities
d. Provides necessary space for the air required in the system
A
Correct answer: lets thermal expansion of water to maintain working pressure
Additional info:
- Surface blowoff: takes off small amounts of water inside the boiler as a way of eliminating impurities
17
Q
What valve regulates the intake of gravity tank?
a. foot valve
b. float valve
c. ball valve
d. gate valve
A
Additional info:
- Float Valve: open and closes according to the liquid level that is sensed by the float
- ball valve: a shut off valve that controls the flow of a liquid or gas by means of a rotary ball having a bore
- gate valve: used to isolate specific areas of the water supply network during maintenance, repair works, new installations, as well as to reroute water flow throughout the pipeline.
- foot valve: allow the pump to stay primed, letting liquid to flow in, but keeping it from flowing back out
18
Q
open and closes according to the liquid level that is sensed by the float
a. foot valve
b. float valve
c. ball valve
d. gate valve
A
Float Valve
19
Q
a shut off valve that controls the flow of a liquid or gas by means of a rotary ball having a bore
a. foot valve
b. float valve
c. ball valve
d. gate valve
A
ball valve
20
Q
used to isolate specific areas of the water supply network during maintenance, repair works, new installations, as well as to reroute water flow throughout the pipeline.
a. foot valve
b. float valve
c. ball valve
d. gate valve
A
gate valve
21
Q
allow the pump to stay primed, letting liquid to flow in, but keeping it from flowing back out
a. foot valve
b. float valve
c. ball valve
d. gate valve
A
foot valve
22
Q
What is the minimum size of a fire hose outlet of an interior wet standpipe?
a. 50 mm
b. 32 mm
c. 41 mm
d. 38 mm
A
Correct answer: 38 mm
Source: RA 9514
Additional info:
- Size of wet standpipe shall not be less than 64 mm in diameter.
23
Q
In what instances that a mechanical drainage will be used?
a. Building is provided with basements and subbasements
b. Drainage cannot be affected by gravity
c. Pump or ejectors are readily available
d. The volume of sewage is excessive
A
Correct answer: drainage cannot be affected by gravity
Additional info:
- if the drainage cannot be affected by gravity, sump or ejector pumps must be used
24
Q
Leaks in gas piping shall be, in the most practical way, located by applying _____.
a. a noncorrosive leak detection fluid
b. soapy water to the exterior of the piping
c. potable water to the interior of the piping tube
d. fire or acid to the pipe joints
A
Correct answer: soapy water to the exterior of the piping
Source: Bienvenu.com
25
What is a valve which regulates water pressure from the water main?
a. Pump Suction Valve
b. Pressure Separating Valve
c. Pressure Suction Valve
d. Pressure Sustaining Valve
Correct answer: Pressure Sustaining Valve
Source: bermad.com.au; various websites
Additional info:
- Pressure Sustaining Valve: maintains a minimum set pressure upstream of the valve, catering for fluctuations in pressure on either side of the value. This is achieved by the valve gradually opening or closing to maintain a set pressure. See Bermad’s range of pressure sustaining valves below.
26
maintains a minimum set pressure upstream of the valve, catering for fluctuations in pressure on either side of the value. This is achieved by the valve gradually opening or closing to maintain a set pressure.
Pressure Sustaining Valve
27
Always located near the stairs for use by firemen in case of fire.
a. Fire Hose
b. Standpipe
c. Sprinkler
d. Siamese
Correct answer: Fire Hose
Source: PDE by Fajardo
Additional info:
- Standpipe: a pipe installed in buildings not as part of the water supply or disposal system, but primarily for use as water conveyance in case of fire.
- Sprinkler: consists of horizontal pattern of pipes placed near the ceiling where fire hazard requires its use
- Siamese: a hose fitting with clapper valves for combining the flow from two or more lines of hose into a single stream.
28
a pipe installed in buildings not as part of the water supply or disposal system, but primarily for use as water conveyance in case of fire.
a. Fire Hose
b. Standpipe
c. Sprinkler
d. Siamese
Standpipe
29
consists of horizontal pattern of pipes placed near the ceiling where fire hazard requires its use
a. Fire Hose
b. Standpipe
c. Sprinkler
d. Siamese
Sprinkler
30
a hose fitting with clapper valves for combining the flow from two or more lines of hose into a single stream.
a. Fire Hose
b. Standpipe
c. Sprinkler
d. Siamese
Siamese
31
Installation of water service must be direct and in short manner. Possible turns or offset elbows should be avoided because the element will incur _____.
a. cross connection
b. friction losses
c. backflow
d. water hammer
Correct answer: Friction losses
32
These rainwater pipe shapes may be used and are considered when enclosing an inscribed circle equivalent to the drain leader diameter, except _____.
a. semi-circular
b. rectangle
c. round
d. square
Correct answer: semi-circular (not included)
Source: RNPCP
33
Reciprocating saw blades are selected based on the type of material being cut, length, and?
a. thickness
b. teeth per inch
c. manufacturer
d. weight
Correct answer: teeth per inch
Additional info:
- For very hard materials, more teeth per inch may improve performance. Use more teeth per inch for a smoother finish. For faster cutting, use fewer teeth per inch but maintain a minimum of 3 teeth in contact with the work at all times.
34
Which of the following processes is used to remove dissolved gases, such as oxygen and carbon dioxide, from liquids in order to prevent corrosion and improve process efficiency?
a. Filtration
b. Deaeration
c. Aeration
d. Ozonation
Correct answer: Deaeration
Source: sciencedirect.com
Additional info:
- Filtration: the clear water passes through filters that have different pore sizes and are made of different materials (such as sand, gravel, and charcoal)
- Aeration: the process of increasing or maintaining the oxygen saturation of water in both natural and artificial environments
- Ozonation: ozone is injected into water, and immediately starts oxidizing and eliminating contaminants, such as bacteria, viruses, and metals
35
the clear water passes through filters that have different pore sizes and are made of different materials (such as sand, gravel, and charcoal)
a. Filtration
b. Deaeration
c. Aeration
d. Ozonation
Filtration
36
the process of increasing or maintaining the oxygen saturation of water in both natural and artificial environments
a. Filtration
b. Deaeration
c. Aeration
d. Ozonation
Aeration
37
ozone is injected into water, and immediately starts oxidizing and eliminating contaminants, such as bacteria, viruses, and metals
a. Filtration
b. Deaeration
c. Aeration
d. Ozonation
Ozonation
38
A lamination of brown (kraft) paper, fiberglass cloth (skrim) and a metallic film. A vapor barrier is also included. It is most often used to cover fiber-glass insulation.
a. All-Special Jacket
b. Aluminum Jacket
c. Stainless Steel Jacket
d. All-Service Jacket
Correct answer: All-Service Jacket (ASJ)
Additional info:
- Aluminum Jacket: The corrugated material is used where expansion and contraction of the piping may be a problem. These jackets are also made in various tempers and alloys.
- Stainless Steel Jacket: used for hygienic purposes and are adhered in a manner similar to that used for aluminum.
39
The corrugated material is used where expansion and contraction of the piping may be a problem. These jackets are also made in various tempers and alloys.
a. All-Special Jacket
b. Aluminum Jacket
c. Stainless Steel Jacket
d. All-Service Jacket
Aluminum Jacket
40
used for hygienic purposes and are adhered in a manner similar to that used for aluminum.
a. All-Special Jacket
b. Aluminum Jacket
c. Stainless Steel Jacket
d. All-Service Jacket
Stainless Steel Jacket
41
How many turns does it take to operate an 8" double-disk valve?
a. 29
b. 28
c. 30
d. 27
Correct answer: 27
Source: AWWA
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.
8 x 3 + 3 = 27
42
What type of steel pipe is manufactured without any welding joints by extruding a billet through a die?
a. None of the choices
b. Seamless Pipe
c. Brazed Pipe
d. Welded Pipe
Correct answer: Seamless pipe
Additional info:
- Seamless Pipe: from solid steel that is in sheet or bar form and is formed into a solid round shape known as “billets” which are then heated and cast over a form such as a piercing rod to create a hollow tube or shell.
- Brazed Pipe: any joint obtained by joining of metal parts with alloys which melt at temperatures higher than 449 degrees centigrade, but lower than the melting temperature of the parts to be joined
- Welded pipe: refers to a type of steel pipe that is manufactured by welding together steel plates or coils to form a cylindrical shape.
43
from solid steel that is in sheet or bar form and is formed into a solid round shape known as “billets” which are then heated and cast over a form such as a piercing rod to create a hollow tube or shell.
a. None of the choices
b. Seamless Pipe
c. Brazed Pipe
d. Welded Pipe
Seamless Pipe
44
any joint obtained by joining of metal parts with alloys which melt at temperatures higher than 449 degrees centigrade, but lower than the melting temperature of the parts to be joined
a. None of the choices
b. Seamless Pipe
c. Brazed Pipe
d. Welded Pipe
Brazed Pipe
45
refers to a type of steel pipe that is manufactured by welding together steel plates or coils to form a cylindrical shape.
a. None of the choices
b. Seamless Pipe
c. Brazed Pipe
d. Welded Pipe
Welded pipe
46
Tighten the fitting by using two _____.
a. Valves
b. Wrenches
c. Hands
d. Fittings
Correct answer: Wrenches
Source: Audel
47
Which of the following are considered the best two pipe materials for medical vacuum systems in healthcare facilities?
a. Brass and Copper
b. Stainless Steel and Brass
c. Copper and Stainless Steel
d. Copper and Brass
Correct answer: Copper and Stainless Steel
Source: up.codes
48
A unique design multiplies the turning force applied to a pipe; Ideal for freeing locked couplings and joints frozen by age or damage.
Compound Leverage Wrench (Tool A)
49
Features a jaw opening parallel to the handle and a narrower hook jaw head; Provides easy entry into tight spots.
Offset Pipe Wrench (Tool B)
50
Assures a fast and easy grip for pipe working in restricted spaces or close to a wall; Provides a faster, easier way to get a grip and long handle swing; Ideal for pipe work close to a wall, in tight quarters or in closely-spaced parallel lines.
End Pipe Wrench (Tool C)
51
A heavy sprocket chain that is slipped around a pipe, then attached to wrench handled and used on piping work especially large size pipe metal pipes and in areas that is not easily accessible
a. adjustable spud wrench
b. compound chain wrench
c. offset chain wrench
d. chain wrench
Correct answer: Chain wrench
Additional info: A spud wrench is a wrench with an adjustable or standard box wrench on one end and a tapered spike on the other.
52
A handheld shower hose that could be submerged in bath water must _____.
a. always have a backflow prevention device installed
b. never have a backflow prevention device installed
c. be no longer than 36”
d. always be at least 5’ in length
Correct answer: Always have a backflow prevention device installed
Additional info:
- a backflow prevention device can ensure than water will only flow in one direction
53
To boost the water pressure of hot water, use _____.
a. circulating pump
b. hydroelectric tank
c. gravity tank
d. elevated water tank
Correct answer: circulating pump
Additional info:
- elevated water tank/ gravity tank: uses its head as additional pressure for supply of cold/room-temperature water
- hydroelectric tank: water is circulated between the upper and lower reservoirs to store and generate power
54
uses its head as additional pressure for supply of cold/room-temperature water
a. circulating pump
b. hydroelectric tank
c. gravity tank
d. elevated water tank
elevated water tank/ gravity tank
55
water is circulated between the upper and lower reservoirs to store and generate power
a. circulating pump
b. hydroelectric tank
c. gravity tank
d. elevated water tank
hydroelectric tank
56
a water supply pipe connecting the fixture with the fixture branch
Fixture Supply
57
the water supply pipe between the fixture supply pipe and the water distributing pipe
Fixture Branch
58
Effective thread depth of a 3/4" pipe
a. 7/8"
b. 3/4"
c. 5/8"
d. 3/8"
Correct answer: 3/4"
Additional info:
- 1/8" pipe size: thread length of 3/8"
- 1/4" - 3/8" pipe size: thread length of 5/8"
- 1/2" - 3/4" pipe size: thread length of 3/4"
- 1" pipe size: thread length of 7/8"
59
1/8" pipe size: thread length of
a. 7/8"
b. 3/4"
c. 5/8"
d. 3/8"
3/8"
60
1/4" - 3/8" pipe size: thread length of
a. 7/8"
b. 3/4"
c. 5/8"
d. 3/8"
5/8"
61
1/2" - 3/4" pipe size: thread length of
a. 7/8"
b. 3/4"
c. 5/8"
d. 3/8"
3/4"
62
1" pipe size: thread length of
a. 7/8"
b. 3/4"
c. 5/8"
d. 3/8"
7/8"
63
If there is a problem with spa jet to make the warm water ideal for the user, which is the most appropriate troubleshooting procedure?
a. Increasing the capacity of the pump
b. Setting the air intake to more appropriate setting
c. Use a hydro jet pump
d. Adding another pump
Correct answer: Setting the air intake to more appropriate setting
Additional info:
- A small hole for air intake is opened or closed using an air controller, which adds or removes air into the hot tub jet. It also increases power.
64
Gravity grease interceptors shall not be installed in any part of the building where ______.
a. it is installed in a public area
b. the fixture served is on the second floor
c. laundry is handled
d. food is handled
Correct answer: food is handled
Source: UPC
Additional info:
- A gravity grease interceptor that complies with IAPMO Z1001 shall not be installed in any part of the building where food is handled.
- IAPMO Z1001: The ANSI/CAN/IAPMO Z1001 standard covers prefabricated gravity grease interceptors made of concrete, fiber‐reinforced polyester (FRP), thermoplastic, or steel, and specifies requirements for design, materials, performance, testing and markings.
65
Which of the following is not a green building initiative?
a. high efficient clotheswashers
b. swimming pool covers
c. faucet aerators
d. high flush toilets
Correct answer: High Flush toilet
Additional info:
- low flush toilets & composting toilets is a green building initiative
66
In a drawing, what does the scale of 1:75 mean?
a. 1 m on plan= 750 cm on actual
b. 1 m on plan = 75 cm on actual
c. 1 cm on plan= 7.5 m on actual
d. 1 cm on plan = 0.75 m on actual
Correct answer: 1 cm on plan = 0.75 m on actual
or
1 cm on plan = 75 cm on actual
67
A pump capable of generating 125 feet of head of gasoline would provide a pressure of _____.
a. 45.8 psig
b. 40 psig
c. 55.3 psig
d. 37.8 psig
Correct answer: 37.8 psig
Additional info:
- In average, specific gravity of gasoline is 0.72.
- specific gravity of oil is 0.821
- specific gravity of water is 1.00
- specific gravity of seawater is 1.026
formula
Pressure = head x specific gravity / 2.31
2.31 = 1ft of head of psi
P = 125 x 0.72 / 2.31 = 37.8
68
Best pipe for corrosion resistance
a. copper
b. galvanized steel
c. stainless steel
d. cast iron
Correct answer: stainless steel
Additional info:
- Zinc protection for the galvanized steel/iron doesn't guarantee long-term protection against corrosion
- Cast iron is also susceptible to rust and corrosion
- Copper is discouraged to be used for chemical or industrial wastes
69
Which is not true about copper joints?
a. it is important to deburr the pipe before using swaging and flaring tools
b. joints using swaging tool require heating
c. swaging tool is used for flared joints
d. flared joints are reliable for both water and gas piping
Correct answer: swaging tool is used for flared joints
Additional info:
- Swaging tool is used to create a hub end to fit another pipe in preparation for soldering/brazing joint
70
1 Fixture unit rate of flow is nearest equivalent to?
a. 7 gpm
b. 1 gpm
c. 30 quarts per minute
d. 25 Liters
Correct answer: 30 quarts per minute
Additional info:
- 1 FU- 28.3 liters per minute; 30 quarts is 28.39 liters per minute
71
The granule test is intended to simulate a flush of water feces in the case of diarrhea. The initial flush must result into no more than how many granules on average to remain in the bowl?
a. 25
b. 125
c. 75
d. 100
Correct answer: 125 granules
Additional info:
- The granule test utilizes approximately 2,500 disc-shaped granules of polyethylene
72
Many power tools have a side handle _____.
a. that is used to minimize injury from a possible violent reaction of the tool
b. for beginners to become comfortable with tool use
c. that is removed when a person is becoming comfortable with tool use
d. to use if osha is on the job site
Correct answer: that is used to minimize injury from a possible violent reaction of the tool
73
A type of shovel used for general digging. Penetrates moist clays and sands.
a. square pointed shovel
b. round pointed shovel
c. trenching shovel
d. spade
Correct answer: round pointed shovel
Additional info:
- Square pointed shovel: good at scooping soil from the skirting of the garden paths and weeding out unruly grasses from the outer corner of the lawns or drive.
- Spade: used for digging straight-edged holes or trenches, slicing and lifting sod, and edging flower beds or lawns.
- Trenching shovel: designed to make narrow trenches and are often used when laying irrigation pipes.
74
good at scooping soil from the skirting of the garden paths and weeding out unruly grasses from the outer corner of the lawns or drive.
a. square pointed shovel
b. round pointed shovel
c. trenching shovel
d. spade
Square pointed shovel
75
used for digging straight-edged holes or trenches, slicing and lifting sod, and edging flower beds or lawns.
a. square pointed shovel
b. round pointed shovel
c. trenching shovel
d. spade
Spade
76
designed to make narrow trenches and are often used when laying irrigation pipes.
a. square pointed shovel
b. round pointed shovel
c. trenching shovel
d. spade
Trenching shovel
77
In a company, who is in-charge as infection control officer?
a. utility manager
b. master plumber
c. supervisor
d. pollution control officer
Correct answer: pollution control officer
Additional info:
- infection control officer: an individual designated by a health care facility to provide surveillance, detection, prevention, or control of infectious agents.
78
Plastic pipes are manufactured from _____.
a. Thermoplastics
b. Rubber-based plastic
c. Thermoset
d. None of the choices
Correct answer: Thermoplastics
Additional info:
- Thermoplastics can melt under heat after curing.
- Thermoset plastics retain their form and stay solid under heat once cured.
79
An interceptor must have a clearance above it that is _____.
a. greater than the height of the internal removable baffle
b. at least 500 mm above the interceptor
c. twice the largest dimension of the removable access panel
d. twice the size of the inlet opening
Correct answer: greater than the height of the internal removable baffle
Source: Zurn
80
The rule of thumb for tightening pipe threads and compression fitting is hand-tightened plus _____ turn/s with wrench.
a. 1
b. 1 to 2
c. 1/2
d. 2 to 3
Correct answer: 1 to 2
Source: Audel; Various sources
Additional info:
- Fit to Hand Tight: refers to hand-tightened screw without the use of any sealant
81
What do you call the valve installed at the end of a pump to prevent the loss of prime of the pump?
a. jet pump
b. flapper valve
c. check valve
d. foot valve
Correct answer: foot valve
Additional info:
- Check Valve: also called a one-way valve, is a device that allows the flow of fluids to move only in one direction.
- flapper valve: A kind of valve used in toilets, water softeners, etc. to create a watertight seal in the tank that holds water until it needs to be flushed, at which point the valve is raised.
- jet pump: used to draw water from a well through a suction pipe in order to provide potable water or domestic water pressure.
82
also called a one-way valve, is a device that allows the flow of fluids to move only in one direction.
a. jet pump
b. flapper valve
c. check valve
d. foot valve
Check Valve
83
A kind of valve used in toilets, water softeners, etc. to create a watertight seal in the tank that holds water until it needs to be flushed, at which point the valve is raised.
a. jet pump
b. flapper valve
c. check valve
d. foot valve
flapper valve
84
used to draw water from a well through a suction pipe in order to provide potable water or domestic water pressure.
a. jet pump
b. flapper valve
c. check valve
d. foot valve
jet pump
85
How do you join medical gas piping?
a. flared joints
b. wiped joints
c. silver brazes
d. threaded joints
Correct answer: silver brazes
Additional info:
- Threaded joints: for thick-walled pipes; most often, copper tubes which are thin-walled are used for medical gas piping
- Flared joints: for soft copper tube
- Wiped joints: mostly for lead pipes
86
mostly for lead pipes
a. flared joints
b. wiped joints
c. silver brazes
d. threaded joints
Wiped joints
87
for soft copper tube (annealed tube)
a. flared joints
b. wiped joints
c. silver brazes
d. threaded joints
Flared joints
88
To minimize the threat of polluting a well, the casing is _____.
a. Kept to a shallow depth
b. Grouted
c. Not installed
d. Only installed when the well is near a road
Correct answer: grouted
Additional info:
- Grouting is the process by which the space between the borehole and the well casing is sealed to prevent contaminants from the surface and upper water table seeping down into the lower water supply for the well, wherever wells are drilled.
89
A specialty plumbing tool with a rotating, self-adjusting gripping head and long handle. It is used to tighten and remove the mounting nuts of faucet tailpieces.
a. basin wrench
b. chain tong
c. strap wrench
d. raprench
Correct answer: basin wrench
Additional info:
- Basin Wrench's telescopic shank allows easy access for the nuts underside the lavatory
- Chain Tong: Designed and sized to provide extra leverage for the toughest jobs.
- Raprench: A deeper and broader hook jaw housing provides a smooth, flat surface that is ideal for occasional use as a hammer.
- Strap wrench: Best for any polished pipe. Strong, woven nylon strap gives tight grip.
90
telescopic shank allows easy access for the nuts underside the lavatory
a. basin wrench
b. chain tong
c. strap wrench
d. raprench
Basin Wrench
91
Designed and sized to provide extra leverage for the toughest jobs
a. basin wrench
b. chain tong
c. strap wrench
d. raprench
Chain Tong
92
A deeper and broader hook jaw housing provides a smooth, flat surface that is ideal for occasional use as a hammer.
a. basin wrench
b. chain tong
c. strap wrench
d. raprench
Raprench
93
Best for any polished pipe. Strong, woven nylon strap gives tight grip.
a. basin wrench
b. chain tong
c. strap wrench
d. raprench
Strap wrench
94
Minimum thickness of vent connector shall be at least _____.
a. 0.500 mm
b. 0.345 mm
c. 0.304 mm
d. 0.600 mm
Correct answer: 0.345 mm
Source: International Mechanical Code
Additional info:
- 0.345 mm thick for galvanized steel
- 0.600 mm for copper
- 0.500 mm for aluminum
95
Minimum thickness of vent connector of galvanized steel.
a. 0.500 mm
b. 0.345 mm
c. 0.304 mm
d. 0.600 mm
0.345 mm thick for galvanized steel
96
Minimum thickness of vent connector of copper.
a. 0.500 mm
b. 0.345 mm
c. 0.304 mm
d. 0.600 mm
0.600 mm for copper
97
Minimum thickness of vent connector of aluminum.
a. 0.500 mm
b. 0.345 mm
c. 0.304 mm
d. 0.600 mm
0.500 mm for aluminum
98
This is used as a source of heat when melting lead and heating the soldering copper for pipe jointing.
a. Soldering gun
b. Propane torch
c. Blow torch
d. Fire extinguisher
Correct answer: Blow torch
Additional info:
- Blow torch are used for varying tasks ranging from soldering and brazing to welding and heat shrinking
- Propane is a type of blow torch
99
Which of the following terms best describes the straw-like effect of creating negative pressure that can draw liquids upward?
a. Vacuum Pressure
b. Back-siphonage
c. Suction
d. Capillary Action
Correct answer: Suction
Additional info:
- Back-siphonage: a reversal of normal flow in a system caused by a negative pressure (vacuum or partial vacuum) in the supply piping
- Vacuum Pressure: an air pressure less than atmospheric. Also, implies siphonage in piping system.
- Capillary Action: occurs when the liquid climbs up a narrow straw or tube against gravity due to the liquid being sticky against the plastic straw or tube.
100
a reversal of normal flow in a system caused by a negative pressure (vacuum or partial vacuum) in the supply piping
a. Vacuum Pressure
b. Back-siphonage
c. Suction
d. Capillary Action
Back-siphonage
101
an air pressure less than atmospheric. Also, implies siphonage in piping system.
a. Vacuum Pressure
b. Back-siphonage
c. Suction
d. Capillary Action
Vacuum Pressure
102
occurs when the liquid climbs up a narrow straw or tube against gravity due to the liquid being sticky against the plastic straw or tube.
a. Vacuum Pressure
b. Back-siphonage
c. Suction
d. Capillary Action
Capillary Action
103
A child’s water child’s water closet has a rim height of closet has a rim height of ________ above the floor. Many plumbing codes require these water closets in daycare centers and kindergarten toilet rooms for use by small children.
a. 14 inches
b. 18 inches
c. 10 inches
d. 12 inches
Correct answer: 10 inches
Source: ASPE
Additional info:
- 13" height: for juvenile
- 14" - 15" height: standard water closet has a rim height
104
height: for juvenile toilet
13" height
105
standard water closet rim height
14" - 15" height
106
How many bolt holes are there in a Class 150 pipe flange that is 100 mm in diameter?
a. 8
b. 12
c. 4
d. 20
Correct answer: 8
107
Surfaces to be joined by soldering or brazed shall be cleaned bright by _____.
a. mechanical or manual means
b. corrosive flux
c. self-cleaning flux
d. sulfuric acid
Correct answer: mechanical or manual means
Source: UP.codes
Additional info:
- Emery cloth is a sample of a cleaning material
108
Plumbing pipe color coded in aqua-blue stripe or band is identified as what pipe?
a. raw water pipe
b. potable water pipe
c. air pipe
d. gas pipe
Correct answer: potable water pipe
Additional info:
- gas pipe: yellow
- raw water: green
- air pipe: light blue
109
What is the consumption demand of a bathtub faucet?
a. 0.007
b. 0.011
c. 0.022
d. 0.019
Correct answer: 0.019 or 5gpm
Source: engineeringtoolbox.com
Various sources may have different answers.
110
One of the first steps in the selection of a suitable water supply source.
a. Potability
b. Topography
c. Depth of Source
d. Cost
Correct answer: Potability
Additional info:
- Potable water means water that is safe to drink.
111
For globe valves which has leak at the stem and packing nut, the best thing to do is ____.
a. set in the new packing
b. reassemble the valve
c. disassemble the valve from the wheel handle to the body
d. replace the packing nut and wheel handle
Correct answer: set in the new packing
Additional info:
- Packing: pushed into a stuffing box and adjusted from time to time by tightening down a packing gland or packing nut.
- Packing gland: device that holds and compresses the packing and provides for additional compression by manual adjustment of the gland
as wear of the packing occurs. A packing gland may be screwed or bolted in place.
- Packing nut: A nut that is screwed into place and presses down upon a gland bushing, which transmits the force exerted by the packing nut
to the packing. It serves the same purpose as the packing gland.
112
pushed into a stuffing box and adjusted from time to time by tightening down a packing gland or packing nut.
Packing
113
device that holds and compresses the packing and provides for additional compression by manual adjustment of the gland
as wear of the packing occurs. A packing gland may be screwed or bolted in place.
Packing gland
114
A nut that is screwed into place and presses down upon a gland bushing, which transmits the force exerted by the packing nut
to the packing. It serves the same purpose as the packing gland.
Packing nut
115
What would be the probable cause of a water closet leak of the floor connection?
a. loosening of bolt washers
b. condensation of atmospheric moisture on the tank's outer surface
c. seating seal is not holding against the heavy discharge pressure of each flush
d. rubber flush ball is not seating properly
seating seal is not holding against the heavy discharge pressure of each flush
116
A watertight seal between a drain assembly and fixture is created using putty or what material?
a. Caulk
b. Rubber Cement
c. Cement
d. Glue
Correct answer: Caulk
Additional info:
- Caulk: a pliable, waterproof adhesive used to fill crevices
117
For a leaking concrete water tank due to crack, which of the following repair material is most suitable and economical to seal the crack without disrupting the water supply of the building?
a. water plug
b. concrete grout
c. concrete mortar
d. concrete epoxy adhesive
Correct answer: Water Plug
Source: sika.com; horizonpoolsupply.com; various websites
Additional info:
- Water Plug: a one-component, quick-setting, Portland-cement-based hydraulic repair mortar that instantly stops running water through holes or cracks in concrete or masonry
- Concrete Epoxy: Epoxy is an adhesive used for bonding concrete. Epoxy resins are used with concrete in the form of coatings, repair materials, grouts, bonding agents, paints, adhesives, epoxy mortars, sealers, penetrating sealers, wearing surfaces, and as admixtures to hydraulic cement concrete to make epoxy polymer-modified concrete.
118
a one-component, quick-setting, Portland-cement-based hydraulic repair mortar that instantly stops running water through holes or cracks in concrete or masonry
a. water plug
b. concrete grout
c. concrete mortar
d. concrete epoxy adhesive
Water Plug
119
Epoxy is an adhesive used for bonding concrete. Epoxy resins are used with concrete in the form of coatings, repair materials, grouts, bonding agents, paints, adhesives, epoxy mortars, sealers, penetrating sealers, wearing surfaces, and as admixtures to hydraulic cement concrete to make epoxy polymer-modified concrete.
a. water plug
b. concrete grout
c. concrete mortar
d. concrete epoxy adhesive
Concrete Epoxy
120
It produces small current when heated. It also acts as a safety component of the burner.
a. thermopile
b. spark igniter
c. pilot light
d. thermocouple
Correct answer: thermocouple
Additional info:
- thermopile: found in electric water heaters which procude more current than thermocouple
- pilot light: a small flame that is kept lit in certain gas-fired appliances
- spark igniter: ignites the pilot light
121
found in electric water heaters which produce more current than thermocouple
a. thermopile
b. spark igniter
c. pilot light
d. thermocouple
thermopile
122
a small flame that is kept lit in certain gas-fired appliances
a. thermopile
b. spark igniter
c. pilot light
d. thermocouple
pilot light
123
ignites the pilot light
a. thermopile
b. spark igniter
c. pilot light
d. thermocouple
spark igniter
124
A tank that is used so that the pneumatic tank or other pump sucks the water from this tank and not the public main, so that it will not deprive the neighbors of water due to pressure.
a. Compressor Tank
b. Suction Tank
c. Air Tank
d. Plunger Tank
Correct answer: Suction Tank
Additional info:
- Suction Tank: An enclosed container that has a partial or complete vacuum applied to it for the purpose of drawing things into the inlet port
125
In PD 856 Sanitation Code of the Philippines, the effective depth of a septic tank is measured from the bottom of septic tank to the _____.
a. invert of inlet pipe
b. invert of discharge pipe
c. liquid line
d. bottom of the manhole
Correct answer: liquid line
Source: PD 856
Additional info:
Effective capacity of a septic tank- The actual liquid capacity of a septic tank as contained below the liquid level line of the tank
126
What should be done after cutting a copper?
a. swaging
b. cleaning using emery cloth
c. reaming
d. flaring
Correct answer: reaming (After cutting, the copper must be reamed.)
Source: copper.org; various websites
127
Maximum length of nipple fitting
a. 12"
b. 6"
c. 8"
d. 4"
Correct answer: 12"
Additional info:
- Nipple: a piece of pipe less than 12 inches in length threaded on both ends.
- Cut pipe: Pipe longer than 12 inches
128
This describes the putting of pipe and fittings together without making a permanent joint for the purpose of checking the feasibility of an installation.
a. Mock-up installation
b. Roughing-in
c. Trial Installation
d. Dry fitting
Correct answer: Dry Fitting (synonymous to test fitting)
Additional info:
- Roughing-in: installation of all pipings and fitting parts which can be completed prior to installation of fixtures and accessories
- Mock-up: full-size representations of proposed construction, built in order to evaluate proposed design and construction details or to test for performance.
129
installation of all pipings and fitting parts which can be completed prior to installation of fixtures and accessories
a. Mock-up installation
b. Roughing-in
c. Trial Installation
d. Dry fitting
Roughing-in
130
full-size representations of proposed construction, built in order to evaluate proposed design and construction details or to test for performance.
a. Mock-up installation
b. Roughing-in
c. Trial Installation
d. Dry fitting
Mock-up
131
Fitting used in septic tank.
a. wye
b. tapped tee
c. sanitary tee
d. 90 deg bend
Correct answer: sanitary tee
Additional info:
- Among the choices, the sanitary tee is fit for drainage flow
132
_____ comes in coils of 60 or 100 feet. Types of K and L can be used above and below ground. Both types have the advantage of bending tool for installation.
a. Galvanized Steel Pipe
b. Flexible Plastic Pipe
c. Rigid Copper Tubing
d. Flexible Copper Tubing
Correct answer: Flexible Copper Tubing
Additional info:
- Rigid Copper Tubing: comes in 10 and 20 foot lengths and is used only above ground. Types K, L, and M have the same outside diameter to accept fittings. The inside diameters for K, L, and M are different.
133
For light and ordinary hazard, what is the maximum spacing between sprinklers?
a. 2.4 m
b. 4.6 m
c. 4.8 m
d. 3.7 m
15 ft / 4.6 m maximum
133
For ordinary hazards, what is the maximum spacing between sprinklers?
a. 2.4 m
b. 4.6 m
c. 4.8 m
d. 3.7 m
Correct answer: 4.6 m
Source: NFPA 13
Additional info:
- For light and ordinary hazard- 15 ft / 4.6 m maximum
- For extra hazard: 12 ft / 3.7 m maximum
134
For extra hazard, what is the maximum spacing between sprinklers?
a. 2.4 m
b. 4.6 m
c. 4.8 m
d. 3.7 m
12 ft / 3.7 m maximum
135
How much thread must you extend beyond the die stock to completely thread the pipe's end?
a. 1/4 inch
b. 1/2 inch
c. 1/8 inch
d. 5/8 inch
Correct answer: 1/4 inch
136
Which of the following listed fitting do not have the similar function?
a. Plug
b. Blank Flange
c. Cap
d. Blind Flange
Correct answer: Plug
Additional info:
- Cap, Blind Flange, and Blank Flange closes end of pipes
- Plug closes end of fittings
137
A cylindrical tank which is a connection point by which fire fighters can tap into a water supply.
a. standpipe
b. fire sprinkler
c. fire hydrant
d. water tank
Correct answer: fire hydrant
138
This is used to remove square and octagonally-shaped threaded faucets. It has a right angle bar with one end for square nuts and other octagonal.
a. Valve seat wrench
b. Basket strainer wrench
c. Closet wrench
d. Basin wrench
Correct answer: jetter
Additional info:
- high pressure force cup, toilet plunger, and closet snake use manual pressure from the user
- water jetter: powerful drain cleaning machines that use high-pressure water jets to clear obstructions in residential and commercial drain pipes as well as larger municipal sewer systems.
139
A concrete restraint utilized to prevent pipe joints from separating under the force carried fluids.
a. thrust block
b. pipe saddle
c. concrete saddle
d. pipe clamp
Correct answer: Thrust Block
Source: aboutmechanics.com
Additional info:
- Pipe Saddle: any pipe support that cradles a pipe and transfers the pipe's load weight onto a supporting base
- Pipe Clamp: used as an efficient and tidy way to restrain, secure and guide tubing or conduit for a range of plumbing, heating and electrical purposes.
- Concrete Saddle: any pipe support that cradles a pipe and transfers the pipe's load weight onto a supporting base.
140
any pipe support that cradles a pipe and transfers the pipe's load weight onto a supporting base
a. thrust block
b. pipe saddle
c. concrete saddle
d. pipe clamp
Pipe Saddle
141
used as an efficient and tidy way to restrain, secure and guide tubing or conduit for a range of plumbing, heating and electrical purposes.
a. thrust block
b. pipe saddle
c. concrete saddle
d. pipe clamp
Pipe Clamp
142
any pipe support that cradles a pipe and transfers the pipe's load weight onto a supporting base.
a. thrust block
b. pipe saddle
c. concrete saddle
d. pipe clamp
Concrete Saddle
143
It is considered to be the most quiet, most efficient and most sanitary water closet. this type of bowl develops its flushing action through the water entering through diagonal holes around the rim which creates a swirling action which forms a vortex in the center
a. siphon jet
b. washdown
c. siphon vortex
d. reverse trap
Siphon vortex
144
The jet being submerged reduced its water underwater so that its operation is entirely muffled
a. siphon jet
b. washdown
c. siphon vortex
d. reverse trap
siphon jet
145
The least expensive but noisiest; only small amount of standing water - susceptible to fouling. staining and contamination.
a. siphon jet
b. washdown
c. siphon vortex
d. reverse trap
Washdown
146
the trap way located at the rear of the water closet eliminated the buldge at the front. the design and appearance of the bowl plus its large water area and quietness in operation. make it desirable than siphon washdown
a. siphon jet
b. washdown
c. siphon vortex
d. reverse trap
reverse trap
147
How many units do the controversial article 3.2.2.2 of PD 1096 otherwise known as the national building code limits the practice of master plumber?
a. 10
b. 5
c. 20
d. 50
20
148
Suitable gasket material for a flange union used for gasoline conduction is ______
a. sheet rubber or asbestos sheet packing
b. metallic or where permitted, asbestos composition
c. metallic
d. rubber or asbestos composition
c. metallic
149
Gasket for Cold water piping
a. sheet rubber or asbestos sheet packing
b. metallic or where permitted, asbestos composition
c. metallic
d. rubber or asbestos composition
Sheet rubber or asbestos sheet packing
150
Gasket for hot water lines
a. sheet rubber or asbestos sheet packing
b. metallic or where permitted, asbestos composition
c. metallic
d. rubber or asbestos composition
rubber or asbestos composition
151
Gasket for gas piping
a. sheet rubber or asbestos sheet packing
b. metallic or where permitted, asbestos composition
c. metallic
d. rubber or asbestos composition
e. leather or abestos composition
leather or asbestos composition
152
Gasket for Oil lines
a. sheet rubber or asbestos sheet packing
b. metallic or where permitted, asbestos composition
c. metallic
d. rubber or asbestos composition
Metallic or where permitted, asbestos composition
153
Gasket for Gasoline conduction
a. sheet rubber or asbestos sheet packing
b. metallic or where permitted, asbestos composition
c. metallic
d. rubber or asbestos composition
Metallic
154
in the ink test of a water closet, after flushing, no individual segment of line can exceed____. the total length of the remaining ink line must not exceed _____.
a. 1/2" ; 2"
b. 1" ; 2"
c. 1/2" ; 3"
d. 1-1/2" ; 2"
a. 1/2" ; 2"
155
Which type of support may be used on vertical pipes and stacks?
a. bracket
b. Trapeze
c. metal strap
d. clevis
c. metal strap
156
automatic flush valves (flushometers) operate _____.
a. when a user enter a set of range
b. once every 10 minutes
c. when a user exits a set of range
d. once every minute
c. when a user exits a set of range
157
The most common type of PVC & steel based on their wall thickness is rated as ______.
a. schedule 80
b. schedule 100
c. schedule 40
d. schedule 120
c. schedule 40
158
Leaching fields should be how far away from a shallow well to prevent contamination of water?
a. 3m
b. 15m
c. 30m
d. 45m
c. 30m
