Journeyman, Review Package Number Six Flashcards
(104 cards)
1
Q
What would be the total force exerted on the gate of a 6 inch gate valve if the water pressure against it was 46 psi G
A
1300 pounds
2
Q
Asbestos cement pipe installed below a 60 mm thick concrete floor must be at least how deep
A
600 mm
If concrete slab is less than 75 mills The ASBESTOS OR VIRTIFIED CLAY PIPING must be at least 600mm down from slab
3
Q
When may a backwater valve be installed in a building drain
A
When it is normally open
4
Q
What is the most likely reason for a well pump coming on as soon as the faucet is open?
A
A waterlogged pressure tank
5
Q
A 4 inch cast-iron pipe with 1 inch insulation is the past through a wall how large diameter hole is required to be cut
A
6 1/2 inches
Remember to account for OD. Cast and others like (most) are measured in I.D and that would be a the reason of the your anwser would be 6”. But accounting a for the wall thickness
6
Q
What must be installed along with any gear pumps
A
A pressure relief valve
7
Q
A drainage pipe suspended from a ceiling inside a building is 7 1/2 inches from the ceiling to its centre at the most upstream end. What will be the measurement from the ceiling to the centre of the pipe if it travels 26 feet horizontally has a 8 foot horizontal offset using 2-45 elbows and then continues another 37 feet
A
26 inches
8
Q
A branch with 34 fixing units discharges into a sewage sump what is the minimum size vent for the sump?
A
3 inches
9
Q
A building’s roof measuring 90 m x 50 m would require how many flow control roof drains?
A
Five
10
Q
A flat roof measures 20 m x 26 m and has a vertical wall on one side measuring 6 m x 20 m size the circular litre if the local rainfall intensity is 24 mm x 15 minutes
A
5 inch
11
Q
What must accompany a lab sink that receives biohazardous waste?
A
A clean out above flood level rim
12
Q
How’s the absorption rate of a step septic field determined?
A
By a percolation test
13
Q
How is medical gas piping joined
A
By brazed joints
14
Q
What is required on a circuit vented branch that has a horizontal offset using two- 45° elbows
A
An additional circuit vent
15
Q
How much expansion will occur when a 15 m ABS pipe has a temperature change of 40°
A
60 mm ( SEE NOTES IN NPCB 2.3.3.11(2) )
16
Q
Which backflow preventer below is not testable
A.PVBA
B.DCAP
C.RPBA
D.DCVA
A
B.DCAP
17
Q
Properly cut thread on black iron pipe should allow how many hand turns of a fitting
A
3 1/2
18
Q
What is the minimum distance between a well and a septic field?
A
30 m (SPM BC)
19
Q
An air conditioner that discharges 0.05 L per second of condensation into a floor drain that would equate to how many fixture units
A
Two
( 0.05 l per second x 31.7 fu ) = 1.57 fu
Round up equals 2
20
Q
Underground piping installed in a dug trench should be covered with appropriate backfill to what height
A
300 mm
21
Q
Which of the following is not a hot water heating piping system
A.series loop
B. 2 pipe reverse return
C. 2 pipe direct return
D.one pipe gravity return
A
D.one pipe gravity return
22
Q
Where is the ideal installation location for a circulator in a heating system
A
On the supply downstream of the expansion tank
23
Q
When determining the location to install a condensing boiler, what must be considered?
A
Proximity to a floor drain
24
Q
The discharge piping from a water service heaters T & P relief valve must be discharged within how many millimetres of a floor drain or suitable area
A
300 mm
25
Length is not considered when sizing one of these vents
A relief vent
B.stack vent
C.vent header
D.circuit vent
A.relief vent
26
Across fitting may not be installed in a DWV system except to connect what
Four vents
27
Which of the following may a half inch extracted tea formed from?
A. Three-quarter type M.
B. Half inch type K.
C. Half inch type L.
D. Three-quarter type K.
D. Three-quarter type K.
28
If four showerheads are installed along the wall, what would be the minimum measurement between the two outermost heads?
2.25 m
( minimum 750mm between adjacent heads) only THREE SPACING! Draw out do not multiply by 4 only the spaces BETWEEN THE 4 heads)
29
What is the minimum size vent for an oil interceptor?
1-1/4”
Code clause 2.5.5.2 sentance (a) shall not be less than 1-1/4”
30
What is a four wire zone valve wire to?
Thermostat, transformer, relay coil, control circuit
31
Which of the following fixtures may not be indirectly connected to a drainage system
A. a commercial dishwasher
B.a sterilizer
C.a drinking fountain
D.a water softener discharge
A commercial dishwasher
Clause 2.4.2.1
32
What are the minimum service connections for a mobile home?
4 inch sewer, and a three-quarter inch Water service
33
A pressure reducing valve must be installed if a service pressure is above what psi
80 psi
34
A twin tank water softener will house the brine in one tank and what in the other
Zeolite
35
Water that has dissolved mineral content of more than 181 mg/L would be called what
Hard water
150 -200mg/l = hard water
36
A private water cistern is fitted with a three-quarter, make up water pipe, installed by a municipal system. What size airgap would be required
Inch and a half gap
37
What does NPS stand for?
Pipe size
38
What is the maximum nominal horizontal offset permitted in a 3 inch soil or waste stack that is serving as a wet vent
2.5 m
Clause 2.5.2.1 sentance (i)
39
Which manufacturing method produces the strongest pipe
Extruded ( because it doesn’t have a weld, welds are always the weakest point)
40
What is the principle used in the operation of a water softener?
Ion exchange
41
If a flush tank urinal continuously flushes, what is faulty
The Siphon
Note : odd install- has a flush tank with a siphon feeding urinals. The flush tank volume determines how many urinals can be installed. The tank fills until it reaches the siphon, when the siphon is reached. Since the siphon is the was of flushing, if the urinals are continuously flushing the problem must be the siphon
42
When is a recirculating line necessary on a domestic hot water line
When it’s over 30 m in length or over four stories in height
43
Four lavatories measuring 24“ x 18“ are to be dual vented with 8 inches of space between basin edges. What is the centre to centre measurement of the dual vents?
64 inches
44
Why should copper pipes not be installed tight against wood structural members?
The noise of the water flowing will be transmitted through the building
45
Where is series 160 polyethylene pipe allowed to be used?
For a water service pipe
46
What is the suggested replacement interval for a hardhats suspension?( webbing.)
Annually
47
What is the suggested replacement interval for most hardhats?
Every five years
48
What is the suggested minimum distance between an excavation and any soil piles?
1000 mm
49
Where can galvanized steel pipe and fittings be used?
For the repair of an existing galvanized steel system
Clause 2.2.6.7 - sentence (3) galvanized steel pipe and fittings shall not be used in a water distribution system unless: for repair of existing galvanized steel piping system.
50
Where can a sanitary cross not be used?
A. to drain two lavatory’s connected to a circuit vent
B. To drain two kitchen sinks that are wet venting a water closet.
C. To drain two wall hung water closets installed back to back.
D. To tie for vents together.
C. To drain two wall hung water closet back to back
51
What is required of every screw nut or bolt used at the base of a water closet?
Must be corrosive resistant
52
Figure out what the minimum size water softener for a three day regeneration cycle is with this information
five people in the household
hardness of water 32 grains per gallon water usage is 60 US gallons per person per day
Mathematical Anwser = 28’800
E.F.T60MI – 40,000 grains capacity
5 x 60 gal per day = 300
300 x 32gpg 3 days =
28,800 grains of hardness
( IF QUESTION ON IP DOES NOT ADD UP THEY MIGHT BE USING FORMULA THAT REQUIRES YOU TO ADD 20%)
53
What does a U value of 0.05 indicate
An aggregate with an “R” value of 20
54
If an insulating material is given in “r” value of 12 what does that mean?
It takes 12 hours for one BTU to pass through it
55
Calculate the approximate total heat loss for a storage garage using the following criteria
Room is 24 x 32 with an 8 foot ceiling
Walls are R22 insulation
Windows and doors are R 10 in insulation
Room has two windows that are 4’ x 5’ and two doors 3’ x 7’
Outdoor design temp equals 12 Fahrenheit indoor design temperature equals 72 Fahrenheit attic is R 40 insulation no heat loss through the floor
3800 BTUs per hour
Walls r22 (1/22) = 0.045 u value
Windows & door r10 (1/10) =0.1 u value
Ceiling - R40-(1/40) =39.975 0.025 uvalue
ODT = 12F•
IDT = 72f•
Delta T = 60f•
Windows (3x7x2)=42 ft (sq)•
Doors (4x5x2 ) =40 ft(sq)
Doors plus windows = 82ft sq x U” 0.1 x delta T 60f = 492 BTUS
Ceiling 24’ x 32’ =768’sq
768 x 0.25 u value x 60•f = 1152btus
Walls 24x8’x2 ( two 24’ walls) 384’ sq
Wall #2 - 32x8’x2’ =512 ‘ sq
Walls total = 384+516’=900’(sq) - Windos&doors 82’(sq) = 814’sq
Walls (-D&W) = 814’sq x 0.045 x 60f• =
2197btus for walls
ALL BTUS
WALLS 2197btu +ceiling 1152btu + 492btu
= 3841BTUH TOTAL
56
What type of valve would best be used to throttle water through a portable water system?
A globe valve
57
What type of valve would be correct for controlling the flow of milk through stainless steel piping in a dairy farm?
A diaphragm valve
58
In pump language, what are all factors of pressure expressed as?
Feet of head
59
What would be used to correctly size a deep well submersible pump
Elevation of head plus pressure head plus friction head
60
The burner to a forced air furnace is found to be over firing should be the remedy
Reduce burner input
61
After pressing the red relight button on a newly installed hot water tank with a standing pilot, the pilot flame will not immediately light what is most likely the cause
Air in the gas line to the tank
62
A standing pilot on the existing hot water tank will not stay lit. What is the most likely failed component in the thermal couple that has been replaced after a no heat call
The S.S.o.V magnet
THE S.S.O.V magnet is the part that HOLDS the pilot gas open on the Saftey shut off valve when the the fusible link on the thermal couple is heated and creating voltage.
The voltage is should be there because it was just replaced so that means it would be the SSOV magnet would be the culprit
63
Hot water tank thermocouple has been changed after a no heat call what is most likely cause of the pilot flame going out as soon as the relight button is released
The fusible link has melted
64
A flush tank type toilet only removes the components of the bowl on every second flush what is the most likely cause?
Water from the refill tube is not getting into the overflow tube
Explained
the it is ONLY getting water from the refill tub. Meaning the tank needs to fill up enough with the refill tube to flush, no help from over flow.
65
The direct flush valve for a toilet runs continuously. What is the most likely cause?
The diaphragm is torn
66
A toilet has water continuously spilling into the overflow tube and the ball cock will not shut off what is the most likely cause
The tank float is out of adjustment
67
A toilet has water running continuously into the tank and the tank ball is at fault what is most likely the cause?
The lift wire is hung up
( chain from handle to flapper)
68
What is built into a “mono flow” T that enables it to do what it is intended to do
A Venturi
69
And what type of hydronic system would you find a “monoflo” T
A one pipe system
70
Whose principle is responsible for the operation of a “mono flow” T
Bernoulli‘s principle
71
What is generally, the accepted, vertical height difference between the inlet and outlet of a septic tank?
2 inches
72
When assembling concrete sewer pipe where is the lubrication app applied?
Onto both the spigot and rubber seal before the spigot is inserted into the bell end
73
In a hydraulic heating system, what must be done to protect the tubing that passes through an expansion joint in concrete
The tubing is placed in a sleeve
74
What is the degree of flared connection on all pipe trades?
45°
75
What type of valves is used on emergency showers?
Manual open closed
76
How much sludge should be left in a septic tank after pump out
5 gallons
77
What is the size for water closet carrier hardware
5/8Ths
78
What appurtenance is required with public sink?
Soap dispenser
79
At 2000 feet above sea level the approximate practical lift of a pump would be
23 feet
( you loose 1 foot of practical lift every 1000 ft of above sea level)
80
What is the correct method for cutting glass pipe?
Score pipe then heat
Piping is scored internally
Than it is heating
81
Funny pipe may be used for what
Exterior irrigation systems
82
An expansion joint on a soil race stack may be omitted if a sanitary drain projects horizontally how many feet?
5 feet
(Old school/no literature) horizontal portion of sanitary drain was longer
83
What is the minimum depth of “cold caulking” compound required for 200 mm hub and spigot C.P.S.p installed in pipe Chase
1 inch
Clause 2.3.2.1 sentance (2) every joint shall be installed shall be firmly packed with 25mm (1”) of oakum/solvent
84
What is minimum length of a 2 x 10 scaffold plank for 8 foot wide scaffolding
9 feet???
Example
Looking from side view of the scaffold you have a 8 foot wide scaffold but your platform is needed to extend 6” on ethier side. That multiplied by 2 accounting for both sides would = 12”. This added to your 8 foot width is equal to 9’ plank to rest atop of your scaffolding.
85
What material used in a septic field that allows oxygen to penetrate the gravel bed
Sandy loam
86
A water softener size based on a
three day regeneration cycle with
four people using it at 75 L per day
a clothing washer at 75 L per day and
28 g per gallon of hardness
would have how many total grains
Answer when converting liters to gallons
9,947 grains ( + 20% equation)
8289.4 grains ( non 20% equation)
(Answer if units were gallons)-
31,500 grains
!WATCH FOR UNITS ON THIS QUESTION! On IP
This question uses litres.
75 liters per day x (4 people + 1 cloths wash) x 28gpg x 3= 31,500
87
Before shutting the domestic water down in a “large“ apartment building a plumber should what
Notify the owners representative
88
Magnetic traps are used in food processing piping to remove what
Ferrous metal tramps
(Simple form)
Any metal tramps (shards small fragments) within system (ferrous metals) would magnetically stick to trap removing them from the flow of the system
89
What type of soil is best suited for septic field
Sandy Loam
90
Laterals of septic field shall be installed with perforation at what two indications on a clock
And what grade shall the piping be ran at?
Eight and 4 o’clock 0% grade
Explained
Minimum grade for laterals is 1-2” per 100ft of pipe
(Grade calculation)
1 divided by the 100 foot lateral = 0.17%
With regards to the question asked about what the grade is - 0.17% (definitive grade) 0% grade is the closest
91
What colour of labeling/stencilling is associated with drainage piping
Yellow
92
Non-potable water is identified with what colour
Purple
93
Above What depth is, trenching or showering is required “BC value”
4 feet
94
There are 25 toilets to be installed in a building each toilet takes two hours to install. It takes 15 minutes to set up in 15 minutes to move to the next washroom. The job needed to be completed in eight hours. How many plumbers will it take?
Eight plumbers
25 toilets devided by 8 hours = 3.125 toilets needing to be done per hour multiplied by 2.5hrs per toilet = 7.8125 plumbers. Can’t have .8125 of a person so 8 plumbers to do the job ( round up not down)
95
A plumber can dig 2 ft.³ of trench per hour a trench has a width of 3 feet and a height of 4 feet. How long will it take to plumbers to dig a 10 feet trench
30 hours
Math
3wx4hx10long = 120 cubic feet of trench devided by 4 cubic feet per dug per house = 30 hours
96
On a radon gas system from the floor line to the radon Matt what is the correct orientation of the components?
Gooseneck, exhaust fan, gas sensor.
97
What is the minimum acceptable clearance around a valve handle of a fire hose cabinet?
1 inch
98
How many BTUs are required to raise 30 imperial gallons from 14°F to 180°F
90,300 BTUs
Math
30impgals x 10LBs per impgallon = 300 pounds
300lbs x delta T of 18f• x 0.5 ( sensible heat calculation for heat) = 2700 btus
Latent heat 300 x 144 ( ice to water) = 43,200 btus
Sensible heat 300lbs of water x delta T of 148f• = 44,400 btus
99
Approximately how many 1 inch steam lines may be supplied from a 4 inch steam header
16
4 squared x 0.7854 = A
1 squared x 0.7854 = B
A divided by B = 16
100
A heating/cooling tower has been sized provide 24,000 BTUs on one floor and 12,000 BTUs on another floor how many tonnes of heating/cooling will the tower need to supply
Three
A ton of heating/cooling = 12,000 btus
Math
36’000 bruh (total) decided by 12’000 = 3 tonns of cooling
101
20 m of mild steel pipe installed at 17°C encounter as a temperature rise of 50°C how much will the steel pipe expand?
12 mm
102
What kind of pump is a gear pump
Positive displacement pump
103
What does a positive displacement pump need
A pressure relief valve
104
What is tubing gain?
Tubing gain is the amount of pipe saved from bending the pipe
“Explained from Devon (paraphrasing)” if you were to walk 1km straight In one direction and 1km straight in another compared to walking and curving at the of the first km to change your direction you will have saved walked a shorter distance to get to the same destination.
