GA IP Flashcards
What tool is used to tighten a supply tube on a water tank supply?
an adjustable wrench
What material screws are used on a toilet flange?
Brass or corrosion resistant screws
If a toilet flange is deeper than the floor what will be used?
Max wax (not extension)
Manhole diameter of bottom
1M
Softener - stop used on upstream or downstream?
upstream
Lower boom hand signal
Crane downward load moment signal
Min air gap?
1” or 2x pipe diameter
min air break?
1” or 1x pipe diameter
Manhole cleanout size?
8”
6 urinals, their side distance is 1m, what is the c-c measurement?
Glycol add on 2 questions
Max temperature for drain pipe?
75 degrees C
Water check valve
Pipe is 100m on hot side, what is needed?
Re-circ
When using an MJ wye, you need to subtract ___”-___” than actual pipe length
1/4”-1/2”
T or F
you need two vents on an oil interceptor, one on the inlet and one on the outlet
True
Min size for oil interceptor vent?
1-1/4”
2” inlet drain to pump, what is the vent size?
2” min
oil interceptor vents min distance between outside _____mm
300mm
Input tool for air what items are required:-
a) F – Filter ( to filter particles )
b) R – Regulator ( to regulate the pressure )
c) L – Lubricant
F,L & R all required
21) Paint tool/gun/spout for what items required for air used to working this tool:-
a) F – Filter ( to filter particles )
b) R – Regulator ( to regulate the pressure )
F and R
c) Important: Lubricant not used on paint spray gun. B.coz oil will goes with paint and destroy the job
22) To stop the water for urinal/Water Closet flush valve which tool used:-
Flat screw Driver
Trap arm length maximum for 3” size pipe
12’
Single rodding 3” pipe distance =__ m
15m
BTU given, how many ton ac need:-
a) 12000 BTU = 1 ton
b) 18000 BTU = 1.5 ton
c) 24000 BTU = 2 ton
Commercial hot water tank what temp required?
180 f or 82.2 C
14” cast iron pipe, what is OD size ?
14” O.D size
Acetylene cylinder how we store long time ?
Ans: - Vertical and fastned.
Potable water what we can use?
a) Dcap
b) Dcva
c) Rpba
Which solder we can use for drinking?
Ans: - Lead free
Which solder we can use ?
a) 95/5
b) acidic
Ans: - 95/5
What is 95/5 Lead Free Plumbing Wire Solder ?
:- Alloy of 95% - Tin and 5 % —-
Antimony Melting Temperature: - 450 – 464 ℉
What is Aquasol Lead Free Plumbing Wire Solder ?
Tin - 95.75 ,
Silver - .25 %
Copper – 3 % ,
Antimony - 1%
Melting Temperature:- 416 – 454 ℉
Ans:- All of below:-
Tin - 95.75 ,
Silver - .25 %
Copper – 3 % ,
Antimony - 1%
Melting Temperature:- 416 – 454 ℉
39) Where is Venturi on Pump?
Ans:- on Suction line of pump or up stream side of pump.
What we use underground on copper joint?
a) Solder
b) brazing
c) Flaring
b) brazing
how for is toilet flange from Finish wall?
a) 11 “
b) 12 “
c) 13 “
b) 12 “
What material screws used to toilet flange :
Ans: - corrosion resistance ( exp. Brass )
When 5 Psig test done ?
Ans :- Cross- Connection test
45 X 60 roof drain area given, how many drains need ?
Ans:- 4 drains
What is the not function of the Pipe Dope?
a) Lubricating
b) union
c) Di-electric
Ans:- C) Di-electric
What we have do / maintain on solar System ?
Ans: - Visualise glycol check in system, check with strip, glycol add
When pouring the concreate on oxy pipe installed , what we we do ?
a) air filled
b) Air filling after few time
c) Sleeved
d) Use something under the concrete
Wall hung toilet how we forward little bit to front?
Ans:- Nut adjustment
Harness rope not good, what we have to do?
Ans:- replace with new one
) Boiler union leak, what we can do?
a) Silicone
b) Teflon
c) tight the union
Ans:- c) Tight the union
Which backflow device we used on irrigation?
Ans: - DCVA
Which backflow device we used on Chemical/ Toxic/ Hospital/ health safety/ food places?
Ans: - RPBA
RPBA maximum height?
Ans: - 1’
RPBA maximum height?
Ans:- 5’
) If we flushing a new piping with chlorine water, what we have to do?
Ans:- keep Flushing
What is the ph-8 level
Ans:- Mild alkine
What is Ph-12 Level means?
Ans:- strongly Alkline
1/8 fitting angle
Ans: 360/8 = 45 degree
copper bend process ?
Ans:- Anneal, slow cool down, bend
what hammering in laundry, whats reason?
Ans:- Watter hammering.
Bottom floor have 18,000 BTU and top have 12,000, find AC size?
Ans:- Total Btu = 18,000 + 12,000 = 30,000 AC Size = 30,000/12,000 = 2.5 ton
What need to instal on air tool before supply to tool?
F – Filter ( to filter particles )
R – Regulator ( to regulate the pressure )
L – Lubricant
Ans:- FRL
need to install
What we have to do if siphonic level is less in the tank?
Ans:- Increase the level
What type of system used in reverse Osmosis system.
Ans:- Plastic
When Energised equipment used, what need to remember?
Ans: Check its safe
20’ ladder, distance from wall?
Ans:- 5’
Copper and cast-iron drainage connected, what used?
a) Dielectric
b) Mech coupling
c) Transition coupling
Ans: - Mech Coupling
1-1/2 abs pipe how cut?
Ans:- hacksaw or Pipe Cutter
1-1/2 Copper DWV pipe how we cut?
Ans: - Pipe Cutter
Sink drainage pipe, what is the max temp required?
Ans:- 75 degree Celsius
What is the developed length of a 3-compartment sink
Ans: - 1200 mm
What is the developed length of a 2-compartment sink?
Ans: - 1200 mm
What is the floor drain length, if not vented?
Ans: - 450 mm ( and also if the size of trap not less than 3”, fall on drain not exceed its size)
What is the minimum floor drain Size, if not vented?
Ans: - 3”
What is the minimum floor drain Size, if vented?
Ans: - 2”
What would be required to braze a 2” brass MIP onto a copper tube?
Ans:- High temp flux.
Where trap primer install on faucet?
Ans:- Often used faucet
To stop the water for urinal/Water Closet flush valve which tool used:-
Ans: - Flat screw Driver
What is trench drain ratio?
Ans: 3:4
1” pipe how many thread used?
Ans: - 11.5 threads
300 EDR equal to how many MBTU ? ( 1EDR = 240 BTU. )
Ans:- 1 EDR = 240 BTU
300 EDR = 300 x 240 = 72000 BTU
Now, 1000 BTU = 1 MBTU
1 BTU = 1/1000 MBTU
72,000 BTU = 72,000/ 1000
= 72 MBTU
88) Acetylene Cylinder how store long term?
Ans: - Fastened and Vertically store.
14” cast iron pipe, how much O.D.?
Ans:- 14” O.D
Compressor Lock-out procedure steps? Ans: - ?????
Fire hydrant Siamese connection size?
Ans: - 65 mm or 2-1/2” Female connection.
Why we use Siamese Y connection? .
Ans:- To prevent freezing
How long cast iron pipe need to cut, to install wye?
Ans:- ¼” to ½” bigger size
Water colour red in toilet tank, what’s the reason?
Ans:- more Iron in water OR ( only 1 came in exam )
If water colour black in toilet tank, what’s the reason?
Ans: - Magnesium more in water
How many hangers are required on 4” cast iron pipe, if used on 3M and every hub/spigot joint? ‘
a) 14
b) 15
c) 16
d) 17
What is the procedure to assemble compression joint on copper tubing?
Ans : Cut, ream, slide nut and ferrule(also called ring or sleeve) over tubing, push tubing completely into socket then tighten nut 2.
What is the procedure to assemble flaring joint on copper tubing?
Ans: - Cut the pipe , Ream the pipe, Put the nut on pipe, Flare the pipe
When installing ABS pipes and fitting at -15°C (5°F) bracket, what is done to ensure adhesion?
a) Dilute the glue
b) Warm up the glue
c) Apply more glue
d) Apply more pressure
b) Warm up the glue
What is the procedure to assemble a hub and spigot gasket joint on plastic pipe?
Ans : Cut Ends of Pipe Square, clean pipe and fitting, Lubricate Gasket and Spigot, then Push spigot into Hub at determined depth
If on boiler rating written 30 PSI and 140,000 BTU which T & P valve we need?
Ans: - T & P valve with 30 PSI and 150,000 BTU rating ( means more rating than 140,000 BTU )
) If a drain required 900 Square meter, how many drains are required if we have 60 X 45 metre area
Ans: - Area = 60 x 45 = 2700 square meter
Drains Required = 2700/ 900 = 3 drains
Or
We have length = 60 and Width = 45
Drains required for length side = 60/30 = 2
Drains required for Width side = 45/30 = 1.5 means 2
Total drains required = Length wise drains X Width wise drains = 2 x 2 = 4 drains
Note:- Please check, which answer match with given answers
103) What would be installed in the water piping to and a from hydronic unit?
a) 1 Isolation valve, 2 Unions, 1 Vent, 1 drain
b) 2 Isolation valve, 2 Unions, 1 Vent, 1 drain
c) 2 Isolation valve, 2 Unions, 1 Vent
d) 1 Isolation valve, 2 Unions, 1 drain
Ans : - b) 2 Isolation valve, 2 Unions, 1 Vent, 1 drain
104) What Steps are followed to join Bell & Spigot pipe in draining system?
Ans: - Cut pipe, ream outside pipe and inside spigot, clean, lubricate inside and outside of fitting, push pipe together
what device control the intervals at which effluent is discharged to a gravity fed distribution field?
Ans: - Bell and Siphon
What additional equipment is required at the END of the building plastic ( Polyethylene ) water service suitable for cold water application?
Ans: - Check Valve come with diaphragm Tank
107) Plastic service pipe ENTERED at home, which valve we used?
Ans: - Globe valve / ball valve
108) Steam generator when connect with hot water, which p-trap is used?
a) Thermo-dynamic
b) Thermo-static
Ans: - Thermo-dynamic
109) Pipes for steam systems are commonly manufactured from ______ _____
carbon steel
Soil around the trench end how far need to throw away?
Ans: - 1 M ( 3’ )
Which copper joint we used underground?
a) Copper tubes shall install underground approved flare, compression and brazed.
b) . But Careful Compression fitting shall not be used underground, under a building.
Ans: - a) Copper tubes shall install underground approved flare, compression and brazed.
What is minimum and maximum trap arm of 2” shower?
Ans:- Minimum trap arm for 2” shower = 2d = 2x2 = 4” or 100mm
Maximum trap arm for 2” shower = 2.4 Meter or 2400 mm
113) Where would be cleanout installed ( if required ) on a 6 storey rainwater leader?
a) A cleanout is not required on leader
b) Cleanout is only required upstream size of any offset over 1.5
c) On alternative storey with a maximum separation of 7.5 M
d) Within 3m upstream of the bottom of the leader.
Ans: d) Within 3m upstream of the bottom of the leader.
114) What is suction line and drive line size?
Ans:- Suction line = 1-1/4” Drive Line ( Discharge line ) = 1”
We 1l/s = 31.7 fu = 900 L ,
what is the value of 2.5 l/s.
a) 79.3 FU
b) 2250 L
1 L/s = 31.7 Fu
2.5 L/s = 2.5 x 31.7 = 79.25 FU
And 1 L/s = 900 L 2.5 L/s = 2.5 x 900 = 2250 L
Answer is b) 2250 L
Number of TPI ( Thread per Inch ) on different size of pipe ? a) 1/16” to 1/8” = __ TPI
b) ¼” to 3/8” = 18 TPI
c) ½” to ¾” = 14 TPI
d) 1” to 2” = 11-1/2” TPI
e) 4” & above = 8 TPI
27
Number of TPI ( Thread per Inch ) on different size of pipe ? a) 1/16” to 1/8” = 27 TPI
b) ¼” to 3/8” = __ TPI
c) ½” to ¾” = 14 TPI
d) 1” to 2” = 11-1/2” TPI
e) 4” & above = 8 TPI
18
Number of TPI ( Thread per Inch ) on different size of pipe ? a) 1/16” to 1/8” = 27 TPI
b) ¼” to 3/8” = 18 TPI
c) ½” to ¾” = __ TPI
d) 1” to 2” = 11-1/2” TPI
e) 4” & above = 8 TPI
14
Number of TPI ( Thread per Inch ) on different size of pipe ? a) 1/16” to 1/8” = 27 TPI
b) ¼” to 3/8” = 18 TPI
c) ½” to ¾” = 14 TPI
d) 1” to 2” = ____TPI
e) 4” & above = 8 TPI
11-1/2”
Number of TPI ( Thread per Inch ) on different size of pipe ? a) 1/16” to 1/8” = 27 TPI
b) ¼” to 3/8” = 18 TPI
c) ½” to ¾” = 14 TPI
d) 1” to 2” = 11.5 TPI
e) 4” & above = __ TPI
8
What is a triple duty valve?
Ans: - One valve body that has a Check Valve, Shut off Valve and Balancing Valve.
What is Radon?
Ans: - Radon is an odourless, colourless gas, invisible that is found in the soil as a naturally occurring product of uranium decay
PVC 3” or 4” pipe used for Radon (gas).
Radon mitigation pipe used from under the basement through the foundation. ( means pipe used from underground to the outside in roof.
When Radon mitigation pipe install, where they install?
Ans: - Below the basement slab ( foundation )
) Some part of harness tier out, what need to do?
a) Repair
b) Give to someone
c) Throw away ( not repair )
Ans:- c) Throw away
Unfiltered ( Hard ) water comes in house, what’s the reason?
Ans: - insufficient salt ( not cleaned properly )
15 lb of water, need to temp change 49 F to 190 F. How many BTU required?
Ans:- need to raise temp = 190 – 49 = 141 F
1 lb to raise 1 F required BTU = 1 BTU
15 lb to raise 1 F required BTU = 1 x 15 = 15 BTU
15 lb to raise 141 F required BTU = 15 x 141 = 2115 BTU
So, 2112 BTU required 15 lb to raise 141 degree Fahrenheit.
Impeller works slow what’s reason?
Ans: - Tank have less pressure
130) Pump not work fully ?
Ans: - tank water logged
Pump need to lift up?
a) Suction line, Suction up
b) Impeller add
Ans: - B) Impeller add
Pump is doing Less Cycling, what’s the reason?
Ans: - Leaking in suction line
3 Zones on 3 storeys, No pressure, no heat anywhere?
Ans: - Expansion tank Failed
134) Why Pump loosing Prime?
a) Plugged suction
b) Leaking Suction
c) Foot valve to low
Ans:- Leaking suction
Minimum supply tube Size ?
Ans: - 3/8”
Minimum inside diameter for supply pipe?
Ans; - 6.3 mm
Copper to cast iron, which fitting used?
Ans: - Di-electric , Mech Coupling
If the cycle of flush valve is long, how we fix that?
Ans: - turn the water screw anti-clock wise
If the cycle of flush valve is short, how we fix that?
Ans: - turn the water screw clock wise.
If the water continuous running on flush valve, what’s the reason?
Ans: - Orifice or Diaphragm blocked/ clogged
New person at work, does not under stand work, what he have to do?
a) Check with supervisor
b) No need to work
c) Clarification from co-work
d) Gives his work to some one else
ans:- confused with a & c
On water feed what install for storage tank?
a) T & P relief valve
b) Expansion tank
Ans: - Expansion tank
How PVC pipe Join?
Ans: - PVC pipe Cut , Bevel,
) Which welding permit required?
Ans: - hot work permit
Chiller need to install, what need with this?
Ans: - buffer tank
Two urinals are dual vented, find the vent size?
Ans: - Urinal washout type = 1.5 fu
2 Urinal washout type = 3FU D
ual Vent = 1-1/4 ( 2.5.7.1 )
