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Plumbing Certification

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Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. The function of a steam trap is to prevent the flow of ________________ - while allowing condensate and non-condensable gases to pass through.
Prevailing wind speed and direction - environmental concerns - zoning requirements
Steam
Sch 80 Steel pipe
Flux

2. When a flux joint is overheated it will not...
840
34 feet
Fuse
Latent

3. A thermostatic steam trap that fails in the closed position would cause a heating unit to become...
212 degrees F
Waterlogged
5 9/16'(inch)
Allow moisture to escape

4. The pipe that connects the steam header to the boiler return connection is the...
Equalizing line
pi * radius squared
180
The same OD as the branch

5. A float and thermostatic trap is a...
Alloying
2 3/8'(inch)
Mechanical/Thermostatic
Type K

6. Which one of the following measures and takes action?
Bumping
Too fast of a travel rate
Controller
Pneumatics

7. In a refrigeration system a condensable gas is...
62.4
DWV
Primer
Ammonia

8. Which of the elements of a wire rope aid in absorbing '(inch)Shock Loads'(inch)?
8 5/8'(inch)
Raise the load
the core
2nd gear divided by primary gear. Example: A machine has a primary pulley of 6'(inch) and a secondary pulley of 24'(inch). Formula is 24/6=4 - so the ratio is 4 to 1

9. A guard rail system must withstand a minimum force of __________ pounds.
200 lbs
34 feet
In the direction of flow
MAPP - acetylene - and propane

10. What is on the low side of the vapor compression cycle?
The Evaporator
Ammonia
200 lbs
Manometer

11. Which of the following is an essential element necessary to produce an ordinary fire?
The same ID as the branch
1 foot
Fuel - Heat - Oxygen
Insufficient condensate drainage

12. What should be done first when preparing a copper joint?
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)
take-off must be subtracted from the end-to-center measurement.
Clean all surfaces
75 degrees - also 4 to 1

13. What is the sum of all angles in a triangle?
None
180
orthographic
Valve

14. What does the stamp Oxy-Med stand for on copper tubing?
The tubing has been cleaned for oxygen service
10 feet
Air Bound
piping

15. When a liquid changes immediately to a vapor it is called...
Pipe penetration
Forced convection - because the FAN forces convection!
Flashing
Choked position

16. Which way should the bevel face on an orifice plate?
Equalizing line
.7854 x D squared
Down Stream
1 foot

17. A fan coil uses ______ to distribute heating or cooling to the space.
Forced convection - because the FAN forces convection!
Raise the load
To allow for thermal movement
Climbing the cross braces.

18. If you double pipe size the carrying capacity is increased...
no valves permitted
4 times
Protection for loss of water in the boiler.
Dry expansion type

19. Calculate head pressure in a section of vertical pipe?
Capillary action
Anchors
Height * .433 = psig
To provide movement cause from a change in temperature

20. A concentric reducer could be used to connect to a horizontal pump _______________ line.
tangent 1/2 angle x radius
10 feet
foot valve
discharge

21. A tag line should be used on a crane lift...
ALWAYS
soft tempered
In the direction of flow
Center of the pipe

22. Steam supply using parallel flow is...
Snubber
Forced convection - because the FAN forces convection!
steam and condensate flowing in the same direction
Not to scale - does not show locations of equipment. It shows pipe size and flow.

23. OD for 6'(inch)

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24. Before attaching regulators to an oxygen cylinder...
BCuP - Stands for Brazed Copper Phosphorus
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.
blow the valves for a moment
Fuel - Heat - Oxygen

25. What type of expansion joint does NOT utilize mechanical movement?
set point
Expansion loop.
Set point
Controller

26. Which of the following methods of access to a scaffold is prohibited?
1.5
Strainer
Climbing the cross braces.
Two Hole

27. What type of expansion joint utilizes mechanical movement?
1.25'(inch)
Ball joint - Bellows Joint and Packed Joint
Remove any paint or rust.
BUT

28. When brazing for medical gas or refrigeration always...
Purge the line when brazing
212 degrees F
take-off must be subtracted from the end-to-center measurement.
Sch 40

29. The last digit on a welding electrode refers to the __________ of the electrode.
8.33lbs
6 5/8'(inch)
Coating
supporter of combustion

30. What type of hanger uses a spring that splits the rod?
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)
Snubber
Magnesium
Spring hanger

31. What is the formula to calculate thermal expansion?

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32. What is the best gasket to use on a flanged joint on medium pressure steam?
orthographic
ALWAYS
pi * radius squared
Spiral Wound

33. What size hole should be cut into a main to saddle IN a smaller pipe?
Ammonia
The same OD as the branch
pi * radius squared
Divide the diameter by half 4 times - put the 2nd and 4th number together to get the answer. Example - 6'(inch) 45 would be - 6 - 3 - 1 1/2 and 3/4. Answer 3 3/4'(inch)

34. What type of flame should be used to cut carbon steel?
Neutral
Positive
The science of heat transfer using water.
Alloying

35. To view the west elevation the viewer's perspective is from the...
Waterlogged
Axis of pipe should be on a 45 degree
Point at the base and sweep the base with the extinguisher
West of the building

36. To sense the temperature remotely from the thermostat location you would use...
Remote bulb
.491lbs
Multiply the specific weight by the weight of 1 cubic foot of water which is 62.4lbs. Specific weight x 62.4 = 1 cu ft weight. Example: Specific weight = 4.8 - 4.8 * 62.4 = 299lbs per cu ft
Latent

37. A concentric reducer could be used to connect to a horizontal pump _______________ line.
Discharge
Solder joints
3 1/2'(inch)
7.0

38. In a Hydronic heating system - units at the top of the system not heating are likely to be...
Green
Strainer
Air Bound
return fitting

39. One gallon of water weighs?
8.33 pounds
14'(inch)
Hydraulics
Groove

40. There are __________ gallons in a cubic foot.
The flux is in the filler material
Tagged and removed from service.
10 feet
7.48

41. A sling is weakest in which position?
Tagged and removed from service.
falls
1.5
Choked position

42. The ______ is used to protect the weld puddle from contamination in the SMAW process.
Flux
maximum rated capacity
Notify response team and allow them to rescue.
return fitting

43. When loosening the bolts on a flange one should...
.491lbs
Spiral
Loosen the far bolts first
Ammonia

44. The pressure exerted by a liquid at rest is...
When a large volume of condensate is generated
The same OD as the branch
Hydrostatic
Absolute

45. The amount of heat it takes to raise one pound of water one degree Fahrenheit is known as a...
BUT
Arrange a wire rope clamp so that the dead end has the U bolts
zinc
Flat position only

46. What does GFCI stand for?
Green
Ground Fault Circuit Interrupter
Magnesium
Cavitation

47. When should a person designated as an attendant attempt to rescue a worker that is trapped?
Globe valve
Neutral
Never
.707 x Travel

48. Ladders with visible defects - such as broken rungs - cracked side rails - or broken steps must be...
Waterlogged
Tagged and removed from service.
Anchors
BUT

49. A dielectric fitting should be used on...
Body belts
Blue... think b-LLLLue
Spiral Wound
steel to copper joints

50. The pipe fitting that makes a 180 degree turn is called a/an?
handle will bend
tangent 1/2 angle x radius
return fitting
zinc

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Plumbing Certification

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