Test your basic knowledge |

Plumbing Certification

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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. What instrument is best for measuring vacuum?
Manometer
Body belts
Flux
NEVER!

2. The change in state from solid to liquid is known as...
Fusion
Provide oxygen barrier - stabilize and direct the force of the arc and to gather impurities in the form of slag.
Two Hole
14'(inch)

3. A mixing valve has ___ inlets and ___ outlets.
Forced convection - because the FAN forces convection!
5 9/16'(inch)
Primer
2 and 1

4. A rating of 300# refers to a flange's...
Pressure Rating
Segmental
the employer
Condensate pump size

5. What is the best gasket to use on a flanged joint on medium pressure steam?
Flashing
The flux is in the filler material
Hydraulics
Spiral Wound

6. In a refrigeration system a condensable gas is...
The tubing has been cleaned for oxygen service
true isometric
3 to 15 psi
Ammonia

7. An ejector pump is typically used to pump __________.
.7854 x D squared
sewage
Flat position only
Air

8. The pipe size of a pipe changes from the ID to the OD on what pipe size?

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9. The combining of more than one metal is...
To protect the threads from rust.
10 feet
Alloying
set point

10. What size hole should be cut into a main to saddle IN a smaller pipe?
The pump creates a differential in pressure that moves the water.
Allow moisture to escape
The same OD as the branch
Protection for loss of water in the boiler.

11. An increase in pressure will cause the boiling point of water to ________...
The Evaporator
Fusion
Increase
.625

12. Which of the elements of a wire rope aid in absorbing '(inch)Shock Loads'(inch)?
the core
After cutting
The flux is in the filler material
OD

13. How high must you extend a ladder above the roof or deck?

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14. Calculate head pressure of a vertical pipe at specific elevations.
Expansion loop.
(Total Height - Elevation) * .433 = psig
steel to copper joints
In the hot water heating pumps discharge piping.

15. The maximum practical suction lift on positive displacement pumps is 22 feet and on centrifugal pumps it is __________ feet.
15 Feet
With the weld at a 45 degree angle
Expansion loop.
Air Bound

16. Where should the high pressure condensate be piped to before entering the receiver?
Softens it
In the hot water heating pumps discharge piping.
Remote bulb
Flash Tank

17. To view the west elevation the viewer's perspective is from the...
Above the main
BUT
West of the building
1:48 - because 1/4 of an inch is 1/48th of a foot

18. What type of copper tubing joint requires use of a ferrule?
return fitting
compression
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.
Latent

19. The amount of heat necessary bring about a change of state from solid to liquid or liquid to gas is known as _______________ heat.
the employer
Anchors
Latent
Increase

20. A float and thermostatic trap is a...
Conduction - convection and radiant.
15 Feet
8.33 pounds
Mechanical/Thermostatic

21. Where should the pressure enter a globe valve?
MAPP - acetylene - and propane
1 5/16'(inch)
15 PSI
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)

22. A single line drawing of a piping system represents the...
Air
Hydrostatics
.135 cu ft
Center of the pipe

23. A valve on the suction side of the pump should be...
3 to 15 psi
Flux
Before the strainer and fully open.
Height * .433 = psig

24. When selecting a hanger for a piping system you should consider...
.625
Large end to smaller end to center(bull)
bowline on a bight
The system temperature - thermal and dynamic movement of the pipe and vibration.

25. To assemble a 4 bolt flange...
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
Globe valve
Ammonia
Loosen the far bolts first

26. If the architectural scale is 1/4'(inch) equals 1 foot - the ratio would be...
.01745 - 3.1416 - and .7854
Coating
1:48 - because 1/4 of an inch is 1/48th of a foot
Insure progressively tighter fit

27. What type of sensor is directly in the process stream?
The system temperature - thermal and dynamic movement of the pipe and vibration.
falls
In the hot water heating pumps discharge piping.
Immersion sensor

28. When is it safe to remove the old packing from a valve that is under pressure?
NEVER!
The science of heat transfer using water.
Positive
(Total Height - Elevation) * .433 = psig

29. OD for 1/2'(inch)

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30. A bushing is NOT a good replacement for a reducer because...
.433psi
Its cheaper!
Pressuretrol
The impeller

31. A direct acting thermostat is used to...
Increase the pressure when the temperature increases
All position
Waterlogged
compression

32. The symbol for pi is equivalent to...
212 degrees F
3.1416
10 feet
The flow of a liquid into a small space

33. What causes pressure drop?
3 1/2'(inch)
2 and 1
Increase in friction
Eccentric reducer (flat on top)

34. To fabricate a 60 degree elbow from a 90 you would...
Choked position
Level the 90 in horizontal position determine inside arc - backside arc and face to center dimensions for 60 degree elbow - mark and cut
near the middle of the jaws
Vaporization

35. To order a reducing tee you should specify the size by...
Cavitation
2.31ft
Conduction - convection and radiant.
Large end to smaller end to center(bull)

36. There are __________ cubic inches in a gallon.
radius squared times PI
Clean all surfaces
Absolute
231

37. Both soldered and brazed joints are made by heating a properly prepared joint to the proper temperature and the flowing of a filler metal by means of...
Mechanical/Thermostatic
231
Capillary action
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.

38. Which rigging configuration has the greatest sling strength?
Basket
Equalizing line
true isometric
Pipe strain

39. A sling is weakest in which position?
Choked position
Spring hanger
30 Degrees
Its cheaper!

40. The final step in the galvanizing of pipe is to dip the pipe into a bath of molten _________?
zinc
62.4lbs
.491lbs
Neutral

41. Zinc chills or metal fume fever are caused from welding on __________ steel.
8.33 pounds
set point
Eccentric reducer (flat on top)
galvanized

42. When a soldered joint is overheated...
With the weld at a 45 degree angle
The flux burns and the joint becomes ineffective
near the middle of the jaws
36'(inch)

43. An oil separator is required on systems using...
Ammonia
Alloying
Raise the load
Multiply the length of the hypotenuse of the roll and the set by 1.414

44. A guard rail system must withstand a minimum force of __________ pounds.
200 lbs
Pneumatics
4 to 20 milliamps
Red.. think M&M is RED

45. A vertical line in an isometric drawing represents...
Up and Down
Green... think KKelly GREEN
The impeller
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)

46. What does the term '(inch)never saddle a dead horse'(inch) mean?
Quarter
The tensile strength of the rod in PSI times 1 -000
supporter of combustion
Arrange a wire rope clamp so that the dead end has the U bolts

47. When a flux joint is overheated it will not...
Green
Center of the pipe
100% of the rated capacity
Fuse

48. OD for 3'(inch)

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49. Which one of the following measures and takes action?
.0361
Raise the load
Controller
Spring hanger

50. One foot of water exerts...
A pry bar
Blue... think b-LLLLue
.433psi
blow the valves for a moment