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. A rating of 150# refers to a flange's...
.625
2 and 1
Pressure rating
4 1/2'(inch)

2. The color code for DWV copper is...
Large end to smaller end to center(bull)
To allow for thermal movement
Groove
Yellow.. think Dee Double U is yelloWWW

3. The control point adjustment on a receiver is used to change the _______________.
sewage
set point
Mechanical return is used.
Flooded

4. The type of drawing that views a building by looking directly at the front - top and side is referred to as a/an ___________ drawing.
Beam clamp
orthographic
Absolute
Hydrostatics

5. To determine the set on a 45 degree offset you would multiply the travel by...
Air
Dry expansion type
Mechanical return is used.
.707

6. A simple example of a lever is...
A pry bar
Neutral
1 5/16'(inch)
3.1416

7. A dielectric fitting should be used on...
Magnesium
steel to copper joints
foot valve
Quarter

8. How often should the atmosphere be tested in a confined space?
The flux is in the filler material
Continuously
Positive
Steam

9. What effect does the fill pressure (static) have on a closed loop plumbing system?
The stud bolt is stronger than a machine bolt of the same size and material.
None
Vaporization
BUT

10. What is the welding position 2 - on the electrode mean?
1728
Flat and horizontal positions
Air
The type of coating and current

11. The purpose of the foot switch on a power-operated pipe cutting and threading machine is to?

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12. An exit from a trench should be no more than...

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13. A float and thermostatic trap is a...
Mechanical/Thermostatic
Beam clamp
Insure progressively tighter fit
Above the main

14. Why is it necessary to use flux on a soldered joint?
To chemically prepare the pieces for soldering
Clove hitch with a half hitch
Allow moisture to escape
Green... think KKelly GREEN

15. A valve on the suction side of the pump should be...
Prevailing wind speed and direction - environmental concerns - zoning requirements
Increase
Before the strainer and fully open.
Pressuretrol

16. What should be done first when preparing a copper joint?
Clean all surfaces
compression
5 9/16'(inch)
.491lbs

17. When selecting a hanger for a piping system you should consider...
The system temperature - thermal and dynamic movement of the pipe and vibration.
Green
Tagged and removed from service.
25' from any worker

18. What is the best valve for throttling?
Level the 90 in horizontal position determine inside arc - backside arc and face to center dimensions for 60 degree elbow - mark and cut
Globe
Axis of pipe should be on a 45 degree
100% of the rated capacity

19. When a liquid changes immediately to a vapor it is called...
Alloying
Flashing
Pressuretrol
Point at the base and sweep the base with the extinguisher

20. A gallon of water weighs...
The same ID as the branch
The stud bolt is stronger than a machine bolt of the same size and material.
4 1/2'(inch)
8.33lbs

21. Steam in contact with the water it has been generated from is known as ________________ steam.
5 9/16'(inch)
Pipe penetration
Flooded
Saturated

22. What should the outside attendant do to rescue a worker who shows physiological effects of exposure in a confined space?
.707
Expansion Device
Basket
Notify response team and allow them to rescue.

23. What are the three types of steam traps?
Capillary action
Thermostatic - Thermodynamic and Mechanical
.01745 - 3.1416 - and .7854
an eccentric reducer flat on top

24. With a high pressure valve you should never _____ under pressure.
Eccentric reducer (flat on top)
10 feet
Spiral
Remove the packing

25. How much does 1 cubic foot of air weigh?
To reduce the pressure from the cylinders to safe and workable pressures
zinc
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
.075lbs

26. The amount of heat necessary bring about a change of state from solid to liquid or liquid to gas is known as _______________ heat.
Ammonia
Latent
Raise the load
Clove hitch with a half hitch

27. What is typically a final control element?
Expansion Device
Bight - running end and standing part
Valve
Protection for loss of water in the boiler.

28. When should a person designated as an attendant attempt to rescue a worker that is trapped?
Down Stream
Softens it
Increase the pressure when the temperature increases
Never

29. Exits from a trench 150' long and 4' deep must be located within how many feet of a worker in the trench?
Too fast of a travel rate
62.4 pounds
the employer
25 feet

30. What does a condenser do?
Flat and horizontal positions
Insufficient condensate drainage
Flash Tank
On high side of the system and turns gas to liquid.

31. When is it safe to remove the old packing from a valve that is under pressure?
NEVER!
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)
Expansion loop.
Down Stream

32. What causes water to move in a Hydronic system?
The tubing has been cleaned for oxygen service
The pump creates a differential in pressure that moves the water.
Solder joints
The science of heat transfer using water.

33. What is installed after the isolation valve and before the trap union on a standard trap assembly?
Green... think KKelly GREEN
Strainer
Snubber
Air

34. One foot of water exerts...
Not to scale - does not show locations of equipment. It shows pipe size and flow.
.433psi
25 feet
lower hook

35. Use of air as a power source is known as...
Eccentric reducers - flat on top
.0361
Fuse
Pneumatics

36. To raise the boom of a crane you would...
Remote bulb
25' from any worker
Point thumb up
The tensile strength of the rod in PSI times 1 -000

37. The symbol for pi is equivalent to...
Steam
Blue... think b-LLLLue
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
3.1416

38. A _______________ reamer should NOT be used with power operated pipe threading equipment
Spiral
Down Stream
Climbing the cross braces.
Bumping

39. The final step in the galvanizing of pipe is to dip the pipe into a bath of molten _________?
Solder joints
zinc
Mechanical/Thermostatic
Flashing

40. There are __________ gallons in a cubic foot.
Waterlogged
zinc
7.48
Clove hitch with a half hitch

41. In a refrigeration system a condensable gas is...
Ammonia
near the middle of the jaws
the core
Never

42. OD for 1'(inch)

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43. Which of the following is an essential element necessary to produce an ordinary fire?
Capillary action
A pry bar
Fuel - Heat - Oxygen
Green

44. When brazing for medical gas or refrigeration always...
Loosen the far bolts first
dry expansion
2 3/8'(inch)
Purge the line when brazing

45. If you double pipe size the carrying capacity is increased...
pi * radius squared
4 times
Condensate pump size
62.4

46. The function of a steam trap is to prevent the flow of ________________ - while allowing condensate and non-condensable gases to pass through.
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)
Ammonia
Expansion Device
Steam

47. The smallest nominal size DWV copper tube is...

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48. Formula for area of a circle?
pi * radius squared
cool and lubricate the die
Not to scale - does not show locations of equipment. It shows pipe size and flow.
25 feet

49. What is the purpose of the expansion joint in a steam system?
Groove
no valves permitted
Flux
To provide movement cause from a change in temperature

50. Although the model codes usually say the melting point of a brazing alloy must be at least 1000º F - the technical temperature specified by the Copper Development Association and the American Welding Society is __________ degrees Fahrenheit.
Fuse
Protection for loss of water in the boiler.
840
All the way to the shoulder