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 condensate receiver is used when...
Flat and horizontal positions
supporter of combustion
take-off must be subtracted from the end-to-center measurement.
When a large volume of condensate is generated

2. The color code for ACR copper is...
212 degrees F
Crimson... think aCRimson
On low side of the system and expands liquid to low pressure gas.
Remove the packing

3. When loosening the bolts on a flange one should...
All position
1 5/16'(inch)
Erratic readings
Loosen the far bolts first

4. To determine the travel for a 45 degree rolling offset you would...
Its cheaper!
Height * .433 = psig
Multiply the length of the hypotenuse of the roll and the set by 1.414
Sch 40

5. Which of the following is NOT a reason to use stud bolts instead of machine bolts for bolting flanged piping joints?
The stud bolt is stronger than a machine bolt of the same size and material.
Center of the pipe
Red.. think M&M is RED
The flow of a liquid into a small space

6. The type of drawing that most closely resembles an object as the eye would see it is referred to as a/an __________ drawing.
The Evaporator
true isometric
no valves permitted
Air

7. One gallon of water weighs?
The stud bolt is stronger than a machine bolt of the same size and material.
8.33 pounds
4 to 20 milliamps
radius squared times PI

8. What type of expansion joint does NOT utilize mechanical movement?
compression
Expansion loop.
hydrometer
None

9. All of the following are process control elements EXCEPT...
piping
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
Remove any paint or rust.
Snubber

10. What is the purpose of the oxygen and acetylene regulators?
To reduce the pressure from the cylinders to safe and workable pressures
In the hot water heating pumps discharge piping.
Primer
Capillary action

11. Capillary action is used in...
Mechanical return is used.
Solder joints
Point thumb up
Climbing the cross braces.

12. A concentric reducer could be used to connect to a horizontal pump _______________ line.
Ammonia
Cavitation
Insufficient condensate drainage
Discharge

13. Which of the following types of copper tube has the smallest wall thickness?
The flow of a liquid into a small space
DWV
In a pressure gauge
Magnesium

14. What is the maximum pressure for an acetylene hose?
Insert pipe into fitting and turn 1/4 turn and hold
15 PSI
.707
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.

15. The final step in the galvanizing of pipe is to dip the pipe into a bath of molten _________?
1.25'(inch)
zinc
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
Loosen the far bolts first

16. Which way should the bevel face on an orifice plate?
Down Stream
Loosen the far bolts first
1.5
Fuel - Heat - Oxygen

17. What is installed after the isolation valve and before the trap union on a standard trap assembly?
1 5/16'(inch)
.625
Strainer
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)

18. Steam condensate lines should be installed on...
62.4
On low side of the system and expands liquid to low pressure gas.
Globe
Roller hangers

19. Which of the elements of a wire rope aid in absorbing '(inch)Shock Loads'(inch)?
Insert pipe into fitting and turn 1/4 turn and hold
steel to copper joints
the core
Dog Everything

20. Which of the following is NOT acceptable as part of a personal fall arrest system?
14.7 psia
Body belts
cool and lubricate the die
231

21. A rating of 300# refers to a flange's...
Pressure Rating
Capillary action
Coating
Segmental

22. 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...
Capillary action
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.
In the hot water heating pumps discharge piping.
Pipe strain

23. A system which the refrigerant is in the shell and cools the fluid in the tubes is...
Up and Down
1.25'(inch)
Capillary action
Flooded

24. When is it safe to remove the old packing from a valve that is under pressure?
NEVER!
Vaporization
ALWAYS
Bumping

25. What is the standard pressure range for a pneumatic signal?
MAPP - acetylene - and propane
A pry bar
Magnesium
3 to 15 psi

26. If a pump is operating under static suction lift conditions - a __________ may be installed in the suction line to avoid losing the pump's prime each time the pump shuts off.
(Total Height - Elevation) * .433 = psig
Waterlogged
Pressure rating
foot valve

27. Why is it necessary to use roller hangers?
To allow for thermal movement
None
The same OD as the branch
Primer

28. Calculate head pressure in a section of vertical pipe?
Green... think KKelly GREEN
Set point
the core
Height * .433 = psig

29. When using a cable come-a-long - what safety device will indicate overloading?
Dry expansion type
9
Beam clamp
handle will bend

30. How much heat is required to raise 1/2 pound of water 1 degree F?
NEVER!
To protect the threads from rust.
The system temperature - thermal and dynamic movement of the pipe and vibration.
1/2 BTU

31. A triple-duty valve is installed...
231
falls
In the hot water heating pumps discharge piping.
Climbing the cross braces.

32. A concentric reducer could be used to connect to a horizontal pump _______________ line.
orthographic
discharge
Arrange a wire rope clamp so that the dead end has the U bolts
Expansion loop.

33. For an extension ladder to be at the correct angle for safe use on a working surface 20ft high. The ladder must be located how many feet away from the base?
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
In the hot water heating pumps discharge piping.
15 Feet
.01745 - 3.1416 - and .7854

34. How far should a copper tube be inserted into a cup for a brazed joint?
75 degrees - also 4 to 1
Eccentric reducer (flat on top)
the type of coating and current
All the way to the shoulder

35. The last digit on a welding electrode refers to the __________ of the electrode.
Coating
3 1/2'(inch)
.0361
To reduce the pressure from the cylinders to safe and workable pressures

36. What is the welding position 1 - on the electrode mean?
Choked position
3.1416
Large volumes of condensate flash back to liquid in the tank so it removes trapped steam from the condensate.
All position

37. An abrasive wheel should never run faster than it...
Expansion Device
Loosen the far bolts first
maximum rated capacity
The system temperature - thermal and dynamic movement of the pipe and vibration.

38. If a horizontal pipe connecting to the suction side of a pump requires a reducer - it should be connected with...
foot valve
Argon
an eccentric reducer flat on top
.0361

39. To sense the temperature remotely from the thermostat location you would use...
.491lbs
Remote bulb
62.4 pounds
Body belts

40. What is typically a final control element?
Vaporization
Valve
Dog Everything
.0361

41. What type of expansion joint utilizes mechanical movement?
.075lbs
Ball joint - Bellows Joint and Packed Joint
Protection for loss of water in the boiler.
Increase in friction

42. How much does 1 cubic foot of air weigh?
Air Bound
Immersion sensor
.075lbs
Notify response team and allow them to rescue.

43. What causes pressure drop?
Increase in friction
return fitting
15 PSI
Neutral

44. When gripping a pipe with a pipe wrench - the wrench should be adjusted so the pipe is...
no valves permitted
4 to 20 milliamps
near the middle of the jaws
Up and Down

45. The sum of atmospheric and gauge pressure is known as __________ pressure.
Increase in friction
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.
Absolute
15 Feet

46. The amount of heat necessary bring about a change of state from solid to liquid or liquid to gas is known as _______________ heat.
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.
Pressuretrol
Latent
250 degrees

47. When brazing for medical gas or refrigeration always...
the type of coating and current
Schedule 10
The impeller
Purge the line when brazing

48. Which type of orifice plate is designed to measure flow of liquids containing solids?
Segmental
Capillary action
Increase in friction
34 feet

49. In the cooling cycle - which component throttles the flow of refrigerant?
compression
Expansion Device
Center of the pipe
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)

50. A dielectric fitting should be used on...
The flow of a liquid into a small space
Insufficient condensate drainage
steel to copper joints
Snubber