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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. When a loop is needed at any point between ends of a rope - the proper knot to tie is the...
2 3/8'(inch)
take-off must be subtracted from the end-to-center measurement.
bowline on a bight
Increase the pressure when the temperature increases

2. A _______________ reamer should NOT be used with power operated pipe threading equipment
34 feet
.7854 x D squared
Snubber
Spiral

3. What is the specific gravity of water?
The flux is in the filler material
Groove
Eccentric reducers - flat on top
1

4. On a centrifugal pump what is rotated by the motor?
To reduce the pressure from the cylinders to safe and workable pressures
1
Sch 40
The impeller

5. When using a cable come-a-long - what safety device will indicate overloading?
Manometer
1728
Pressure rating
handle will bend

6. What instrument is best for measuring vacuum?
36'(inch)
Green... think KKelly GREEN
Manometer
When a large volume of condensate is generated

7. How do you determine gear ratios?

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8. A triple-duty valve is installed...
1 foot
4 1/2'(inch)
In the hot water heating pumps discharge piping.
14.7psia - always in PSI-A

9. Soldered joints should never be used on systems above...
.433psi
250 degrees
Softens it
Flashing

10. A sling is weakest in which position?
Hydrostatic
.01745 - 3.1416 - and .7854
When a large volume of condensate is generated
Choked position

11. What is the formula to calculate thermal expansion?

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12. There are __________ gallons in a cubic foot.
Spiral
7.48
Raise the load
Expansion = Constant per 100ft multiplied by (Final Temp- Starting Temp) Example: 380' steel pipe (.0305 constant) is heated from 62 degrees to 171 degrees - how much did the pipe expand? Formula: .0305 * 3.8 (171-62) = 3 5/16'(inch)

13. What is the weakest part of a chain hoist?
lower hook
180
Magnesium
The tensile strength of the rod in PSI times 1 -000

14. The only entity that has the responsibility and authority to appoint the competent person is...
handle will bend
200 lbs
galvanized
the employer

15. A device that mechanically attaches to the side of a flange on a beam is called a...
3.1416
Beam clamp
no valves permitted
Softens it

16. OD for 1/2'(inch)

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17. Theoretically - a pump can raise water by suction approximately __________ feet vertically.
zinc
13/16'(inch)
34 feet
the type of coating and current

18. Which one of the following alloys does not require flux when brazing copper to copper joints?
Expansion Device
2 3/8'(inch)
sewage
BCuP - Stands for Brazed Copper Phosphorus

19. What is the welding position 2 - on the electrode mean?
All the way to the shoulder
Eccentric reducers - flat on top
Flat and horizontal positions
Expansion = Constant per 100ft multiplied by (Final Temp- Starting Temp) Example: 380' steel pipe (.0305 constant) is heated from 62 degrees to 171 degrees - how much did the pipe expand? Formula: .0305 * 3.8 (171-62) = 3 5/16'(inch)

20. A concentric reducer could be used to connect to a horizontal pump _______________ line.
pi * radius squared
Discharge
Ground Fault Circuit Interrupter
true isometric

21. What type of Copper tubing is not identified by color on the tubing itself?
soft tempered
Above the main
compression
The tensile strength of the rod in PSI times 1 -000

22. The color code for DWV copper is...
Positive
Remove the packing
When a large volume of condensate is generated
Yellow.. think Dee Double U is yelloWWW

23. The color code for type '(inch)K'(inch) copper is?
Capillary action
Expansion = Constant per 100ft multiplied by (Final Temp- Starting Temp) Example: 380' steel pipe (.0305 constant) is heated from 62 degrees to 171 degrees - how much did the pipe expand? Formula: .0305 * 3.8 (171-62) = 3 5/16'(inch)
protect worker safety and health
Green

24. What type of flame should be used to cut carbon steel?
8 5/8'(inch)
Eccentric reducers - flat on top
Neutral
.433psi

25. The main cause of undercutting is...
Too fast of a travel rate
840
Height * .433 = psig
true isometric

26. Steam condensate lines should be installed on...
dry expansion
Roller hangers
Alloying
Two Hole

27. What causes pressure drop?
Increase in friction
Loosen the far bolts first
pi * radius squared
Guide - Anchor - Guide

28. Exits from a trench 150' long and 4' deep must be located within how many feet of a worker in the trench?
25 feet
.7854 x D squared
36'(inch)
zinc

29. OD for 6'(inch)

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30. When brazing for medical gas or refrigeration always...
The type of coating and current
8.33 pounds
Ground Fault Circuit Interrupter
Purge the line when brazing

31. Which one of the following measures and takes action?
Groove
Its cheaper!
The tensile strength of the rod in PSI times 1 -000
Controller

32. Annealing copper...
Softens it
Globe
Expansion loop.
soft tempered

33. The device that controls the pressure in a low pressure steam boiler is called a...
Pressuretrol
Axis of pipe should be on a 45 degree
To provide movement cause from a change in temperature
The same OD as the branch

34. A system which the refrigerant is in the shell and cools the fluid in the tubes is...
Spring hanger
Flooded
Above the main
9

35. When loosening the bolts on a flange one should...
Loosen the far bolts first
After cutting
Air
falls

36. What is the welding position 1 - on the electrode mean?
4 times
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
The same ID as the branch
All position

37. What size hole should be cut into a main to saddle IN a smaller pipe?
Fuse
The same OD as the branch
Saturated
All the way to the shoulder

38. What does GFCI stand for?
In the direction of flow
After cutting
1728
Ground Fault Circuit Interrupter

39. Which of the following is NOT a reason for using cutting oil when threading pipe?
protect worker safety and health
10 feet
To protect the threads from rust.
Sch 40

40. Which is the correct formula for the area of a circle?
Pneumatics
6 5/8'(inch)
.7854 x D squared
The stud bolt is stronger than a machine bolt of the same size and material.

41. Which of the following constants are used when working with circles and areas?
Arrange a wire rope clamp so that the dead end has the U bolts
Flat position only
.01745 - 3.1416 - and .7854
.625

42. Where should the pressure enter a globe valve?
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)
Hydrostatics
Never
The flow of a liquid into a small space

43. What is the minimum thickness for threading PVC pipe?
Sch 40
Globe
hydrometer
Capillary action

44. The pipe that connects the steam header to the boiler return connection is the...
Quarter
zinc
231
Equalizing line

45. Which component in a closed control loop is the primary element?
To provide movement cause from a change in temperature
MAPP - acetylene - and propane
compression
Sensor

46. You should never blow your clothes off with oxygen because oxygen is a/an
supporter of combustion
Softens it
hydrometer
Not to scale - does not show locations of equipment. It shows pipe size and flow.

47. Ladders with visible defects - such as broken rungs - cracked side rails - or broken steps must be...
Mechanical return is used.
maximum rated capacity
ALWAYS
Tagged and removed from service.

48. What does a condenser do?
Red.. think M&M is RED
Expansion loop.
To allow for thermal movement
On high side of the system and turns gas to liquid.

49. In a typical residential air conditioning system - the evaporator is of the _______________ type - where the liquid refrigerant should be totally vaporized before it reaches the outlet of the evaporator.
Dry expansion type
Remove the packing
200 lbs
15 PSI

50. To determine the travel for a 45 degree rolling offset you would...
Multiply the length of the hypotenuse of the roll and the set by 1.414
radius squared times PI
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
Condensate pump size