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. When gripping a pipe with a pipe wrench - the wrench should be adjusted so the pipe is...
Air
near the middle of the jaws
Softener
Basket

2. When changing pipe sizes in the horizontal supply or return lines of a two-pipe hot water heating system use...
West of the building
Eccentric reducers - flat on top
Raise the load
25 feet

3. Momentarily closing the starting switch to check the rotation of the pump is known as __________ the pump.
Center of the pipe
Level the 90 in horizontal position determine inside arc - backside arc and face to center dimensions for 60 degree elbow - mark and cut
Valve
Bumping

4. An oil separator is required on systems using...
The pump creates a differential in pressure that moves the water.
Ammonia
Absolute
sewage

5. What is the purpose of the oxygen and acetylene regulators?
To reduce the pressure from the cylinders to safe and workable pressures
Ground Fault Circuit Interrupter
Valve
.01745 - 3.1416 - and .7854

6. Steam condensate lines should use...
Its cheaper!
13/16'(inch)
Sch 80 Steel pipe
Choked position

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

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8. Oil is used on a pipe machine to...
bowline on a bight
231
Neutral
cool and lubricate the die

9. Guides are used near...
Anchors
Absolute
Argon
NEVER!

10. What is the minimum thickness for threading PVC pipe?
Sch 40
The impeller
.7854 x D squared
9

11. What temperature does water boil at sea level?
212 degrees F
Saturated
9
the type of coating and current

12. Horizontal steam supply piping should be reduced in size by using...
Eccentric reducer (flat on top)
10 feet
.075lbs
A pry bar

13. OD for 1/2'(inch)

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14. Formula for a cubic foot of an unknown substances weight?
Ball joint - Bellows Joint and Packed Joint
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
Expansion loop.
discharge

15. Where should the high pressure condensate be piped to before entering the receiver?
Two Hole
Flash Tank
The system temperature - thermal and dynamic movement of the pipe and vibration.
Groove

16. What is the main reason for the taper on a pipe thread?
Insure progressively tighter fit
steam and condensate flowing in the same direction
Schedule 10
.01745 - 3.1416 - and .7854

17. When should a person designated as an attendant attempt to rescue a worker that is trapped?
Pressure Rating
10 feet
BCuP - Stands for Brazed Copper Phosphorus
Never

18. OD for 6'(inch)

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19. Which way should the bevel face on an orifice plate?
Sch 80 Steel pipe
.707 x Travel
8 5/8'(inch)
Down Stream

20. What type of Copper tubing is not identified by color on the tubing itself?
soft tempered
Level the 90 in horizontal position determine inside arc - backside arc and face to center dimensions for 60 degree elbow - mark and cut
8.33 pounds
180

21. What is on the low side of the vapor compression cycle?
Eccentric reducers - flat on top
Yellow.. think Dee Double U is yelloWWW
The Evaporator
Arrange a wire rope clamp so that the dead end has the U bolts

22. Soldered joints should never be used on systems above...
250 degrees
compression
The science of heat transfer using water.
62.4

23. The color code for DWV copper is...
On high side of the system and turns gas to liquid.
Point at the base and sweep the base with the extinguisher
1 foot
Yellow.. think Dee Double U is yelloWWW

24. When a loop is needed at any point between ends of a rope - the proper knot to tie is the...
Not to scale - does not show locations of equipment. It shows pipe size and flow.
Prevailing wind speed and direction - environmental concerns - zoning requirements
bowline on a bight
.707

25. The letters MSDS stand for...
The stud bolt is stronger than a machine bolt of the same size and material.
4 1/2'(inch)
Material Safety Data Sheet
Argon

26. In a Hydronic heating system - units at the top of the system not heating are likely to be...
Dog Everything
Before the strainer and fully open.
Flux
Air Bound

27. There are __________ gallons in a cubic foot.
7.48
Fusion
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)
Hydrostatic

28. Why is it necessary to use flux on a soldered joint?
To chemically prepare the pieces for soldering
.01745 - 3.1416 - and .7854
Condensate pump size
62.4lbs

29. What causes pressure drop?
Green... think KKelly GREEN
Hydrostatic
Increase in friction
The same ID as the branch

30. A float and thermostatic trap is a...
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
Mechanical/Thermostatic
Flooded
Pneumatics

31. Zinc chills or metal fume fever are caused from welding on __________ steel.
galvanized
1.5
Insufficient condensate drainage
4 1/2'(inch)

32. To view the west elevation the viewer's perspective is from the...
The stud bolt is stronger than a machine bolt of the same size and material.
West of the building
Ball joint - Bellows Joint and Packed Joint
Axis of pipe should be on a 45 degree

33. 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
discharge
Continuously
.01745 - 3.1416 - and .7854

34. What should be done first when preparing a copper joint?
7.48
Clean all surfaces
Two Hole
5 9/16'(inch)

35. The type of drawing that most closely resembles an object as the eye would see it is referred to as a/an __________ drawing.
Forced convection - because the FAN forces convection!
In a pressure gauge
Hydrostatics
true isometric

36. A vertical line in an isometric drawing represents...
the core
Down Stream
Fuse
Up and Down

37. The type of valve permitted downstream of a temperature and pressure relief valve on a water heater is...
pi * radius squared
250 degrees
no valves permitted
The pump creates a differential in pressure that moves the water.

38. 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.
Increase the pressure when the temperature increases
8.33lbs
Guide - Anchor - Guide
840

39. Which one of the following measures and takes action?
Loosen the far bolts first
Controller
zinc
.491lbs

40. Which of the following is NOT a reason for using cutting oil when threading pipe?
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
30 Degrees
Sensor
To protect the threads from rust.

41. What is the welding position 3 - on the electrode mean?
1/2 BTU
In the hot water heating pumps discharge piping.
Flat position only
The science of heat transfer using water.

42. Which of the following constants are used when working with circles and areas?
.01745 - 3.1416 - and .7854
A pry bar
Large volumes of condensate flash back to liquid in the tank so it removes trapped steam from the condensate.
Flux

43. Where is a bourdon tube found?
Flat position only
Before the strainer and fully open.
In a pressure gauge
Conduction - convection and radiant.

44. What is the function of the covering on the electrodes during the process of '(inch)Shielded Metal Arc Welding'(inch)?
Provide oxygen barrier - stabilize and direct the force of the arc and to gather impurities in the form of slag.
The flux burns and the joint becomes ineffective
2.31ft
8 5/8'(inch)

45. Calculate head pressure in a section of vertical pipe?
100% of the rated capacity
The tensile strength of the rod in PSI times 1 -000
steam and condensate flowing in the same direction
Height * .433 = psig

46. What is the minimum safe clearance between cranes and energized power lines operating at 50kV or below?
Hydraulics
Its cheaper!
10 feet
Alloying

47. Steam in contact with the water it has been generated from is known as ________________ steam.
Beam clamp
piping
All position
Saturated

48. The density of 1 cubic inch of Mercury is...
NEVER!
Solder joints
Prevailing wind speed and direction - environmental concerns - zoning requirements
.491lbs

49. One pound of water pressure is equal to...
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
2.31ft
Red.. think M&M is RED
Mechanical/Thermostatic

50. The color code for ACR copper is...
Crimson... think aCRimson
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
West of the building
falls