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. 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...
Eccentric reducer (flat on top)
Its cheaper!
Capillary action
Waterlogged

2. What is Hydronics?
10 feet
1 foot
The science of heat transfer using water.
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.

3. Which of the following is an essential element necessary to produce an ordinary fire?
Red.. think M&M is RED
Fuel - Heat - Oxygen
The tubing has been cleaned for oxygen service
Material Safety Data Sheet

4. The change in state from a liquid to gas is known as...
discharge
galvanized
Vaporization
Capillary action

5. A concentric reducer could be used to connect to a horizontal pump _______________ line.
.707
Discharge
Alloying
Spiral Wound

6. What effect does the fill pressure (static) have on a closed loop plumbing system?
None
1
Hydraulics
The type of coating and current

7. What is the minimum thickness for threading PVC pipe?
Forced convection - because the FAN forces convection!
radius squared times PI
Sch 40
Air

8. What are the three types of steam traps?
Type K
Thermostatic - Thermodynamic and Mechanical
8 5/8'(inch)
Eccentric reducers - flat on top

9. Soldered joints should never be used on systems above...
tangent 1/2 angle x radius
Neutral
250 degrees
Vaporization

10. What is installed after the isolation valve and before the trap union on a standard trap assembly?
Axis of pipe should be on a 45 degree
Raise the load
180
Strainer

11. A condensate receiver is used when...
Multiply the length of the hypotenuse of the roll and the set by 1.414
A pry bar
When a large volume of condensate is generated
8.33lbs

12. The density of water is...
Forced convection - because the FAN forces convection!
62.4
Two Hole
15 Feet

13. 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.
Vaporization
4 1/2'(inch)
Dry expansion type
falls

14. What is the formula to calculate thermal expansion?

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15. .433 psig is equal to how high of a water column?
Roller hangers
1 foot
The temperature that the joints are made - the flux and temperatures of the system
1.5

16. What is not a requirement to size the steam trap on a heating unit?
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.
Eccentric reducers - flat on top
Saturated
Condensate pump size

17. A bushing is NOT a good replacement for a reducer because...
Its cheaper!
Steam
With the weld at a 45 degree angle
Segmental

18. Which of the following is a key element of a comprehensive safety and health program?
Remove any paint or rust.
tangent 1/2 angle x radius
Hazard prevention and control.
100% of the rated capacity

19. Why can flux be omitted in a brazed joint?
The flux is in the filler material
Up and Down
Water
.075lbs

20. What is the purpose of the oxygen and acetylene regulators?
zinc
pi * radius squared
To reduce the pressure from the cylinders to safe and workable pressures
Flooded

21. The specific gravity of a liquid can only be measured using the following instrument...
25' from any worker
pi * radius squared
hydrometer
Too fast of a travel rate

22. What is the welding position 2 - on the electrode mean?
return fitting
Flat and horizontal positions
BCuP - Stands for Brazed Copper Phosphorus
Steam

23. The type of valve permitted downstream of a temperature and pressure relief valve on a water heater is...
1:48 - because 1/4 of an inch is 1/48th of a foot
take-off must be subtracted from the end-to-center measurement.
no valves permitted
blow the valves for a moment

24. What is the expansion and compression of water vapor in a pump?
10 feet
Cavitation
ALWAYS
Vaporization

25. What instrument is best for measuring vacuum?
To reduce the pressure from the cylinders to safe and workable pressures
Up and Down
Manometer
Guide - Anchor - Guide

26. Which is the correct formula for the area of a circle?
Axis of pipe should be on a 45 degree
pi * radius squared
.7854 x D squared
Thermostatic - Thermodynamic and Mechanical

27. A device that mechanically attaches to the side of a flange on a beam is called a...
Mechanical return is used.
Tagged and removed from service.
Beam clamp
Red.. think M&M is RED

28. Which of the following is the decimal equivalent of 5/8'(inch)
.625
Positive
Green
Loosen the far bolts first

29. To sense the temperature remotely from the thermostat location you would use...
The Evaporator
The pump creates a differential in pressure that moves the water.
Green... think KKelly GREEN
Remote bulb

30. What has the largest effect on pump alignment?
Flux
Arrange a wire rope clamp so that the dead end has the U bolts
34 feet
Pipe strain

31. What is typically a final control element?
Valve
Strainer
A pry bar
orthographic

32. Which type of orifice plate is designed to measure flow of liquids containing solids?
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
return fitting
Segmental
Set point

33. Where is a bourdon tube found?
Latent
30 Degrees
In a pressure gauge
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.

34. Which of the following types of clamps are used to dampen a pipe's movement?
return fitting
Expansion loop.
Snubber
Two Hole

35. A neutral reading on the PH scale is...
The science of heat transfer using water.
falls
DWV
7.0

36. What do the first two digits mean in E7018 electrodes?
The tensile strength of the rod in PSI times 1 -000
15 Feet
Groove
Bight - running end and standing part

37. The color code for DWV copper is...
Backflow preventer
sewage
Yellow.. think Dee Double U is yelloWWW
14'(inch)

38. Which of the following is sometimes used as a shielding gas in the GTAW process?
Magnesium
Pipe penetration
Mechanical/Thermostatic
Argon

39. What type of expansion joint utilizes mechanical movement?
200 lbs
Remove the packing
.075lbs
Ball joint - Bellows Joint and Packed Joint

40. Why is it necessary to use roller hangers?
To allow for thermal movement
BCuP - Stands for Brazed Copper Phosphorus
the employer
Green... think KKelly GREEN

41. The combining of more than one metal is...
Alloying
maximum rated capacity
tangent 1/2 angle x radius
Positive

42. The leading cause of on-the-job deaths in the construction industry is _______________.
Before the strainer and fully open.
Guide - Anchor - Guide
falls
14.7psia - always in PSI-A

43. A mixing valve has ___ inlets and ___ outlets.
2 and 1
250 degrees
Down Stream
1

44. What type of Copper tubing is not identified by color on the tubing itself?
Solder joints
the core
soft tempered
Globe valve

45. All of the following are process control elements EXCEPT...
Valve
25' from any worker
piping
The tensile strength of the rod in PSI times 1 -000

46. When ordering ACR copper specify the size by...
Down Stream
OD
62.4
return fitting

47. A vertical line in an isometric drawing represents...
Immersion sensor
The impeller
NEVER!
Up and Down

48. Which of the following is NOT a reason to use stud bolts instead of machine bolts for bolting flanged piping joints?
Flat position only
1728
1
The stud bolt is stronger than a machine bolt of the same size and material.

49. What does a condenser do?
On high side of the system and turns gas to liquid.
Pressuretrol
1.5
the core

50. The change in state from solid to liquid is known as...
Fusion
Hydrostatic
Green... think KKelly GREEN
1