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 changing pipe sizes in the horizontal supply or return lines of a two-pipe hot water heating system use...
840
the core
supporter of combustion
Eccentric reducers - flat on top

2. The density of water is...
no valves permitted
BCuP - Stands for Brazed Copper Phosphorus
62.4
8 5/8'(inch)

3. The amount of heat it takes to raise one pound of water one degree Fahrenheit is known as a...
Ground Fault Circuit Interrupter
Snubber
BUT
Dog Everything

4. What are the three types of steam traps?
Choked position
14'(inch)
Thermostatic - Thermodynamic and Mechanical
pi * radius squared

5. The face to center measurement of any welded angle fitting equals...
Discharge
Raise the load
tangent 1/2 angle x radius
foot valve

6. In a refrigeration system a condensable gas is...
Ammonia
62.4lbs
Absolute
Purge the line when brazing

7. To sense the temperature remotely from the thermostat location you would use...
Air Bound
None
Remote bulb
2 3/8'(inch)

8. The change in state from solid to liquid is known as...
Conduction - convection and radiant.
Fusion
Dog Everything
ALWAYS

9. OD for 6'(inch)

10. In one cubic foot there are _________ cubic inches.
foot valve
Flash Tank
1728
Fuel - Heat - Oxygen

11. The specific weight of air and water is...
All the way to the shoulder
1
Remove the packing
To reduce the pressure from the cylinders to safe and workable pressures

12. In a piping installation allowing for expansion in two directions - how should the anchor(s) and guide(s) be positioned relative to each other?
orthographic
Quarter
1
Guide - Anchor - Guide

13. .433 psig is equal to how high of a water column?
1 foot
Spring hanger
radius squared times PI
steel to copper joints

14. The type of drawing that most closely resembles an object as the eye would see it is referred to as a/an __________ drawing.
Backflow preventer
.707 x Travel
true isometric
Pressure rating

15. What size hole should be cut into a main to saddle IN a smaller pipe?
Body belts
The same OD as the branch
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
Climbing the cross braces.

16. Formula for a cubic foot of an unknown substances weight?
Protection for loss of water in the boiler.
hydrometer
14.7 psia
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

17. To order a reducing tee you should specify the size by...
Its cheaper!
Increase in friction
Large end to smaller end to center(bull)
Protection for loss of water in the boiler.

18. A cooling tower must have a ________ or be open-site.
75 degrees - also 4 to 1
.491lbs
5 9/16'(inch)
Backflow preventer

19. A fan coil uses ______ to distribute heating or cooling to the space.
Forced convection - because the FAN forces convection!
All the way to the shoulder
Prevailing wind speed and direction - environmental concerns - zoning requirements
Eccentric reducer (flat on top)

20. What is the specific gravity of water?
Pipe strain
1
Clove hitch with a half hitch
840

21. A float and thermostatic trap is a...
Eccentric reducer (flat on top)
steel to copper joints
Mechanical/Thermostatic
Remove the packing

22. What is the main reason for the taper on a pipe thread?
Schedule 10
Remove the packing
Axis of pipe should be on a 45 degree
Insure progressively tighter fit

23. One pound of water pressure is equal to...
Waterlogged
Mechanical/Thermostatic
supporter of combustion
2.31ft

24. 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.
840
2 3/8'(inch)
Pipe penetration
discharge

25. The ______ is used to protect the weld puddle from contamination in the SMAW process.
Insufficient condensate drainage
6 5/8'(inch)
Two Hole
Flux

26. Momentarily closing the starting switch to check the rotation of the pump is known as __________ the pump.
1/2 BTU
return fitting
Bumping
the employer

27. What does the crane signal with the index finger pointed forward in a swirling motion signal?
2.31ft
Flux
Raise the load
14'(inch)

28. The color code for type K copper is...
Green... think KKelly GREEN
Spring hanger
Crimson... think aCRimson
radius squared times PI

29. What is the expansion and compression of water vapor in a pump?
Provide oxygen barrier - stabilize and direct the force of the arc and to gather impurities in the form of slag.
8 5/8'(inch)
9
Cavitation

30. A _______________ reamer should NOT be used with power operated pipe threading equipment
NEVER!
Height * .433 = psig
Spiral
The flux burns and the joint becomes ineffective

31. How many 2'(inch) pipes can be supplied from a 6'(inch) header?
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
Arrange a wire rope clamp so that the dead end has the U bolts
9
Prevailing wind speed and direction - environmental concerns - zoning requirements

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

33. Why is it necessary to use roller hangers?
To allow for thermal movement
Mechanical return is used.
Continuously
1.25'(inch)

34. A thermostatic steam trap that fails in the closed position would cause a heating unit to become...
Hydrostatic
Center of the pipe
Waterlogged
Down Stream

35. What is the formula to figure the area of a circle?
Choked position
To protect the threads from rust.
radius squared times PI
Flashing

36. When a pipe size is decreased by half - the carrying capacity of the pipe decreases by...
.625
Crimson... think aCRimson
Quarter
With the weld at a 45 degree angle

37. The sum of atmospheric and gauge pressure is known as __________ pressure.
Absolute
Forced convection - because the FAN forces convection!
To provide movement cause from a change in temperature
Ammonia

38. When loosening the bolts on a flange one should...
7.48
Remove the packing
Loosen the far bolts first
3 to 15 psi

39. How far should a copper tube be inserted into a cup for a brazed joint?
foot valve
The tensile strength of the rod in PSI times 1 -000
All the way to the shoulder
Beam clamp

40. Why is it necessary to use flux on a soldered joint?
Beam clamp
return fitting
When a large volume of condensate is generated
To chemically prepare the pieces for soldering

41. To figure the end-to-end measurement of a piece of pipe when the end-to-end center measurement is known the...
take-off must be subtracted from the end-to-center measurement.
Backflow preventer
Flash Tank
Its cheaper!

42. An abrasive wheel should never run faster than it...
maximum rated capacity
Purge the line when brazing
The impeller
Groove

43. The device that controls the pressure in a low pressure steam boiler is called a...
sewage
foot valve
250 degrees
Pressuretrol

44. The change in state from a liquid to gas is known as...
15 PSI
BCuP - Stands for Brazed Copper Phosphorus
Pipe strain
Vaporization

45. Capillary action is used in...
1.5
Solder joints
Air Bound
15 Feet

46. A sling is weakest in which position?
Red.. think M&M is RED
Choked position
Large end to smaller end to center(bull)
return fitting

47. Guides are used near...
Anchors
.01745 - 3.1416 - and .7854
The flux is in the filler material
Globe valve

48. The best knot to use when lifting pipe vertically is the...
36'(inch)
In the direction of flow
Clove hitch with a half hitch
212 degrees F

49. What causes water hammer?
Vaporization
Insufficient condensate drainage
Primer
.075lbs

50. OD for 8'(inch)