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Plumbing Certification

Instructions:

Answer 50 questions in 15 minutes.
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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. Where should the pressure enter a globe valve?
Magnesium
2.31ft
62.4
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)

2. What does GFCI stand for?
Ground Fault Circuit Interrupter
Body belts
Eccentric reducers - flat on top
Mechanical return is used.

3. What is the main reason for the taper on a pipe thread?
Set point
Insure progressively tighter fit
7.48
.433psi

4. With a high pressure valve you should never _____ under pressure.
Remove the packing
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
Softens it
7.48

5. The specific weight of air and water is...
The tubing has been cleaned for oxygen service
1
.707 x Travel
Increase in friction

6. The symbol for pi is equivalent to...
.075lbs
Primer
3.1416
14'(inch)

7. What size hole should be cut into a main to saddle ON a smaller pipe?
The same ID as the branch
Conduction - convection and radiant.
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
.7854 x D squared

8. The letters MSDS stand for...
Yellow.. think Dee Double U is yelloWWW
Climbing the cross braces.
Material Safety Data Sheet
Eccentric reducer (flat on top)

9. Why is it necessary to use roller hangers?
Manometer
Absolute
Expansion loop.
To allow for thermal movement

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

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11. What effect does the fill pressure (static) have on a closed loop plumbing system?
None
Center of the pipe
Pressure rating
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.

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?
MAPP - acetylene - and propane
Forced convection - because the FAN forces convection!
Spiral Wound
Guide - Anchor - Guide

13. When arranging weld coupons for testing position 6G...
Magnesium
To chemically prepare the pieces for soldering
.491lbs
Axis of pipe should be on a 45 degree

14. One gallon of water occupies how many cubic feet?
ALWAYS
.135 cu ft
The science of heat transfer using water.
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

15. When a loop is needed at any point between ends of a rope - the proper knot to tie is the...
Increase in friction
bowline on a bight
Latent
compression

16. What is the sum of all angles in a triangle?
180
Clove hitch with a half hitch
.707 x Travel
Green

17. The density of 1 cubic inch of Mercury is...
Hydraulics
Absolute
.707
.491lbs

18. The most that a crane should be loaded is...
Continuously
Increase
100% of the rated capacity
Tagged and removed from service.

19. The type of drawing that most closely resembles an object as the eye would see it is referred to as a/an __________ drawing.
Multiply the length of the hypotenuse of the roll and the set by 1.414
None
the employer
true isometric

20. Which of the following types of copper tube has the smallest wall thickness?
DWV
set point
West of the building
Ammonia

21. To assemble a 4 bolt flange...
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
13/16'(inch)
8.33 pounds
the core

22. What causes water hammer?
200 lbs
lower hook
250 degrees
Insufficient condensate drainage

23. The best method to ensure that a plastic joint is made properly - you should...
Insert pipe into fitting and turn 1/4 turn and hold
Latent
1
maximum rated capacity

24. What would be the result of an incorrectly installed orifice plate?
Erratic readings
sewage
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
Body belts

25. Condensate lines should be pitched...
In the direction of flow
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)
On high side of the system and turns gas to liquid.
62.4lbs

26. A float and thermostatic trap is a...
34 feet
15 Feet
Mechanical/Thermostatic
The system temperature - thermal and dynamic movement of the pipe and vibration.

27. How much does 1 cubic foot of air weigh?
30 Degrees
.075lbs
1728
Sensor

28. What is not a requirement to size the steam trap on a heating unit?
25' from any worker
Condensate pump size
OD
Remove any paint or rust.

29. What is Hydronics?
The science of heat transfer using water.
Material Safety Data Sheet
tangent 1/2 angle x radius
Pipe strain

30. The final step in the galvanizing of pipe is to dip the pipe into a bath of molten _________?
14'(inch)
Increase in friction
Up and Down
zinc

31. A bushing is NOT a good replacement for a reducer because...
Positive
.7854 x D squared
Its cheaper!
Insufficient condensate drainage

32. Use of air as a power source is known as...
Pneumatics
.707 x Travel
(Total Height - Elevation) * .433 = psig
Sch 40

33. 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
soft tempered
The same OD as the branch
orthographic

34. What size hole should be cut into a main to saddle IN a smaller pipe?
2 3/8'(inch)
The same OD as the branch
Schedule 10
4 times

35. How much heat is required to raise 1/2 pound of water 1 degree F?
1/2 BTU
1 foot
blow the valves for a moment
Continuously

36. There are __________ cubic inches in a gallon.
The Evaporator
Thermostatic - Thermodynamic and Mechanical
231
cool and lubricate the die

37. OD for 8'(inch)

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38. What is the standard for an electronic signal?
4 times
62.4lbs
To reduce the pressure from the cylinders to safe and workable pressures
4 to 20 milliamps

39. A concentric reducer could be used to connect to a horizontal pump _______________ line.
Above the main
Discharge
hydrometer
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.

40. In the cooling cycle - which component throttles the flow of refrigerant?
zinc
.625
Softens it
Expansion Device

41. An oil separator is required on systems using...
Material Safety Data Sheet
Purge the line when brazing
Ammonia
Remote bulb

42. What is the purpose for a weep hole in a saddle pad?
Allow moisture to escape
The Evaporator
1/2 BTU
Sch 40

43. Which component in a closed control loop is the primary element?
Two Hole
blow the valves for a moment
Sensor
Segmental

44. A neutral reading on the PH scale is...
Capillary action
BUT
Ball joint - Bellows Joint and Packed Joint
7.0

45. Which one of the following alloys does not require flux when brazing copper to copper joints?
Bight - running end and standing part
BCuP - Stands for Brazed Copper Phosphorus
The same ID as the branch
compression

46. There are __________ gallons in a cubic foot.
7.48
To allow for thermal movement
The tubing has been cleaned for oxygen service
A pry bar

47. Standard atmospheric pressure at sea level is _____...
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
Softens it
falls
14.7 psia

48. An up-feed steam heating system has the heating units...
62.4 pounds
Ammonia
Above the main
piping

49. Calculate head pressure of a vertical pipe at specific elevations.
Manometer
(Total Height - Elevation) * .433 = psig
The stud bolt is stronger than a machine bolt of the same size and material.
The same OD as the branch

50. A Hartford loop is used for...
The same OD as the branch
Protection for loss of water in the boiler.
Fuse
Large volumes of condensate flash back to liquid in the tank so it removes trapped steam from the condensate.

Can you answer 50 questions in 15 minutes?

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Plumbing Certification

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