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Plumbing Certification

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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. What effect does the fill pressure (static) have on a closed loop plumbing system?
Thermostatic - Thermodynamic and Mechanical
None
Dog Everything
Latent

2. What does GFCI stand for?
Ground Fault Circuit Interrupter
Valve
Down Stream
Green

3. How do you determine gear ratios?

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4. What is the weakest part of a chain hoist?
lower hook
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.
(Total Height - Elevation) * .433 = psig
BUT

5. Which one of the following measures and takes action?
Controller
5 9/16'(inch)
Pipe penetration
Not to scale - does not show locations of equipment. It shows pipe size and flow.

6. A tag line should be used on a crane lift...
250 degrees
200 lbs
ALWAYS
2.31ft

7. What is the standard pressure range for a pneumatic signal?
3 to 15 psi
The same OD as the branch
Air Bound
piping

8. Why is it necessary to use roller hangers?
Yellow.. think Dee Double U is yelloWWW
To allow for thermal movement
Body belts
Increase the pressure when the temperature increases

9. What is capillary action?
The flow of a liquid into a small space
Blue... think b-LLLLue
Ball joint - Bellows Joint and Packed Joint
1

10. When a cranes signaler's hand is pointed up with his finger moving in a circle it means to...
Raise the load
Equalizing line
Discharge
discharge

11. Which one of the following alloys does not require flux when brazing copper to copper joints?
BCuP - Stands for Brazed Copper Phosphorus
Absolute
Expansion Device
.491lbs

12. Annealing copper...
galvanized
Dry expansion type
Softens it
1 foot

13. Why can flux be omitted in a brazed joint?
231
Never
13/16'(inch)
The flux is in the filler material

14. If the travel of a 45 degree offset is known - what formula can be used to find the advance?
.707 x Travel
Quarter
Protection for loss of water in the boiler.
1 5/16'(inch)

15. One gallon of water weighs?
.01745 - 3.1416 - and .7854
8.33 pounds
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)
near the middle of the jaws

16. The weight of 1 cubic foot of water is...
Condensate pump size
Mechanical/Thermostatic
62.4lbs
1 foot

17. What is the minimum thickness for threading PVC pipe?
Sch 40
Bumping
Divide the diameter by half 4 times - put the 2nd and 4th number together to get the answer. Example - 6'(inch) 45 would be - 6 - 3 - 1 1/2 and 3/4. Answer 3 3/4'(inch)
The stud bolt is stronger than a machine bolt of the same size and material.

18. What causes water to move in a Hydronic system?
The pump creates a differential in pressure that moves the water.
Globe
Mechanical return is used.
Positive

19. What size hole should be cut into a main to saddle ON a smaller pipe?
Steam
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
true isometric
The same ID as the branch

20. An exit from a trench should be no more than...

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21. For an extension ladder to be at the correct angle for safe use on a working surface 20ft high. The ladder must be located how many feet away from the base?
Height * .433 = psig
Increase
4 1/2'(inch)
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.

22. Theoretically - a pump can raise water by suction approximately __________ feet vertically.
.135 cu ft
After cutting
The stud bolt is stronger than a machine bolt of the same size and material.
34 feet

23. All of the following are process control elements EXCEPT...
Magnesium
the employer
piping
Never

24. To properly align a flange you must perform what is commonly called a ______ hole...
tangent 1/2 angle x radius
Two Hole
Coating
Yellow.. think Dee Double U is yelloWWW

25. One gallon of water occupies how many cubic feet?
Notify response team and allow them to rescue.
Bight - running end and standing part
In a pressure gauge
.135 cu ft

26. What causes water hammer?
Dry expansion type
Insufficient condensate drainage
8.33lbs
62.4

27. Calculate head pressure in a section of vertical pipe?
Thermostatic - Thermodynamic and Mechanical
Height * .433 = psig
compression
Flooded

28. One foot of water exerts...
4 to 20 milliamps
Eccentric reducer (flat on top)
.433psi
200 lbs

29. One atmosphere is equal to...
34 feet
14.7psia - always in PSI-A
Allow moisture to escape
Insufficient condensate drainage

30. To assemble a 4 bolt flange...
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
Absolute
Loosen the far bolts first
Pipe strain

31. 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.
Primer
840
Eccentric reducer (flat on top)
falls

32. A rating of 150# refers to a flange's...
Guide - Anchor - Guide
None
Insure progressively tighter fit
Pressure rating

33. What is the purpose of the oxygen and acetylene regulators?
steam and condensate flowing in the same direction
To reduce the pressure from the cylinders to safe and workable pressures
Arrange a wire rope clamp so that the dead end has the U bolts
Flashing

34. What is installed after the isolation valve and before the trap union on a standard trap assembly?
1.5
Eccentric reducer (flat on top)
Strainer
Vaporization

35. When a flux joint is overheated it will not...
Fuse
Insufficient condensate drainage
Increase
Prevailing wind speed and direction - environmental concerns - zoning requirements

36. What type of hanger uses a spring that splits the rod?
Material Safety Data Sheet
Spring hanger
In a pressure gauge
Erratic readings

37. When changing pipe sizes in the horizontal supply or return lines of a two-pipe hot water heating system use...
Choked position
25 feet
Eccentric reducers - flat on top
Vaporization

38. The proper way to extinguish a fire is to...
Fusion
soft tempered
Point at the base and sweep the base with the extinguisher
Discharge

39. The type of drawing that most closely resembles an object as the eye would see it is referred to as a/an __________ drawing.
To protect the threads from rust.
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.
Fusion
true isometric

40. A concentric reducer could be used to connect to a horizontal pump _______________ line.
Discharge
Controller
Hydraulics
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)

41. One pound of water pressure is equal to...
3 to 15 psi
Cavitation
2.31ft
Flashing

42. What is Hydronics?
A pry bar
Down Stream
8 5/8'(inch)
The science of heat transfer using water.

43. Oil is used on a pipe machine to...
cool and lubricate the die
1 foot
set point
dry expansion

44. In a refrigeration system a condensable gas is...
Ammonia
1/2 BTU
maximum rated capacity
Never

45. What is the purpose for a weep hole in a saddle pad?
true isometric
Axis of pipe should be on a 45 degree
Allow moisture to escape
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.

46. .433 psig is equal to how high of a water column?
Level the 90 in horizontal position determine inside arc - backside arc and face to center dimensions for 60 degree elbow - mark and cut
1 foot
250 degrees
Eccentric reducers - flat on top

47. What are the three rope parts used in tying knots and hitches?
Sch 80 Steel pipe
Insert pipe into fitting and turn 1/4 turn and hold
Bight - running end and standing part
34 feet

48. Which of the following is sometimes used as a shielding gas in the GTAW process?
Roller hangers
Argon
2 and 1
Mechanical return is used.

49. When using a cable come-a-long - what safety device will indicate overloading?
sewage
handle will bend
Expansion loop.
Flash Tank

50. A fan coil uses ______ to distribute heating or cooling to the space.
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
4 times
Forced convection - because the FAN forces convection!
7.48

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Plumbing Certification

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