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Plumbing Certification

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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. The density of 1 cubic inch of Mercury is...
1:48 - because 1/4 of an inch is 1/48th of a foot
34 feet
.491lbs
maximum rated capacity

2. The anode rod used in a hot water heater to protect it from corrosion is made of...
BUT
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
Magnesium
take-off must be subtracted from the end-to-center measurement.

3. What has the largest effect on pump alignment?
Pipe strain
The flow of a liquid into a small space
In a pressure gauge
Spiral Wound

4. Use of air as a power source is known as...
Pneumatics
In the direction of flow
Ground Fault Circuit Interrupter
The tensile strength of the rod in PSI times 1 -000

5. The face to center measurement of any welded angle fitting equals...
In a pressure gauge
Prevailing wind speed and direction - environmental concerns - zoning requirements
To protect the threads from rust.
tangent 1/2 angle x radius

6. Why can flux be omitted in a brazed joint?
take-off must be subtracted from the end-to-center measurement.
Height * .433 = psig
The flux is in the filler material
Ammonia

7. The leading cause of on-the-job deaths in the construction industry is _______________.
14.7psia - always in PSI-A
falls
Steam
To reduce the pressure from the cylinders to safe and workable pressures

8. What should be done first when preparing a copper joint?
Controller
near the middle of the jaws
Clean all surfaces
25' from any worker

9. What are the three types of steam traps?
Thermostatic - Thermodynamic and Mechanical
Provide oxygen barrier - stabilize and direct the force of the arc and to gather impurities in the form of slag.
Eccentric reducer (flat on top)
The tensile strength of the rod in PSI times 1 -000

10. How much does 1 cubic foot of air weigh?
.075lbs
13/16'(inch)
Fusion
Crimson... think aCRimson

11. A Hartford loop is used for...
Protection for loss of water in the boiler.
compression
13/16'(inch)
Waterlogged

12. What should be done to prepare a flange for the gasket installation?
Remove any paint or rust.
compression
231
.01745 - 3.1416 - and .7854

13. One gallon of water occupies how many cubic feet?
6 5/8'(inch)
.135 cu ft
Choked position
piping

14. What does a condenser do?
Air
Prevailing wind speed and direction - environmental concerns - zoning requirements
Spiral Wound
On high side of the system and turns gas to liquid.

15. The proper way to extinguish a fire is to...
Primer
The stud bolt is stronger than a machine bolt of the same size and material.
Point at the base and sweep the base with the extinguisher
Arrange a wire rope clamp so that the dead end has the U bolts

16. A tag line should be used on a crane lift...
Positive
ALWAYS
2.31ft
In a pressure gauge

17. The specific weight of mercury is...
Absolute
.0361
The temperature that the joints are made - the flux and temperatures of the system
bowline on a bight

18. What is the maximum pressure for an acetylene hose?
Hydrostatics
4 times
15 PSI
lower hook

19. Which of the following methods of access to a scaffold is prohibited?
Climbing the cross braces.
1.25'(inch)
Up and Down
Coating

20. A direct acting thermostat is used to...
Increase the pressure when the temperature increases
blow the valves for a moment
Climbing the cross braces.
200 lbs

21. Annealing copper...
Dog Everything
Not to scale - does not show locations of equipment. It shows pipe size and flow.
Cavitation
Softens it

22. In a piping installation allowing for expansion in two directions - how should the anchor(s) and guide(s) be positioned relative to each other?
Guide - Anchor - Guide
Green... think KKelly GREEN
the employer
8 5/8'(inch)

23. Which of the following is NOT a reason to use stud bolts instead of machine bolts for bolting flanged piping joints?
Increase
Pneumatics
The flow of a liquid into a small space
The stud bolt is stronger than a machine bolt of the same size and material.

24. The smallest nominal size DWV copper tube is...

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25. The color code for type M copper is...
Dry expansion type
Forced convection - because the FAN forces convection!
Red.. think M&M is RED
protect worker safety and health

26. The density of water is...
In the hot water heating pumps discharge piping.
4 to 20 milliamps
The flow of a liquid into a small space
62.4

27. When should a person designated as an attendant attempt to rescue a worker that is trapped?
Erratic readings
Never
25' from any worker
BCuP - Stands for Brazed Copper Phosphorus

28. How do you determine gear ratios?

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29. What causes water to move in a Hydronic system?
Absolute
Purge the line when brazing
The pump creates a differential in pressure that moves the water.
Flat and horizontal positions

30. Condensate lines should be pitched...
Pressure rating
In the direction of flow
Its cheaper!
The flux burns and the joint becomes ineffective

31. To determine the travel for a 45 degree rolling offset you would...
3 1/2'(inch)
Basket
Multiply the length of the hypotenuse of the roll and the set by 1.414
2.31ft

32. A device that mechanically attaches to the side of a flange on a beam is called a...
foot valve
Beam clamp
Eccentric reducers - flat on top
Point at the base and sweep the base with the extinguisher

33. You should never blow your clothes off with oxygen because oxygen is a/an
Never
Pipe strain
supporter of combustion
14.7psia - always in PSI-A

34. A concentric reducer could be used to connect to a horizontal pump _______________ line.
Spiral Wound
Primer
Protection for loss of water in the boiler.
discharge

35. What is on the low side of the vapor compression cycle?
Provide oxygen barrier - stabilize and direct the force of the arc and to gather impurities in the form of slag.
The Evaporator
2nd gear divided by primary gear. Example: A machine has a primary pulley of 6'(inch) and a secondary pulley of 24'(inch). Formula is 24/6=4 - so the ratio is 4 to 1
Eccentric reducer (flat on top)

36. Why is it necessary to use flux on a soldered joint?
Pressure Rating
To chemically prepare the pieces for soldering
Clean all surfaces
Cavitation

37. Which is the correct formula for the area of a circle?
Discharge
take-off must be subtracted from the end-to-center measurement.
.7854 x D squared
The pump creates a differential in pressure that moves the water.

38. Where should the high pressure condensate be piped to before entering the receiver?
Flash Tank
Increase the pressure when the temperature increases
Material Safety Data Sheet
The same OD as the branch

39. Which way should the bevel face on an orifice plate?
Down Stream
To reduce the pressure from the cylinders to safe and workable pressures
Primer
The flow of a liquid into a small space

40. A concentric reducer could be used to connect to a horizontal pump _______________ line.
Solder joints
Discharge
1/2 BTU
Softens it

41. 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?
galvanized
The flux is in the filler material
9
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.

42. The pipe that connects the steam header to the boiler return connection is the...
steel to copper joints
Fuel - Heat - Oxygen
Equalizing line
Valve

43. The amount of heat it takes to raise one pound of water one degree Fahrenheit is known as a...
Choked position
compression
BUT
Ball joint - Bellows Joint and Packed Joint

44. One atmosphere is equal to...
Bight - running end and standing part
Steam
Remote bulb
14.7psia - always in PSI-A

45. What is the formula to calculate thermal expansion?

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46. When a liquid changes immediately to a vapor it is called...
Flashing
.135 cu ft
Pressure Rating
15 Feet

47. To order a reducing tee you should specify the size by...
1 foot
The same ID as the branch
Purge the line when brazing
Large end to smaller end to center(bull)

48. The best knot to use when lifting pipe vertically is the...
Pressure rating
The temperature that the joints are made - the flux and temperatures of the system
Clove hitch with a half hitch
Bight - running end and standing part

49. What is the expansion and compression of water vapor in a pump?
Coating
Cavitation
Insure progressively tighter fit
Strainer

50. When is it safe to remove the old packing from a valve that is under pressure?
.7854 x D squared
180
Fuel - Heat - Oxygen
NEVER!

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Plumbing Certification

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