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

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2. What should be done to prepare a flange for the gasket installation?
Remove any paint or rust.
Crimson... think aCRimson
Eccentric reducers - flat on top
Absolute

3. The change in state from a liquid to gas is known as...
hydrometer
Vaporization
dry expansion
discharge

4. The combining of more than one metal is...
The science of heat transfer using water.
no valves permitted
62.4 pounds
Alloying

5. When is it safe to remove the old packing from a valve that is under pressure?
Steam
1/2 BTU
Latent
NEVER!

6. The leading cause of on-the-job deaths in the construction industry is _______________.
4 1/2'(inch)
Capillary action
falls
Flat position only

7. Why is it necessary to use flux on a soldered joint?
Ball joint - Bellows Joint and Packed Joint
Waterlogged
To chemically prepare the pieces for soldering
Purge the line when brazing

8. 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.
7.0
Spiral Wound
Choked position
Dry expansion type

9. What type of copper tubing joint requires use of a ferrule?
compression
.707
Hazard prevention and control.
Axis of pipe should be on a 45 degree

10. What is the best valve for throttling?
maximum rated capacity
sewage
Globe
radius squared times PI

11. Where is a bourdon tube found?
Its cheaper!
Globe valve
Multiply the length of the hypotenuse of the roll and the set by 1.414
In a pressure gauge

12. What is the purpose of the expansion joint in a steam system?
Too fast of a travel rate
To provide movement cause from a change in temperature
In a pressure gauge
Manometer

13. With a high pressure valve you should never _____ under pressure.
Controller
Valve
Remove any paint or rust.
Remove the packing

14. What type of valve should be used to bypass a control valve?
Pneumatics
Valve
Globe valve
1

15. The best knot to use when lifting pipe vertically is the...
Before the strainer and fully open.
1:48 - because 1/4 of an inch is 1/48th of a foot
The impeller
Clove hitch with a half hitch

16. What is the weakest part of a chain hoist?
Increase in friction
The stud bolt is stronger than a machine bolt of the same size and material.
1728
lower hook

17. When changing pipe sizes in the horizontal supply or return lines of a two-pipe hot water heating system use...
Thermostatic - Thermodynamic and Mechanical
Eccentric reducers - flat on top
piping
Spiral Wound

18. Soldered joints should never be used on systems above...
lower hook
250 degrees
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)
steam and condensate flowing in the same direction

19. In a typical residential air condittioning system - the evaporator is of the _______________ type - where the liquid refrigerant should be totally vaporized before it reaches the outlet of the evaporator.
The same ID as the branch
.075lbs
In the direction of flow
dry expansion

20. A vent is not needed on a condensate receiver when...
Mechanical return is used.
Alloying
34 feet
the core

21. A condensate receiver is used when...
When a large volume of condensate is generated
Saturated
protect worker safety and health
Ammonia

22. The last two digits on an E-6010 electrode specify
Remove the packing
The type of coating and current
steam and condensate flowing in the same direction
7.48

23. The pipe fitting that makes a 180 degree turn is called a/an?
return fitting
blow the valves for a moment
The science of heat transfer using water.
MAPP - acetylene - and propane

24. An abrasive wheel should never run faster than it...
Allow moisture to escape
Bumping
Raise the load
maximum rated capacity

25. Which of the following constants are used when working with circles and areas?
Purge the line when brazing
Yellow.. think Dee Double U is yelloWWW
.01745 - 3.1416 - and .7854
Fuse

26. The pressure exerted by a liquid at rest is...
Hydrostatic
an eccentric reducer flat on top
.433psi
set point

27. The density of 1 cubic inch of Mercury is...
1728
.491lbs
62.4lbs
Increase in friction

28. What causes water hammer?
Hydrostatic
Body belts
1.25'(inch)
Insufficient condensate drainage

29. What temperature does water boil at sea level?
steel to copper joints
Remove the packing
212 degrees F
Notify response team and allow them to rescue.

30. The most that a crane should be loaded is...
5 9/16'(inch)
The system temperature - thermal and dynamic movement of the pipe and vibration.
Above the main
100% of the rated capacity

31. Steam condensate lines should be installed on...
The Evaporator
Globe valve
Roller hangers
To provide movement cause from a change in temperature

32. Which is the correct formula for the area of a circle?
Controller
.7854 x D squared
Point at the base and sweep the base with the extinguisher
8.33 pounds

33. What causes water to move in a Hydronic system?
Magnesium
The pump creates a differential in pressure that moves the water.
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
Anchors

34. What causes pressure drop?
West of the building
Increase in friction
Fusion
Forced convection - because the FAN forces convection!

35. To figure the end-to-end measurement of a piece of pipe when the end-to-end center measurement is known the...
Remove any paint or rust.
take-off must be subtracted from the end-to-center measurement.
radius squared times PI
Point at the base and sweep the base with the extinguisher

36. How do you determine gear ratios?

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37. An ejector pump is typically used to pump __________.
falls
sewage
Remove the packing
Increase in friction

38. To view the west elevation the viewer's perspective is from the...
Quarter
25 feet
Flashing
West of the building

39. One atmosphere is equal to...
14.7 psia
.075lbs
Water
14.7psia - always in PSI-A

40. To raise the boom of a crane you would...
To protect the threads from rust.
Ammonia
Point thumb up
Waterlogged

41. Where should the high pressure condensate be piped to before entering the receiver?
Flash Tank
The pump creates a differential in pressure that moves the water.
4 times
steel to copper joints

42. What do the first two digits mean in E7018 electrodes?
8.33lbs
Alloying
The tensile strength of the rod in PSI times 1 -000
Roller hangers

43. A mixing valve has ___ inlets and ___ outlets.
Guide - Anchor - Guide
2 and 1
Erratic readings
25 feet

44. What is the formula to calculate thermal expansion?

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45. 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...
.625
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
The same ID as the branch
Capillary action

46. The device that controls the pressure in a low pressure steam boiler is called a...
Pipe strain
Pressuretrol
Raise the load
Eccentric reducers - flat on top

47. The specific weight of mercury is...
compression
Large end to smaller end to center(bull)
The same OD as the branch
.0361

48. The pipe size of a pipe changes from the ID to the OD on what pipe size?

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49. What is not a requirement to size the steam trap on a heating unit?
Hydrostatic
Condensate pump size
3 to 15 psi
Yellow.. think Dee Double U is yelloWWW

50. The specific gravity of a liquid can only be measured using the following instrument...
pi * radius squared
Loosen the far bolts first
Waterlogged
hydrometer

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Plumbing Certification

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