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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. One cubic foot of water weighs?
62.4 pounds
.707
Discharge
Capillary action

2. What is the standard for an electronic signal?
the employer
Hydraulics
Pipe strain
4 to 20 milliamps

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

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4. What type of flame should be used to cut carbon steel?
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
Increase the pressure when the temperature increases
Neutral
Expansion loop.

5. When is it safe to remove the old packing from a valve that is under pressure?
true isometric
NEVER!
Groove
near the middle of the jaws

6. A _______________ reamer should NOT be used with power operated pipe threading equipment
1/2 BTU
A pry bar
180
Spiral

7. To determine the set on a 45 degree offset you would multiply the travel by...
Bight - running end and standing part
14'(inch)
.707
Pipe penetration

8. The amount of heat necessary bring about a change of state from solid to liquid or liquid to gas is known as _______________ heat.
1728
Never
Latent
Notify response team and allow them to rescue.

9. The specific weight of air and water is...
1
14.7psia - always in PSI-A
Expansion Device
4 times

10. The last two digits on an E-6010 electrode specify...
the type of coating and current
lower hook
36'(inch)
30 Degrees

11. An increase in pressure will cause the boiling point of water to ________...
Basket
Increase
1728
To reduce the pressure from the cylinders to safe and workable pressures

12. 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.
dry expansion
Saturated
supporter of combustion
lower hook

13. What is the purpose of the expansion joint in a steam system?
Eccentric reducers - flat on top
DWV
To provide movement cause from a change in temperature
Solder joints

14. Which of the following is an essential element necessary to produce an ordinary fire?
After cutting
Fuel - Heat - Oxygen
Backflow preventer
Cavitation

15. The change in state from solid to liquid is known as...
Pipe strain
foot valve
Its cheaper!
Fusion

16. What does the evaporator do?
.433psi
On low side of the system and expands liquid to low pressure gas.
soft tempered
Remote bulb

17. The pipe that connects the steam header to the boiler return connection is the...
Globe
true isometric
Equalizing line
Above the main

18. The amount of heat it takes to raise one pound of water one degree Fahrenheit is known as a...
Eccentric reducers - flat on top
.707 x Travel
Insert pipe into fitting and turn 1/4 turn and hold
BUT

19. What is typically a final control element?
Valve
Insure progressively tighter fit
bowline on a bight
the type of coating and current

20. When should a person designated as an attendant attempt to rescue a worker that is trapped?
Ammonia
Insure progressively tighter fit
Never
Pipe penetration

21. A mixing valve has ___ inlets and ___ outlets.
ALWAYS
Remote bulb
bowline on a bight
2 and 1

22. The weight of 1 cubic foot of water is...
Erratic readings
Expansion loop.
62.4lbs
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.

23. What is not a requirement to size the steam trap on a heating unit?
Condensate pump size
Argon
The flux is in the filler material
Its cheaper!

24. Steam supply using parallel flow is...
steam and condensate flowing in the same direction
tangent 1/2 angle x radius
1.5
Loosen the far bolts first

25. The color code for type L copper is...
200 lbs
maximum rated capacity
Blue... think b-LLLLue
zinc

26. What is the main reason for the taper on a pipe thread?
Conduction - convection and radiant.
Insure progressively tighter fit
Type K
Sensor

27. When a pipe size is decreased by half - the carrying capacity of the pipe decreases by...
Quarter
handle will bend
Ball joint - Bellows Joint and Packed Joint
Pipe strain

28. Steam in contact with the water it has been generated from is known as ________________ steam.
25 feet
Saturated
Point thumb up
The science of heat transfer using water.

29. Calculate head pressure of a vertical pipe at specific elevations.
.01745 - 3.1416 - and .7854
4 to 20 milliamps
(Total Height - Elevation) * .433 = psig
Condensate pump size

30. What are the three rope parts used in tying knots and hitches?
Bight - running end and standing part
7.0
blow the valves for a moment
180

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.
The flux burns and the joint becomes ineffective
In the direction of flow
Point thumb up
840

32. Which of the following constants are used when working with circles and areas?
.01745 - 3.1416 - and .7854
Flat and horizontal positions
All the way to the shoulder
To chemically prepare the pieces for soldering

33. Soldered joints should never be used on systems above...
15 Feet
250 degrees
200 lbs
Forced convection - because the FAN forces convection!

34. In one cubic foot there are _________ cubic inches.
1728
bowline on a bight
Loosen the far bolts first
Tagged and removed from service.

35. Capillary action is used in...
Choked position
Solder joints
Discharge
100% of the rated capacity

36. What causes pressure drop?
Blue... think b-LLLLue
take-off must be subtracted from the end-to-center measurement.
Spiral
Increase in friction

37. With a high pressure valve you should never _____ under pressure.
Snubber
Bumping
Remove the packing
take-off must be subtracted from the end-to-center measurement.

38. When a soldered joint is overheated...
4 times
The flux burns and the joint becomes ineffective
1:48 - because 1/4 of an inch is 1/48th of a foot
2.31ft

39. What type of hanger uses a spring that splits the rod?
The tubing has been cleaned for oxygen service
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)
180
Spring hanger

40. When leaning a ladder against an object - the ladder should be at an approximate angle of __________ degrees.
Point thumb up
Quarter
75 degrees - also 4 to 1
Bumping

41. How much does 1 cubic foot of air weigh?
62.4lbs
.075lbs
Pneumatics
1.5

42. Which component in a closed control loop is the primary element?
Sensor
Cavitation
the core
The pump creates a differential in pressure that moves the water.

43. The 6G welding position is...
sewage
In a pressure gauge
cool and lubricate the die
With the weld at a 45 degree angle

44. Why is it necessary to use flux on a soldered joint?
8.33lbs
.433psi
Sensor
To chemically prepare the pieces for soldering

45. To fabricate a 60 degree elbow from a 90 you would...
36'(inch)
5 9/16'(inch)
Level the 90 in horizontal position determine inside arc - backside arc and face to center dimensions for 60 degree elbow - mark and cut
Neutral

46. A fan coil uses ______ to distribute heating or cooling to the space.
840
Flooded
Forced convection - because the FAN forces convection!
galvanized

47. Which rigging configuration has the greatest sling strength?
Softener
The flux burns and the joint becomes ineffective
The temperature that the joints are made - the flux and temperatures of the system
Basket

48. Which of the following has the largest inside diameter?
Schedule 10
Hydraulics
Hazard prevention and control.
Condensate pump size

49. The color code for type K copper is...
Green... think KKelly GREEN
Not to scale - does not show locations of equipment. It shows pipe size and flow.
62.4lbs
4 times

50. One atmosphere is equal to...
Never
3 to 15 psi
14.7psia - always in PSI-A
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.

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Plumbing Certification

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