Test your basic knowledge |

Plumbing Certification

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
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. To figure the end-to-end measurement of a piece of pipe when the end-to-end center measurement is known the...
.075lbs
take-off must be subtracted from the end-to-center measurement.
.0361
Primer

2. What is the best valve for throttling?
Globe
Absolute
Pipe strain
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.

3. OD for 4'(inch)

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4. A sling is weakest in which position?
Equalizing line
Globe valve
Choked position
Ammonia

5. When a pipe size is decreased by half - the carrying capacity of the pipe decreases by...
Quarter
Spiral
The system temperature - thermal and dynamic movement of the pipe and vibration.
Ball joint - Bellows Joint and Packed Joint

6. What is typically a final control element?
OD
Valve
36'(inch)
1

7. One pound of water pressure is equal to...
Green... think KKelly GREEN
2.31ft
Water
Two Hole

8. What is not a requirement to size the steam trap on a heating unit?
36'(inch)
Body belts
Condensate pump size
All the way to the shoulder

9. When a soldered joint is overheated...
Before the strainer and fully open.
Allow moisture to escape
Never
The flux burns and the joint becomes ineffective

10. Which of the following is sometimes used as a shielding gas in the GTAW process?
Discharge
Argon
On high side of the system and turns gas to liquid.
the employer

11. One gallon of water weighs?
Pressure rating
8.33 pounds
near the middle of the jaws
250 degrees

12. When a cranes signaler's hand is pointed up with his finger moving in a circle it means to...
Raise the load
To allow for thermal movement
Large volumes of condensate flash back to liquid in the tank so it removes trapped steam from the condensate.
Notify response team and allow them to rescue.

13. OD for 6'(inch)

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14. The best method to ensure that a plastic joint is made properly - you should...
.7854 x D squared
Fusion
Insert pipe into fitting and turn 1/4 turn and hold
Flux

15. The color code for type L copper is...
Blue... think b-LLLLue
Bight - running end and standing part
Ammonia
Crimson... think aCRimson

16. What type of expansion joint utilizes mechanical movement?
Neutral
Ball joint - Bellows Joint and Packed Joint
true isometric
hydrometer

17. To determine the face to center measurement of a long radius 90 degree elbow - multiply the pipe size by...
1.5
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.
Large volumes of condensate flash back to liquid in the tank so it removes trapped steam from the condensate.
Erratic readings

18. A Hartford loop is used for...
ALWAYS
Groove
7.48
Protection for loss of water in the boiler.

19. Which rigging configuration has the greatest sling strength?
Snubber
Above the main
25 feet
Basket

20. What is the purpose of the oxygen and acetylene regulators?
14.7psia - always in PSI-A
To reduce the pressure from the cylinders to safe and workable pressures
The pump creates a differential in pressure that moves the water.
Alloying

21. What is the maximum pressure for an acetylene hose?
All the way to the shoulder
The flux burns and the joint becomes ineffective
15 PSI
Solder joints

22. A system which the refrigerant is in the shell and cools the fluid in the tubes is...
Set point
Large volumes of condensate flash back to liquid in the tank so it removes trapped steam from the condensate.
Flooded
Ball joint - Bellows Joint and Packed Joint

23. The density of 1 cubic inch of Mercury is...
The type of coating and current
.491lbs
14.7 psia
On low side of the system and expands liquid to low pressure gas.

24. A guard rail system must withstand a minimum force of __________ pounds.
Positive
Flat and horizontal positions
Latent
200 lbs

25. Standard atmospheric pressure at sea level is _____...
14.7 psia
Increase the pressure when the temperature increases
15 PSI
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.

26. A concentric reducer could be used to connect to a horizontal pump _______________ line.
Erratic readings
discharge
Remote bulb
1.25'(inch)

27. To determine the set on a 45 degree offset you would multiply the travel by...
231
Climbing the cross braces.
Steam
.707

28. There are __________ gallons in a cubic foot.
7.48
7.0
2 3/8'(inch)
Conduction - convection and radiant.

29. What does the stamp Oxy-Med stand for on copper tubing?
piping
The tubing has been cleaned for oxygen service
BUT
3 1/2'(inch)

30. What causes pressure drop?
8.33lbs
Increase in friction
Beam clamp
1728

31. What type of Copper tubing is not identified by color on the tubing itself?
The same OD as the branch
The temperature that the joints are made - the flux and temperatures of the system
Bight - running end and standing part
soft tempered

32. Where should the pressure enter a globe valve?
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)
supporter of combustion
Yellow.. think Dee Double U is yelloWWW
near the middle of the jaws

33. A simple example of a lever is...
Green
A pry bar
Air
dry expansion

34. A mixing valve has ___ inlets and ___ outlets.
Cavitation
The same ID as the branch
West of the building
2 and 1

35. What temperature does water boil at sea level?
212 degrees F
Sensor
galvanized
Pressure rating

36. Which one of the following measures and takes action?
Beam clamp
25' from any worker
Controller
piping

37. The density of water is...
62.4
To chemically prepare the pieces for soldering
100% of the rated capacity
Remote bulb

38. The change in state from a liquid to gas is known as...
Vaporization
1
Point at the base and sweep the base with the extinguisher
Pressuretrol

39. When changing pipe sizes in the horizontal supply or return lines of a two-pipe hot water heating system use...
Fuel - Heat - Oxygen
Eccentric reducers - flat on top
The system temperature - thermal and dynamic movement of the pipe and vibration.
Allow moisture to escape

40. One cubic foot of water weighs?
62.4 pounds
Raise the load
8 5/8'(inch)
.707

41. 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...
.135 cu ft
Capillary action
supporter of combustion
Prevailing wind speed and direction - environmental concerns - zoning requirements

42. The specific weight of air and water is...
1
Saturated
Yellow.. think Dee Double U is yelloWWW
zinc

43. Which of the following types of copper tube has the smallest wall thickness?
To reduce the pressure from the cylinders to safe and workable pressures
All the way to the shoulder
Clean all surfaces
DWV

44. A dielectric fitting should be used on...
In a pressure gauge
8.33lbs
Hydraulics
steel to copper joints

45. What occurs in a flash tank?
Large volumes of condensate flash back to liquid in the tank so it removes trapped steam from the condensate.
2 and 1
Bight - running end and standing part
On high side of the system and turns gas to liquid.

46. What should be done first when preparing a copper joint?
Clean all surfaces
Pressuretrol
2 3/8'(inch)
Increase the pressure when the temperature increases

47. Which of the following is the decimal equivalent of 5/8'(inch)
In the direction of flow
.625
2 and 1
Air Bound

48. How much heat is required to raise 1/2 pound of water 1 degree F?
With the weld at a 45 degree angle
Body belts
The same OD as the branch
1/2 BTU

49. Before attaching regulators to an oxygen cylinder...
231
Latent
Eccentric reducers - flat on top
blow the valves for a moment

50. The type of drawing that views a building by looking directly at the front - top and side is referred to as a/an ___________ drawing.
orthographic
To reduce the pressure from the cylinders to safe and workable pressures
3.1416
soft tempered