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. OD for 6'(inch)

2. What should be done to prepare a flange for the gasket installation?
ALWAYS
.7854 x D squared
Remove any paint or rust.
4 times

3. What is the weakest part of a chain hoist?
Crimson... think aCRimson
Pipe penetration
Thermostatic - Thermodynamic and Mechanical
lower hook

4. A fan coil uses ______ to distribute heating or cooling to the space.
The type of coating and current
Absolute
Pressure Rating
Forced convection - because the FAN forces convection!

5. If a pump is operating under static suction lift conditions - a __________ may be installed in the suction line to avoid losing the pump's prime each time the pump shuts off.
foot valve
the core
Prevailing wind speed and direction - environmental concerns - zoning requirements
Increase in friction

6. The pressure exerted by a liquid at rest is...
13/16'(inch)
cool and lubricate the die
Hydrostatic
no valves permitted

7. What is installed after the isolation valve and before the trap union on a standard trap assembly?
the employer
Above the main
Strainer
Flat position only

8. What is the sum of all angles in a triangle?
180
Snubber
On high side of the system and turns gas to liquid.
Vaporization

9. What type of expansion joint utilizes mechanical movement?
1:48 - because 1/4 of an inch is 1/48th of a foot
Ball joint - Bellows Joint and Packed Joint
Bight - running end and standing part
falls

10. Name the three methods of transferring heat.
BUT
Loosen the far bolts first
Conduction - convection and radiant.
Center of the pipe

11. When selecting a hanger for a piping system you should consider...
Pressuretrol
Erratic readings
The system temperature - thermal and dynamic movement of the pipe and vibration.
15 Feet

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

13. What type of copper is recommended for refrigeration?
.135 cu ft
.01745 - 3.1416 - and .7854
Type K
The impeller

14. OD for 1'(inch)

15. Since _______________ is virtually incompressible - pressure has little effect on its volume.
8 5/8'(inch)
Coating
Prevailing wind speed and direction - environmental concerns - zoning requirements
Water

16. A triple-duty valve is installed...
Tagged and removed from service.
In the hot water heating pumps discharge piping.
NEVER!
The stud bolt is stronger than a machine bolt of the same size and material.

17. When loosening the bolts on a flange one should...
NEVER!
Sch 80 Steel pipe
Loosen the far bolts first
Positive

18. The control point adjustment on a receiver is used to change the _______________.
set point
Allow moisture to escape
Immersion sensor
hydrometer

19. What is the main reason for the taper on a pipe thread?
Insure progressively tighter fit
falls
Remove any paint or rust.
34 feet

20. The amount of heat necessary bring about a change of state from solid to liquid or liquid to gas is known as _______________ heat.
DWV
Latent
13/16'(inch)
The type of coating and current

21. In one cubic foot there are _________ cubic inches.
The stud bolt is stronger than a machine bolt of the same size and material.
Strainer
1728
Pneumatics

22. Which component in a closed control loop is the primary element?
Sensor
62.4 pounds
Never
Manometer

23. OD for 5'(inch)

24. Which of the following has the largest inside diameter?
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
75 degrees - also 4 to 1
Flat position only
Schedule 10

25. What size hole should be cut into a main to saddle IN a smaller pipe?
Expansion loop.
Flat and horizontal positions
62.4
The same OD as the branch

26. A schematic drawing is...
Not to scale - does not show locations of equipment. It shows pipe size and flow.
Conduction - convection and radiant.
Level the 90 in horizontal position determine inside arc - backside arc and face to center dimensions for 60 degree elbow - mark and cut
hydrometer

27. Which rigging configuration has the greatest sling strength?
Basket
15 PSI
Point at the base and sweep the base with the extinguisher
4 1/2'(inch)

28. What is the formula to calculate thermal expansion?

29. What type of hanger uses a spring that splits the rod?
Spring hanger
no valves permitted
The tensile strength of the rod in PSI times 1 -000
Water

30. What is the purpose of the expansion joint in a steam system?
To provide movement cause from a change in temperature
MAPP - acetylene - and propane
Hydraulics
Expansion loop.

31. Theoretically - a pump can raise water by suction approximately __________ feet vertically.
34 feet
Softener
The type of coating and current
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.

32. The specific weight of air and water is...
1
Erratic readings
Forced convection - because the FAN forces convection!
Schedule 10

33. When gripping a pipe with a pipe wrench - the wrench should be adjusted so the pipe is...
near the middle of the jaws
Blue... think b-LLLLue
MAPP - acetylene - and propane
.135 cu ft

34. The combining of more than one metal is...
Alloying
Spiral Wound
Flat position only
Pipe penetration

35. Which of the following is NOT acceptable as part of a personal fall arrest system?
Backflow preventer
8.33lbs
Body belts
Mechanical return is used.

36. A single line drawing of a piping system represents the...
Center of the pipe
Remove any paint or rust.
2 3/8'(inch)
Point thumb up

37. One gallon of water weighs?
To protect the threads from rust.
Remote bulb
Climbing the cross braces.
8.33 pounds

38. An up-feed steam heating system has the heating units...
Above the main
In the direction of flow
The flux is in the filler material
Alloying

39. OD for 4'(inch)

40. When a flux joint is overheated it will not...
hydrometer
Fuse
In the hot water heating pumps discharge piping.
4 times

41. What type of valve should be used to bypass a control valve?
hydrometer
To allow for thermal movement
Globe valve
When a large volume of condensate is generated

42. Why can flux be omitted in a brazed joint?
Valve
cool and lubricate the die
The flux is in the filler material
Crimson... think aCRimson

43. What type of Copper tubing is not identified by color on the tubing itself?
On low side of the system and expands liquid to low pressure gas.
soft tempered
foot valve
The system temperature - thermal and dynamic movement of the pipe and vibration.

44. In the cooling cycle - which component throttles the flow of refrigerant?
4 times
.7854 x D squared
lower hook
Expansion Device

45. The main cause of undercutting is...
Too fast of a travel rate
In the hot water heating pumps discharge piping.
Segmental
return fitting

46. Steam in contact with the water it has been generated from is known as ________________ steam.
Mechanical return is used.
4 times
handle will bend
Saturated

47. What is the minimum safe clearance between cranes and energized power lines operating at 50kV or below?
Choked position
falls
10 feet
Waterlogged

48. One pound of water pressure is equal to...
bowline on a bight
Pressure Rating
25' from any worker
2.31ft

49. Oil is used on a pipe machine to...
1 foot
Backflow preventer
cool and lubricate the die
West of the building

50. What size hole should be cut into a main to saddle ON a smaller pipe?
75 degrees - also 4 to 1
Bight - running end and standing part
To provide movement cause from a change in temperature
The same ID as the branch