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. What are the main differences between soldering and brazing?
Green... think KKelly GREEN
radius squared times PI
The temperature that the joints are made - the flux and temperatures of the system
supporter of combustion

2. When a loop is needed at any point between ends of a rope - the proper knot to tie is the...
bowline on a bight
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
set point
foot valve

3. Where is a bourdon tube found?
In a pressure gauge
falls
Vaporization
The stud bolt is stronger than a machine bolt of the same size and material.

4. Steam supply using parallel flow is...
Increase the pressure when the temperature increases
1/2 BTU
steam and condensate flowing in the same direction
Red.. think M&M is RED

5. The symbol for pi is equivalent to...
7.48
ALWAYS
Type K
3.1416

6. A float and thermostatic trap is a...
Before the strainer and fully open.
Mechanical/Thermostatic
Flash Tank
blow the valves for a moment

7. A diamond on an instrumentation loop diagram encloses information concerning...
212 degrees F
7.48
Set point
Pressure rating

8. What is used to soften PVC and remove the gloss?
Remote bulb
The flux burns and the joint becomes ineffective
Primer
Divide the diameter by half 4 times - put the 2nd and 4th number together to get the answer. Example - 6'(inch) 45 would be - 6 - 3 - 1 1/2 and 3/4. Answer 3 3/4'(inch)

9. When loosening the bolts on a flange one should...
Cavitation
4 to 20 milliamps
Loosen the far bolts first
On high side of the system and turns gas to liquid.

10. A device that mechanically attaches to the side of a flange on a beam is called a...
Down Stream
Height * .433 = psig
7.48
Beam clamp

11. What type of valve should be used to bypass a control valve?
After cutting
1728
Globe valve
7.0

12. What is the maximum pressure for an acetylene hose?
15 PSI
Pipe penetration
8.33 pounds
2 3/8'(inch)

13. The treatment of liquids at rest is known as...
maximum rated capacity
None
Hydrostatics
All position

14. The pipe that connects the steam header to the boiler return connection is the...
Bight - running end and standing part
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
Point at the base and sweep the base with the extinguisher
Equalizing line

15. Which rigging configuration has the greatest sling strength?
7.0
Basket
Remove the packing
Insufficient condensate drainage

16. What effect does the fill pressure (static) have on a closed loop plumbing system?
Center of the pipe
Insufficient condensate drainage
34 feet
None

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

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18. OD for 3'(inch)

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19. Which one of the following measures and takes action?
Hydrostatic
Alloying
Controller
Expansion Device

20. A condensate receiver is used when...
When a large volume of condensate is generated
1/2 BTU
Conduction - convection and radiant.
4 to 20 milliamps

21. The main cause of undercutting is...
hydrometer
Flash Tank
Too fast of a travel rate
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

22. Standard atmospheric pressure at sea level is _____...
Increase
Ground Fault Circuit Interrupter
Yellow.. think Dee Double U is yelloWWW
14.7 psia

23. The treatment of liquids in motion is known as...
Roller hangers
Protection for loss of water in the boiler.
Hydraulics
.135 cu ft

24. Why is it necessary to use roller hangers?
The science of heat transfer using water.
To allow for thermal movement
Never
ALWAYS

25. The density of water is...
62.4
Expansion loop.
(Total Height - Elevation) * .433 = psig
231

26. The color code for type K copper is...
Green... think KKelly GREEN
Flash Tank
.707
Ball joint - Bellows Joint and Packed Joint

27. An up-feed steam heating system has the heating units...
The flux burns and the joint becomes ineffective
Positive
lower hook
Above the main

28. What is the standard pressure range for a pneumatic signal?
3 to 15 psi
4 to 20 milliamps
100% of the rated capacity
Expansion = Constant per 100ft multiplied by (Final Temp- Starting Temp) Example: 380' steel pipe (.0305 constant) is heated from 62 degrees to 171 degrees - how much did the pipe expand? Formula: .0305 * 3.8 (171-62) = 3 5/16'(inch)

29. When arranging weld coupons for testing position 6G...
Hydrostatic
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
In a pressure gauge
Axis of pipe should be on a 45 degree

30. The amount of heat it takes to raise one pound of water one degree Fahrenheit is known as a...
BUT
lower hook
Discharge
Dry expansion type

31. An oil separator is required on systems using...
1/2 BTU
Mechanical/Thermostatic
Ammonia
Down Stream

32. 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...
protect worker safety and health
Flash Tank
Capillary action
sewage

33. An increase in pressure will cause the boiling point of water to ________...
Fuse
Increase
near the middle of the jaws
Expansion Device

34. The leading cause of on-the-job deaths in the construction industry is _______________.
Insufficient condensate drainage
the employer
30 Degrees
falls

35. What is the welding position 1 - on the electrode mean?
62.4 pounds
Axis of pipe should be on a 45 degree
14.7 psia
All position

36. A valve on the suction side of the pump should be...
1/2 BTU
Before the strainer and fully open.
A pry bar
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.

37. A dielectric fitting should be used on...
8.33 pounds
steel to copper joints
30 Degrees
2.31ft

38. How far should a copper tube be inserted into a cup for a brazed joint?
.491lbs
All the way to the shoulder
Height * .433 = psig
NEVER!

39. What does GFCI stand for?
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.
Arrange a wire rope clamp so that the dead end has the U bolts
soft tempered
Ground Fault Circuit Interrupter

40. A _______________ reamer should NOT be used with power operated pipe threading equipment
3 to 15 psi
Flashing
Spiral
75 degrees - also 4 to 1

41. What causes pressure drop?
Saturated
Increase in friction
All the way to the shoulder
Flat position only

42. What is the formula to figure the area of a circle?
Hydrostatic
radius squared times PI
Forced convection - because the FAN forces convection!
steam and condensate flowing in the same direction

43. What causes water hammer?
near the middle of the jaws
1728
Insufficient condensate drainage
.7854 x D squared

44. A concentric reducer could be used to connect to a horizontal pump _______________ line.
Two Hole
Absolute
Discharge
Clean all surfaces

45. What occurs in a flash tank?
Alloying
Large volumes of condensate flash back to liquid in the tank so it removes trapped steam from the condensate.
Positive
Set point

46. When using a cable come-a-long - what safety device will indicate overloading?
galvanized
NEVER!
Hazard prevention and control.
handle will bend

47. When gripping a pipe with a pipe wrench - the wrench should be adjusted so the pipe is...
The tubing has been cleaned for oxygen service
250 degrees
near the middle of the jaws
Set point

48. The change in state from solid to liquid is known as...
Before the strainer and fully open.
Fusion
Pipe strain
compression

49. Which of the following has the largest inside diameter?
Purge the line when brazing
Schedule 10
Two Hole
lower hook

50. Which of the following is sometimes used as a shielding gas in the GTAW process?
1728
200 lbs
Argon
Cavitation