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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. A thermostatic steam trap that fails in the closed position would cause a heating unit to become...
Insufficient condensate drainage
Waterlogged
dry expansion
take-off must be subtracted from the end-to-center measurement.

2. The specific gravity of a liquid can only be measured using the following instrument...
250 degrees
.7854 x D squared
Ammonia
hydrometer

3. What is the standard for an electronic signal?
4 to 20 milliamps
A pry bar
Green... think KKelly GREEN
Increase

4. What size hole should be cut into a main to saddle IN a smaller pipe?
The same OD as the branch
Not to scale - does not show locations of equipment. It shows pipe size and flow.
The flux burns and the joint becomes ineffective
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

5. The final step in the galvanizing of pipe is to dip the pipe into a bath of molten _________?
Softens it
62.4lbs
Hydrostatics
zinc

6. The amount of heat necessary bring about a change of state from solid to liquid or liquid to gas is known as _______________ heat.
steel to copper joints
Latent
Capillary action
Magnesium

7. 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.
25 feet
Dry expansion type
Blue... think b-LLLLue
Pressure Rating

8. The type of valve permitted downstream of a temperature and pressure relief valve on a water heater is...
Beam clamp
steel to copper joints
no valves permitted
Snubber

9. How much heat is required to raise 1/2 pound of water 1 degree F?
The impeller
1/2 BTU
Before the strainer and fully open.
Sch 80 Steel pipe

10. What is the purpose of the oxygen and acetylene regulators?
To provide movement cause from a change in temperature
The flux is in the filler material
Hydrostatic
To reduce the pressure from the cylinders to safe and workable pressures

11. The sum of atmospheric and gauge pressure is known as __________ pressure.
Blue... think b-LLLLue
Absolute
The flux is in the filler material
Pneumatics

12. What are the main differences between soldering and brazing?
1/2 BTU
The temperature that the joints are made - the flux and temperatures of the system
steel to copper joints
Down Stream

13. The anode rod used in a hot water heater to protect it from corrosion is made of...
Axis of pipe should be on a 45 degree
Magnesium
Green... think KKelly GREEN
Increase the pressure when the temperature increases

14. A float and thermostatic trap is a...
13/16'(inch)
Mechanical/Thermostatic
1728
7.0

15. Which way should the bevel face on an orifice plate?
Pressure Rating
Down Stream
Neutral
30 Degrees

16. To stop all crane movement the ______ signal should be used.
blow the valves for a moment
the core
Dog Everything
take-off must be subtracted from the end-to-center measurement.

17. If you double pipe size the carrying capacity is increased...
Height * .433 = psig
The flux burns and the joint becomes ineffective
compression
4 times

18. The device that controls the pressure in a low pressure steam boiler is called a...
4 to 20 milliamps
Absolute
10 feet
Pressuretrol

19. A dielectric fitting should be used on...
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.
steel to copper joints
OD
The same OD as the branch

20. A valve on the suction side of the pump should be...
.135 cu ft
Before the strainer and fully open.
BCuP - Stands for Brazed Copper Phosphorus
1728

21. Which of the following is NOT a reason for using cutting oil when threading pipe?
3 1/2'(inch)
To protect the threads from rust.
Remove any paint or rust.
Tagged and removed from service.

22. What does the crane signal with the index finger pointed forward in a swirling motion signal?
Pressuretrol
Raise the load
compression
supporter of combustion

23. Standard atmospheric pressure at sea level is _____...
With the weld at a 45 degree angle
Air
14.7 psia
62.4 pounds

24. When should a person designated as an attendant attempt to rescue a worker that is trapped?
Body belts
Never
take-off must be subtracted from the end-to-center measurement.
Alloying

25. A device that mechanically attaches to the side of a flange on a beam is called a...
The type of coating and current
840
Beam clamp
Discharge

26. In the cooling cycle - which component throttles the flow of refrigerant?
Expansion Device
an eccentric reducer flat on top
Not to scale - does not show locations of equipment. It shows pipe size and flow.
Large end to smaller end to center(bull)

27. To assemble a 4 bolt flange...
Flat position only
tangent 1/2 angle x radius
Raise the load
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.

28. One pound of water pressure is equal to...
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)
3.1416
tangent 1/2 angle x radius
2.31ft

29. OD for 1'(inch)

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30. What type of valve should be used to bypass a control valve?
Globe valve
Sch 40
Center of the pipe
13/16'(inch)

31. What is capillary action?
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
compression
The flow of a liquid into a small space
None

32. Which one of the following alloys does not require flux when brazing copper to copper joints?
Alloying
BCuP - Stands for Brazed Copper Phosphorus
Basket
Flat position only

33. Oil is used on a pipe machine to...
Bumping
Controller
cool and lubricate the die
Absolute

34. How do you determine gear ratios?

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35. 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.
840
Large volumes of condensate flash back to liquid in the tank so it removes trapped steam from the condensate.
Positive
blow the valves for a moment

36. What type of expansion joint utilizes mechanical movement?
Air
Ball joint - Bellows Joint and Packed Joint
Remove any paint or rust.
true isometric

37. The color code for ACR copper is...
231
34 feet
radius squared times PI
Crimson... think aCRimson

38. What is the purpose for a weep hole in a saddle pad?
Allow moisture to escape
Type K
falls
orthographic

39. Soldered joints should never be used on systems above...
.707 x Travel
.433psi
250 degrees
Positive

40. Which of the following types of copper tube has the smallest wall thickness?
Immersion sensor
The science of heat transfer using water.
25' from any worker
DWV

41. The letters MSDS stand for...
Fusion
2 3/8'(inch)
cool and lubricate the die
Material Safety Data Sheet

42. One foot of water exerts...
62.4
tangent 1/2 angle x radius
Pneumatics
.433psi

43. To raise the boom of a crane you would...
Point thumb up
Prevailing wind speed and direction - environmental concerns - zoning requirements
8 5/8'(inch)
Schedule 10

44. In a piping installation allowing for expansion in two directions - how should the anchor(s) and guide(s) be positioned relative to each other?
When a large volume of condensate is generated
Guide - Anchor - Guide
The type of coating and current
lower hook

45. The ______ is used to protect the weld puddle from contamination in the SMAW process.
Flux
3 1/2'(inch)
Increase in friction
Hydraulics

46. When a flux joint is overheated it will not...
Climbing the cross braces.
Hydrostatics
13/16'(inch)
Fuse

47. Which of the following is a key element of a comprehensive safety and health program?
Schedule 10
Hazard prevention and control.
.625
Spiral

48. The last two digits on an E-6010 electrode specify...
the type of coating and current
In the direction of flow
62.4
Remove any paint or rust.

49. What type of sensor is directly in the process stream?
.707
Flat and horizontal positions
8.33lbs
Immersion sensor

50. When gripping a pipe with a pipe wrench - the wrench should be adjusted so the pipe is...
near the middle of the jaws
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)
steam and condensate flowing in the same direction
Spring hanger

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Plumbing Certification

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