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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. Oil is used on a pipe machine to...
Level the 90 in horizontal position determine inside arc - backside arc and face to center dimensions for 60 degree elbow - mark and cut
Green... think KKelly GREEN
the core
cool and lubricate the die

2. What is the welding position 2 - on the electrode mean?
Flat and horizontal positions
Remove any paint or rust.
10 feet
Water

3. The type of drawing that most closely resembles an object as the eye would see it is referred to as a/an __________ drawing.
Valve
Fuel - Heat - Oxygen
Its cheaper!
true isometric

4. An abrasive wheel should never run faster than it...
62.4
2.31ft
maximum rated capacity
62.4 pounds

5. The 6G welding position is...
Pressuretrol
With the weld at a 45 degree angle
Saturated
All the way to the shoulder

6. When a cranes signaler's hand is pointed up with his finger moving in a circle it means to...
Hydraulics
The flux burns and the joint becomes ineffective
Fuel - Heat - Oxygen
Raise the load

7. What does the stamp Oxy-Med stand for on copper tubing?
In a pressure gauge
100% of the rated capacity
The tubing has been cleaned for oxygen service
DWV

8. What has the largest effect on pump alignment?
Pipe strain
250 degrees
62.4 pounds
Hydrostatic

9. To stop all crane movement the ______ signal should be used.
Dog Everything
Insufficient condensate drainage
Hydrostatics
Argon

10. The type of drawing that views a building by looking directly at the front - top and side is referred to as a/an ___________ drawing.
To reduce the pressure from the cylinders to safe and workable pressures
orthographic
Height * .433 = psig
Ammonia

11. The type of valve permitted downstream of a temperature and pressure relief valve on a water heater is...
Bight - running end and standing part
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)
compression
no valves permitted

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
Height * .433 = psig
15 PSI
34 feet

13. Name the three methods of transferring heat.
Schedule 10
blow the valves for a moment
Insert pipe into fitting and turn 1/4 turn and hold
Conduction - convection and radiant.

14. Which of the following is NOT a reason for using cutting oil when threading pipe?
Protection for loss of water in the boiler.
Flux
Remove the packing
To protect the threads from rust.

15. How do you determine gear ratios?

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16. A Hartford loop is used for...
Green
discharge
Protection for loss of water in the boiler.
The system temperature - thermal and dynamic movement of the pipe and vibration.

17. What type of copper tubing joint requires use of a ferrule?
Quarter
Alloying
DWV
compression

18. What size hole should be cut into a main to saddle ON a smaller pipe?
Purge the line when brazing
The same ID as the branch
Pipe strain
The Evaporator

19. The amount of heat it takes to raise one pound of water one degree Fahrenheit is known as a...
Insert pipe into fitting and turn 1/4 turn and hold
Body belts
BUT
Insufficient condensate drainage

20. An ejector pump is typically used to pump __________.
Prevailing wind speed and direction - environmental concerns - zoning requirements
sewage
Remove any paint or rust.
3 1/2'(inch)

21. The treatment of liquids at rest is known as...
sewage
bowline on a bight
Tagged and removed from service.
Hydrostatics

22. To order a reducing tee you should specify the size by...
the core
Large end to smaller end to center(bull)
handle will bend
None

23. A mixing valve has ___ inlets and ___ outlets.
Magnesium
1 5/16'(inch)
2 and 1
When a large volume of condensate is generated

24. The color code for type L copper is...
Flashing
Blue... think b-LLLLue
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
Center of the pipe

25. If a horizontal pipe connecting to the suction side of a pump requires a reducer - it should be connected with...
25 feet
9
Equalizing line
an eccentric reducer flat on top

26. To raise the boom of a crane you would...
NEVER!
galvanized
4 1/2'(inch)
Point thumb up

27. In the cooling cycle - which component throttles the flow of refrigerant?
zinc
Expansion Device
Forced convection - because the FAN forces convection!
8.33lbs

28. 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.
Hydraulics
1/2 BTU
foot valve
Two Hole

29. Exits from a trench 150' long and 4' deep must be located within how many feet of a worker in the trench?
250 degrees
25 feet
take-off must be subtracted from the end-to-center measurement.
13/16'(inch)

30. Which type of orifice plate is designed to measure flow of liquids containing solids?
Segmental
BUT
1 5/16'(inch)
When a large volume of condensate is generated

31. A schematic drawing is...
Valve
Not to scale - does not show locations of equipment. It shows pipe size and flow.
Sensor
To allow for thermal movement

32. When loosening the bolts on a flange one should...
piping
Loosen the far bolts first
1
A pry bar

33. 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
Remove the packing
Fuse
Notify response team and allow them to rescue.

34. One foot of water exerts...
return fitting
Never
.433psi
180

35. What is the welding position 1 - on the electrode mean?
All position
NEVER!
Equalizing line
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.

36. An increase in pressure will cause the boiling point of water to ________...
Increase
Protection for loss of water in the boiler.
pi * radius squared
tangent 1/2 angle x radius

37. What is the weakest part of a chain hoist?
Spiral
.491lbs
Air Bound
lower hook

38. The main cause of undercutting is...
Set point
Too fast of a travel rate
compression
Argon

39. Momentarily closing the starting switch to check the rotation of the pump is known as __________ the pump.
The type of coating and current
Bumping
1728
8 5/8'(inch)

40. When a pipe size is decreased by half - the carrying capacity of the pipe decreases by...
Quarter
set point
protect worker safety and health
5 9/16'(inch)

41. Horizontal steam supply piping should be reduced in size by using...
Eccentric reducer (flat on top)
Flat position only
15 PSI
an eccentric reducer flat on top

42. The color code for ACR copper is...
Crimson... think aCRimson
Eccentric reducers - flat on top
Absolute
Pressure Rating

43. What are the three types of steam traps?
Thermostatic - Thermodynamic and Mechanical
14.7 psia
1
Mechanical return is used.

44. What is the best valve for throttling?
Softens it
15 Feet
Globe
blow the valves for a moment

45. What is the purpose for a weep hole in a saddle pad?
the core
Continuously
1/2 BTU
Allow moisture to escape

46. What is Hydronics?
The science of heat transfer using water.
To chemically prepare the pieces for soldering
MAPP - acetylene - and propane
25' from any worker

47. Guides are used near...
Mechanical/Thermostatic
Anchors
Flashing
Eccentric reducer (flat on top)

48. The color code for type K copper is...
Green... think KKelly GREEN
Expansion Device
Increase in friction
Hazard prevention and control.

49. A neutral reading on the PH scale is...
7.0
Schedule 10
The flux burns and the joint becomes ineffective
Coating

50. The maximum practical suction lift on positive displacement pumps is 22 feet and on centrifugal pumps it is __________ feet.
8.33lbs
When a large volume of condensate is generated
15 Feet
.135 cu ft

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Plumbing Certification

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