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Plumbing Certification

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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 triple-duty valve is installed...
In the hot water heating pumps discharge piping.
To chemically prepare the pieces for soldering
To allow for thermal movement
BCuP - Stands for Brazed Copper Phosphorus

2. Which of the following has the largest inside diameter?
Increase in friction
Immersion sensor
Beam clamp
Schedule 10

3. What is the purpose of the expansion joint in a steam system?
9
The same ID as the branch
Green... think KKelly GREEN
To provide movement cause from a change in temperature

4. What does a condenser do?
Above the main
On high side of the system and turns gas to liquid.
Type K
Up and Down

5. Calculate head pressure in a section of vertical pipe?
Not to scale - does not show locations of equipment. It shows pipe size and flow.
30 Degrees
steam and condensate flowing in the same direction
Height * .433 = psig

6. OD for 1/2'(inch)

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7. A Hartford loop is used for...
Protection for loss of water in the boiler.
true isometric
bowline on a bight
Down Stream

8. If the architectural scale is 1/4'(inch) equals 1 foot - the ratio would be...
soft tempered
Valve
1:48 - because 1/4 of an inch is 1/48th of a foot
Mechanical return is used.

9. The color code for type M copper is...
Red.. think M&M is RED
Clean all surfaces
A pry bar
30 Degrees

10. A sling is weakest in which position?
Continuously
All the way to the shoulder
Choked position
2.31ft

11. In a refrigeration system a condensable gas is...
Discharge
2 and 1
Ammonia
3.1416

12. A direct acting thermostat is used to...
Insufficient condensate drainage
Strainer
Increase the pressure when the temperature increases
Provide oxygen barrier - stabilize and direct the force of the arc and to gather impurities in the form of slag.

13. When lifting objects with sharp edges you should use a...
Absolute
Pneumatics
Hydrostatics
Softener

14. Exits from a trench 150' long and 4' deep must be located within how many feet of a worker in the trench?
14.7psia - always in PSI-A
Hydrostatic
25 feet
5 9/16'(inch)

15. What type of flame should be used to cut carbon steel?
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.
Expansion Device
Neutral
discharge

16. Steam in contact with the water it has been generated from is known as ________________ steam.
Pressure rating
Saturated
30 Degrees
Increase the pressure when the temperature increases

17. When brazing for medical gas or refrigeration always...
Flashing
Purge the line when brazing
Fuse
Continuously

18. A rating of 300# refers to a flange's...
ALWAYS
Pressure Rating
Alloying
1

19. A valve on the suction side of the pump should be...
orthographic
zinc
Before the strainer and fully open.
Spiral

20. The specific weight of mercury is...
.075lbs
Hazard prevention and control.
Softens it
.0361

21. Annealing copper...
Softens it
Erratic readings
Down Stream
14.7psia - always in PSI-A

22. In a piping installation allowing for expansion in two directions - how should the anchor(s) and guide(s) be positioned relative to each other?
4 times
Raise the load
Guide - Anchor - Guide
Loosen the far bolts first

23. For an extension ladder to be at the correct angle for safe use on a working surface 20ft high. The ladder must be located how many feet away from the base?
200 lbs
Air Bound
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
return fitting

24. What is not a requirement to size the steam trap on a heating unit?
Condensate pump size
In the hot water heating pumps discharge piping.
Pressuretrol
200 lbs

25. An ejector pump is typically used to pump __________.
West of the building
the type of coating and current
sewage
Mechanical/Thermostatic

26. What instrument is best for measuring vacuum?
On low side of the system and expands liquid to low pressure gas.
200 lbs
14.7 psia
Manometer

27. Why can flux be omitted in a brazed joint?
.491lbs
On low side of the system and expands liquid to low pressure gas.
In the direction of flow
The flux is in the filler material

28. What is on the low side of the vapor compression cycle?
The Evaporator
Schedule 10
DWV
Eccentric reducers - flat on top

29. What is the specific gravity of water?
13/16'(inch)
1
sewage
Capillary action

30. The color code for DWV copper is...
The same OD as the branch
Hazard prevention and control.
9
Yellow.. think Dee Double U is yelloWWW

31. Before attaching regulators to an oxygen cylinder...
blow the valves for a moment
Pressuretrol
Dog Everything
.0361

32. When using a cable come-a-long - what safety device will indicate overloading?
Increase
handle will bend
foot valve
Condensate pump size

33. The centerline of piping in a horizontal plane on an isometric drawing is most generally drawn at __________ degrees from the horizontal.
30 Degrees
8.33lbs
Mechanical return is used.
Before the strainer and fully open.

34. What type of expansion joint does NOT utilize mechanical movement?
Pressure Rating
Expansion loop.
BUT
Prevailing wind speed and direction - environmental concerns - zoning requirements

35. What is the formula to figure the area of a circle?
Remove the packing
radius squared times PI
1/2 BTU
62.4

36. The most that a crane should be loaded is...
30 Degrees
Controller
Insert pipe into fitting and turn 1/4 turn and hold
100% of the rated capacity

37. The color code for type L copper is...
Body belts
Blue... think b-LLLLue
Bumping
3 1/2'(inch)

38. A vent is not needed on a condensate receiver when...
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
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.
Mechanical return is used.
true isometric

39. Which of the following is NOT a reason to use stud bolts instead of machine bolts for bolting flanged piping joints?
The stud bolt is stronger than a machine bolt of the same size and material.
Ball joint - Bellows Joint and Packed Joint
Fuel - Heat - Oxygen
protect worker safety and health

40. Which of the following is the decimal equivalent of 5/8'(inch)
Anchors
.625
Spring hanger
A pry bar

41. The proper way to extinguish a fire is to...
Before the strainer and fully open.
Point at the base and sweep the base with the extinguisher
62.4 pounds
All position

42. Ladders with visible defects - such as broken rungs - cracked side rails - or broken steps must be...
.491lbs
9
NEVER!
Tagged and removed from service.

43. What is the welding position 2 - on the electrode mean?
5 9/16'(inch)
Flat and horizontal positions
200 lbs
231

44. One foot of water exerts...
orthographic
.433psi
Sensor
compression

45. The pipe that connects the steam header to the boiler return connection is the...
MAPP - acetylene - and propane
Forced convection - because the FAN forces convection!
dry expansion
Equalizing line

46. What is the expansion and compression of water vapor in a pump?
protect worker safety and health
6 5/8'(inch)
Cavitation
10 feet

47. 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
galvanized
BUT

48. OSHA was enacted to...
Point at the base and sweep the base with the extinguisher
.075lbs
On low side of the system and expands liquid to low pressure gas.
protect worker safety and health

49. You should never blow your clothes off with oxygen because oxygen is a/an
supporter of combustion
Neutral
Remove any paint or rust.
Immersion sensor

50. What should be done to prepare a flange for the gasket installation?
The flux burns and the joint becomes ineffective
Arrange a wire rope clamp so that the dead end has the U bolts
Pressure rating
Remove any paint or rust.

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Plumbing Certification

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