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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. The purpose of the foot switch on a power-operated pipe cutting and threading machine is to?

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2. 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?
To provide movement cause from a change in temperature
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
no valves permitted
Before the strainer and fully open.

3. What is the best gasket to use on a flanged joint on medium pressure steam?
Two Hole
1:48 - because 1/4 of an inch is 1/48th of a foot
Spiral Wound
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.

4. To fabricate a 60 degree elbow from a 90 you would...
Level the 90 in horizontal position determine inside arc - backside arc and face to center dimensions for 60 degree elbow - mark and cut
Bight - running end and standing part
Schedule 10
Air

5. A concentric reducer could be used to connect to a horizontal pump _______________ line.
1
Alloying
15 PSI
discharge

6. Which of the following methods of access to a scaffold is prohibited?
4 1/2'(inch)
Insufficient condensate drainage
1 5/16'(inch)
Climbing the cross braces.

7. When a cranes signaler's hand is pointed up with his finger moving in a circle it means to...
(Total Height - Elevation) * .433 = psig
Erratic readings
The system temperature - thermal and dynamic movement of the pipe and vibration.
Raise the load

8. When should a person designated as an attendant attempt to rescue a worker that is trapped?
The same OD as the branch
The same ID as the branch
Flat position only
Never

9. What occurs in a flash tank?
Large volumes of condensate flash back to liquid in the tank so it removes trapped steam from the condensate.
Manometer
100% of the rated capacity
Hydrostatic

10. 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.
Thermostatic - Thermodynamic and Mechanical
BUT
Spiral Wound

11. Calculate head pressure of a vertical pipe at specific elevations.
The system temperature - thermal and dynamic movement of the pipe and vibration.
protect worker safety and health
Solder joints
(Total Height - Elevation) * .433 = psig

12. The control point adjustment on a receiver is used to change the _______________.
Purge the line when brazing
set point
piping
In the hot water heating pumps discharge piping.

13. OSHA was enacted to...
protect worker safety and health
The impeller
Axis of pipe should be on a 45 degree
.0361

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

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15. Annealing copper...
The system temperature - thermal and dynamic movement of the pipe and vibration.
1 foot
Softens it
sewage

16. The only entity that has the responsibility and authority to appoint the competent person is...
Softener
the employer
Cavitation
.0361

17. 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.
Hydrostatic
Dry expansion type
Sch 40
an eccentric reducer flat on top

18. When a soldered joint is overheated...
3 to 15 psi
Set point
The flux burns and the joint becomes ineffective
8.33 pounds

19. What is the purpose of the expansion joint in a steam system?
To provide movement cause from a change in temperature
Flat position only
Forced convection - because the FAN forces convection!
To chemically prepare the pieces for soldering

20. What does a condenser do?
To allow for thermal movement
NEVER!
.625
On high side of the system and turns gas to liquid.

21. The amount of heat it takes to raise one pound of water one degree Fahrenheit is known as a...
The impeller
Absolute
Height * .433 = psig
BUT

22. A valve on the suction side of the pump should be...
Neutral
Before the strainer and fully open.
180
Bight - running end and standing part

23. What causes pressure drop?
Waterlogged
steam and condensate flowing in the same direction
Increase in friction
OD

24. Since _______________ is virtually incompressible - pressure has little effect on its volume.
7.0
Ground Fault Circuit Interrupter
Water
1.5

25. What should be done to prepare a flange for the gasket installation?
8.33 pounds
Remove any paint or rust.
Choked position
250 degrees

26. The color code for type K copper is...
Green... think KKelly GREEN
36'(inch)
compression
Prevailing wind speed and direction - environmental concerns - zoning requirements

27. The last two digits on an E-6010 electrode specify...
the type of coating and current
When a large volume of condensate is generated
Raise the load
Sch 40

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.
Valve
foot valve
Quarter
Down Stream

29. One gallon of water occupies how many cubic feet?
Notify response team and allow them to rescue.
Guide - Anchor - Guide
.135 cu ft
Pipe penetration

30. The pipe fitting that makes a 180 degree turn is called a/an?
Set point
Provide oxygen barrier - stabilize and direct the force of the arc and to gather impurities in the form of slag.
return fitting
None

31. Where should the high pressure condensate be piped to before entering the receiver?
Flash Tank
8 5/8'(inch)
34 feet
2 3/8'(inch)

32. Soldered joints should never be used on systems above...
Saturated
Arrange a wire rope clamp so that the dead end has the U bolts
250 degrees
sewage

33. The color code for DWV copper is...
Purge the line when brazing
Fusion
Yellow.. think Dee Double U is yelloWWW
Flat and horizontal positions

34. A sling is weakest in which position?
Arrange a wire rope clamp so that the dead end has the U bolts
Choked position
the core
hydrometer

35. The last digit on a welding electrode refers to the __________ of the electrode.
Mechanical return is used.
Ammonia
14'(inch)
Coating

36. One gallon of water weighs?
8.33 pounds
None
840
The temperature that the joints are made - the flux and temperatures of the system

37. What are the main differences between soldering and brazing?
.01745 - 3.1416 - and .7854
To allow for thermal movement
Manometer
The temperature that the joints are made - the flux and temperatures of the system

38. How much heat is required to raise 1/2 pound of water 1 degree F?
To reduce the pressure from the cylinders to safe and workable pressures
1/2 BTU
Mechanical/Thermostatic
BCuP - Stands for Brazed Copper Phosphorus

39. The density of water is...
Insufficient condensate drainage
Tagged and removed from service.
Bight - running end and standing part
62.4

40. You should never blow your clothes off with oxygen because oxygen is a/an
supporter of combustion
Raise the load
Green
10 feet

41. Calculate head pressure in a section of vertical pipe?
Height * .433 = psig
30 Degrees
On high side of the system and turns gas to liquid.
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

42. The treatment of liquids in motion is known as...
Hydraulics
Pressuretrol
tangent 1/2 angle x radius
Point at the base and sweep the base with the extinguisher

43. A direct acting thermostat is used to...
Increase the pressure when the temperature increases
8 5/8'(inch)
Clean all surfaces
Red.. think M&M is RED

44. The anode rod used in a hot water heater to protect it from corrosion is made of...
Level the 90 in horizontal position determine inside arc - backside arc and face to center dimensions for 60 degree elbow - mark and cut
Body belts
Magnesium
Latent

45. Steam supply using parallel flow is...
Green... think KKelly GREEN
Flashing
steam and condensate flowing in the same direction
Globe valve

46. The weight of 1 cubic foot of water is...
Two Hole
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)
62.4lbs
Type K

47. What is the main reason for the taper on a pipe thread?
cool and lubricate the die
100% of the rated capacity
Insure progressively tighter fit
Protection for loss of water in the boiler.

48. OD for 5'(inch)

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49. Oil is used on a pipe machine to...
Mechanical return is used.
Loosen the far bolts first
cool and lubricate the die
Spiral Wound

50. The amount of heat necessary bring about a change of state from solid to liquid or liquid to gas is known as _______________ heat.
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
On high side of the system and turns gas to liquid.
Latent
1.25'(inch)

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Plumbing Certification

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