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. A sling is weakest in which position?
In the direction of flow
To reduce the pressure from the cylinders to safe and workable pressures
Choked position
cool and lubricate the die

2. One atmosphere is equal to...
Globe valve
14.7psia - always in PSI-A
Sensor
Ground Fault Circuit Interrupter

3. What does the crane signal with the index finger pointed forward in a swirling motion signal?
OD
.707
true isometric
Raise the load

4. What is the main reason for the taper on a pipe thread?
Too fast of a travel rate
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
The system temperature - thermal and dynamic movement of the pipe and vibration.
Insure progressively tighter fit

5. On a centrifugal pump what is rotated by the motor?
The impeller
2 and 1
8.33lbs
Flooded

6. A _______________ reamer should NOT be used with power operated pipe threading equipment
Point thumb up
Spiral
Air
The impeller

7. 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.
5 9/16'(inch)
Manometer
Prevailing wind speed and direction - environmental concerns - zoning requirements

8. What is the function of the covering on the electrodes during the process of '(inch)Shielded Metal Arc Welding'(inch)?
steam and condensate flowing in the same direction
The tensile strength of the rod in PSI times 1 -000
Hazard prevention and control.
Provide oxygen barrier - stabilize and direct the force of the arc and to gather impurities in the form of slag.

9. 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.
The impeller
Notify response team and allow them to rescue.
840
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

10. What is on the low side of the vapor compression cycle?
With the weld at a 45 degree angle
The Evaporator
Hazard prevention and control.
Hydraulics

11. The face to center measurement of any welded angle fitting equals...
tangent 1/2 angle x radius
Eccentric reducers - flat on top
Flashing
West of the building

12. OD for 5'(inch)

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13. What does the stamp Oxy-Med stand for on copper tubing?
Notify response team and allow them to rescue.
the employer
The tubing has been cleaned for oxygen service
Fuel - Heat - Oxygen

14. Which way should the bevel face on an orifice plate?
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)
Raise the load
231
Down Stream

15. The centerline of piping in a horizontal plane on an isometric drawing is most generally drawn at __________ degrees from the horizontal.
DWV
Provide oxygen barrier - stabilize and direct the force of the arc and to gather impurities in the form of slag.
30 Degrees
Remove the packing

16. There are __________ gallons in a cubic foot.
Basket
Solder joints
Expansion Device
7.48

17. What is the formula to figure the area of a circle?
radius squared times PI
1/2 BTU
lower hook
Insufficient condensate drainage

18. Which of the following types of copper tube has the smallest wall thickness?
Conduction - convection and radiant.
Sch 80 Steel pipe
DWV
Absolute

19. An abrasive wheel should never run faster than it...
The same ID as the branch
Yellow.. think Dee Double U is yelloWWW
maximum rated capacity
BCuP - Stands for Brazed Copper Phosphorus

20. When changing pipe sizes in the horizontal supply or return lines of a two-pipe hot water heating system use...
Above the main
lower hook
falls
Eccentric reducers - flat on top

21. What type of sensor is directly in the process stream?
Insert pipe into fitting and turn 1/4 turn and hold
Immersion sensor
Fuel - Heat - Oxygen
On high side of the system and turns gas to liquid.

22. Exits from a trench 150' long and 4' deep must be located within how many feet of a worker in the trench?
25 feet
Pressure Rating
Above the main
To chemically prepare the pieces for soldering

23. A Hartford loop is used for...
A pry bar
Protection for loss of water in the boiler.
.491lbs
the core

24. What is not a requirement to size the steam trap on a heating unit?
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
near the middle of the jaws
Condensate pump size
Yellow.. think Dee Double U is yelloWWW

25. What is the welding position 3 - on the electrode mean?
Flat position only
1 5/16'(inch)
Latent
Crimson... think aCRimson

26. Why is it necessary to use flux on a soldered joint?
dry expansion
Increase
To chemically prepare the pieces for soldering
Choked position

27. What is the welding position 2 - on the electrode mean?
Flat and horizontal positions
Center of the pipe
Argon
Neutral

28. When a loop is needed at any point between ends of a rope - the proper knot to tie is the...
an eccentric reducer flat on top
bowline on a bight
34 feet
Green... think KKelly GREEN

29. The pressure exerted by a liquid at rest is...
Clean all surfaces
Too fast of a travel rate
Hydrostatic
Blue... think b-LLLLue

30. Factors in considering the site selection for a new cooling tower.
In the hot water heating pumps discharge piping.
Softens it
Prevailing wind speed and direction - environmental concerns - zoning requirements
Allow moisture to escape

31. When should a person designated as an attendant attempt to rescue a worker that is trapped?
piping
6 5/8'(inch)
Axis of pipe should be on a 45 degree
Never

32. Which of the following is sometimes used as a shielding gas in the GTAW process?
Argon
Quarter
West of the building
Flat position only

33. The last two digits on an E-6010 electrode specify...
the type of coating and current
To chemically prepare the pieces for soldering
Fuel - Heat - Oxygen
Two Hole

34. What has the largest effect on pump alignment?
piping
radius squared times PI
handle will bend
Pipe strain

35. In a refrigeration system a condensable gas is...
Waterlogged
Flash Tank
Ammonia
protect worker safety and health

36. How do you determine gear ratios?

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37. How much heat is required to raise 1/2 pound of water 1 degree F?
.707
15 Feet
1/2 BTU
The science of heat transfer using water.

38. To determine the travel for a 45 degree rolling offset you would...
Solder joints
Multiply the length of the hypotenuse of the roll and the set by 1.414
The Evaporator
4 to 20 milliamps

39. A fan coil uses ______ to distribute heating or cooling to the space.
radius squared times PI
Forced convection - because the FAN forces convection!
To reduce the pressure from the cylinders to safe and workable pressures
1

40. A direct acting thermostat is used to...
protect worker safety and health
All the way to the shoulder
Increase the pressure when the temperature increases
Flat and horizontal positions

41. The last digit on a welding electrode refers to the __________ of the electrode.
Fusion
Coating
.7854 x D squared
The pump creates a differential in pressure that moves the water.

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

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43. The proper way to extinguish a fire is to...
Raise the load
Ammonia
The science of heat transfer using water.
Point at the base and sweep the base with the extinguisher

44. OD for 1'(inch)

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45. When arranging weld coupons for testing position 6G...
Latent
no valves permitted
Axis of pipe should be on a 45 degree
Primer

46. How much does 1 cubic foot of air weigh?
.075lbs
212 degrees F
Ammonia
Provide oxygen barrier - stabilize and direct the force of the arc and to gather impurities in the form of slag.

47. The best method to ensure that a plastic joint is made properly - you should...
Vaporization
Crimson... think aCRimson
100% of the rated capacity
Insert pipe into fitting and turn 1/4 turn and hold

48. The pipe that connects the steam header to the boiler return connection is the...
Equalizing line
supporter of combustion
Globe valve
3 to 15 psi

49. When is it safe to remove the old packing from a valve that is under pressure?
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 9/16'(inch)
NEVER!
Spring hanger

50. 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.
.7854 x D squared
Dry expansion type
The type of coating and current
West of the building