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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 system which the refrigerant is in the shell and cools the fluid in the tubes is...
5 9/16'(inch)
Flooded
Mechanical/Thermostatic
Flat position only

2. What is the purpose of the expansion joint in a steam system?
Eccentric reducer (flat on top)
To provide movement cause from a change in temperature
DWV
Waterlogged

3. What type of flame should be used to cut carbon steel?
Neutral
.135 cu ft
Crimson... think aCRimson
Conduction - convection and radiant.

4. The density of 1 cubic inch of Mercury is...
13/16'(inch)
4 to 20 milliamps
Pressuretrol
.491lbs

5. A dielectric fitting should be used on...
steel to copper joints
Manometer
an eccentric reducer flat on top
In a pressure gauge

6. What is the formula to figure the area of a circle?
On high side of the system and turns gas to liquid.
radius squared times PI
Above the main
no valves permitted

7. The letters MSDS stand for...
Material Safety Data Sheet
4 1/2'(inch)
Loosen the far bolts first
.707

8. What is the welding position 1 - on the electrode mean?
All position
West of the building
On high side of the system and turns gas to liquid.
1.5

9. Since _______________ is virtually incompressible - pressure has little effect on its volume.
Water
Sch 80 Steel pipe
7.48
Raise the load

10. There are __________ gallons in a cubic foot.
14'(inch)
1
Multiply the length of the hypotenuse of the roll and the set by 1.414
7.48

11. What is the expansion and compression of water vapor in a pump?
Cavitation
Down Stream
piping
hydrometer

12. A mixing valve has ___ inlets and ___ outlets.
BUT
To allow for thermal movement
Mechanical return is used.
2 and 1

13. What is installed after the isolation valve and before the trap union on a standard trap assembly?
Strainer
Sch 80 Steel pipe
Primer
The pump creates a differential in pressure that moves the water.

14. A device that mechanically attaches to the side of a flange on a beam is called a...
Beam clamp
Anchors
25' from any worker
NEVER!

15. To figure the end-to-end measurement of a piece of pipe when the end-to-end center measurement is known the...
Ground Fault Circuit Interrupter
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
4 1/2'(inch)
take-off must be subtracted from the end-to-center measurement.

16. When is it safe to remove the old packing from a valve that is under pressure?
Basket
2 3/8'(inch)
NEVER!
10 feet

17. When a liquid changes immediately to a vapor it is called...
Flat and horizontal positions
Flashing
62.4lbs
Before the strainer and fully open.

18. A triple-duty valve is installed...
In the hot water heating pumps discharge piping.
None
near the middle of the jaws
Expansion loop.

19. What causes water to move in a Hydronic system?
Thermostatic - Thermodynamic and Mechanical
foot valve
2.31ft
The pump creates a differential in pressure that moves the water.

20. OD for 2'(inch)

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21. What type of expansion joint utilizes mechanical movement?
Ball joint - Bellows Joint and Packed Joint
3 1/2'(inch)
The same OD as the branch
Body belts

22. How many 2'(inch) pipes can be supplied from a 6'(inch) header?
9
Flux
Raise the load
Erratic readings

23. The face to center measurement of any welded angle fitting equals...
foot valve
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)
tangent 1/2 angle x radius
Insert pipe into fitting and turn 1/4 turn and hold

24. When a loop is needed at any point between ends of a rope - the proper knot to tie is the...
bowline on a bight
Globe
5 9/16'(inch)
Before the strainer and fully open.

25. Where is a bourdon tube found?
In a pressure gauge
When a large volume of condensate is generated
180
take-off must be subtracted from the end-to-center measurement.

26. The treatment of liquids at rest is known as...
Material Safety Data Sheet
Valve
Hydrostatics
Increase the pressure when the temperature increases

27. The last digit on a welding electrode refers to the __________ of the electrode.
Coating
Valve
OD
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

28. The device that controls the pressure in a low pressure steam boiler is called a...
Pressuretrol
None
the type of coating and current
Flashing

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

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30. The pressure exerted by a liquid at rest is...
Magnesium
The tensile strength of the rod in PSI times 1 -000
Hydrostatic
.075lbs

31. To determine the set on a 45 degree offset you would multiply the travel by...
.707
Increase the pressure when the temperature increases
7.0
Softener

32. One cubic foot of water weighs?
Equalizing line
Body belts
Hazard prevention and control.
62.4 pounds

33. Which of the following is NOT acceptable as part of a personal fall arrest system?
Body belts
Erratic readings
Material Safety Data Sheet
Condensate pump size

34. What should be done to prepare a flange for the gasket installation?
Spiral Wound
Remove any paint or rust.
Snubber
Spiral

35. Calculate head pressure of a vertical pipe at specific elevations.
(Total Height - Elevation) * .433 = psig
The stud bolt is stronger than a machine bolt of the same size and material.
In a pressure gauge
steel to copper joints

36. Which component in a closed control loop is the primary element?
ALWAYS
NEVER!
9
Sensor

37. What are 3 fuel gases used for heating pipe or tubing?
Groove
MAPP - acetylene - and propane
25 feet
Insure progressively tighter fit

38. In a refrigeration system a condensable gas is...
orthographic
Capillary action
Ammonia
The tensile strength of the rod in PSI times 1 -000

39. A vent is not needed on a condensate receiver when...
Material Safety Data Sheet
In the direction of flow
Mechanical return is used.
West of the building

40. An up-feed steam heating system has the heating units...
Above the main
Primer
dry expansion
Clove hitch with a half hitch

41. What is the sum of all angles in a triangle?
.625
Capillary action
Groove
180

42. What is the weakest part of a chain hoist?
Flat and horizontal positions
2 and 1
lower hook
The same ID as the branch

43. A fan coil uses ______ to distribute heating or cooling to the space.
15 PSI
Level the 90 in horizontal position determine inside arc - backside arc and face to center dimensions for 60 degree elbow - mark and cut
Eccentric reducer (flat on top)
Forced convection - because the FAN forces convection!

44. Use of air as a power source is known as...
Level the 90 in horizontal position determine inside arc - backside arc and face to center dimensions for 60 degree elbow - mark and cut
Pneumatics
The Evaporator
1.25'(inch)

45. Steam supply using parallel flow is...
Mechanical return is used.
true isometric
.075lbs
steam and condensate flowing in the same direction

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

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47. 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.
Ammonia
Dry expansion type
hydrometer
250 degrees

48. When brazing for medical gas or refrigeration always...
Flat and horizontal positions
Ammonia
Purge the line when brazing
Spring hanger

49. The type of drawing that most closely resembles an object as the eye would see it is referred to as a/an __________ drawing.
the type of coating and current
840
14.7psia - always in PSI-A
true isometric

50. The combining of more than one metal is...
Waterlogged
Hydrostatic
Alloying
1728