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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. In the cooling cycle - which component throttles the flow of refrigerant?
set point
Expansion Device
The same ID as the branch
13/16'(inch)

2. The leading cause of on-the-job deaths in the construction industry is _______________.
Sch 40
250 degrees
falls
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

3. What effect does the fill pressure (static) have on a closed loop plumbing system?
25' from any worker
None
To allow for thermal movement
Sch 80 Steel pipe

4. When selecting a hanger for a piping system you should consider...
Softener
The system temperature - thermal and dynamic movement of the pipe and vibration.
Latent
1.5

5. A simple example of a lever is...
Ammonia
Green... think KKelly GREEN
A pry bar
Insufficient condensate drainage

6. The symbol for pi is equivalent to...
hydrometer
sewage
30 Degrees
3.1416

7. The specific gravity of a gas is relative to the specific weight of _______________ - which has a specific gravity of one.
3 1/2'(inch)
take-off must be subtracted from the end-to-center measurement.
Magnesium
Air

8. One foot of water exerts...
.433psi
The type of coating and current
Arrange a wire rope clamp so that the dead end has the U bolts
When a large volume of condensate is generated

9. A direct acting thermostat is used to...
Increase the pressure when the temperature increases
Guide - Anchor - Guide
.135 cu ft
The type of coating and current

10. The face to center measurement of any welded angle fitting equals...
tangent 1/2 angle x radius
8.33 pounds
Immersion sensor
Divide the diameter by half 4 times - put the 2nd and 4th number together to get the answer. Example - 6'(inch) 45 would be - 6 - 3 - 1 1/2 and 3/4. Answer 3 3/4'(inch)

11. OD for 3'(inch)

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12. The color code for type K copper is...
The pump creates a differential in pressure that moves the water.
Green... think KKelly GREEN
Sch 40
Primer

13. What occurs in a flash tank?
62.4
6 5/8'(inch)
Increase the pressure when the temperature increases
Large volumes of condensate flash back to liquid in the tank so it removes trapped steam from the condensate.

14. When a pipe size is decreased by half - the carrying capacity of the pipe decreases by...
falls
Center of the pipe
Quarter
Raise the load

15. How far should a copper tube be inserted into a cup for a brazed joint?
Raise the load
In the hot water heating pumps discharge piping.
Roller hangers
All the way to the shoulder

16. What does the evaporator do?
Large end to smaller end to center(bull)
Never
To provide movement cause from a change in temperature
On low side of the system and expands liquid to low pressure gas.

17. OD for 1'(inch)

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18. Calculate head pressure of a vertical pipe at specific elevations.
hydrometer
Latent
(Total Height - Elevation) * .433 = psig
The pump creates a differential in pressure that moves the water.

19. What is the sum of all angles in a triangle?
Latent
Positive
Air
180

20. The type of valve permitted downstream of a temperature and pressure relief valve on a water heater is...
.707
no valves permitted
Guide - Anchor - Guide
Raise the load

21. Which of the following types of clamps are used to dampen a pipe's movement?
840
Snubber
Spring hanger
Green

22. 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
Condensate pump size
Ball joint - Bellows Joint and Packed Joint
Magnesium

23. Factors in considering the site selection for a new cooling tower.
Axis of pipe should be on a 45 degree
Flat and horizontal positions
Controller
Prevailing wind speed and direction - environmental concerns - zoning requirements

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
Flooded
The type of coating and current
The flow of a liquid into a small space

25. What are the three rope parts used in tying knots and hitches?
Not to scale - does not show locations of equipment. It shows pipe size and flow.
To chemically prepare the pieces for soldering
The pump creates a differential in pressure that moves the water.
Bight - running end and standing part

26. On a centrifugal pump what is rotated by the motor?
Pressure Rating
1 foot
Point at the base and sweep the base with the extinguisher
The impeller

27. What size hole should be cut into a main to saddle ON a smaller pipe?
piping
The same ID as the branch
Pressuretrol
Quarter

28. If a horizontal pipe connecting to the suction side of a pump requires a reducer - it should be connected with...
an eccentric reducer flat on top
The impeller
25' from any worker
231

29. Zinc chills or metal fume fever are caused from welding on __________ steel.
Condensate pump size
To provide movement cause from a change in temperature
Green
galvanized

30. Before attaching regulators to an oxygen cylinder...
The flux burns and the joint becomes ineffective
dry expansion
blow the valves for a moment
Flat and horizontal positions

31. In a refrigeration system a condensable gas is...
(Total Height - Elevation) * .433 = psig
25 feet
62.4 pounds
Ammonia

32. When a soldered joint is overheated...
The flux burns and the joint becomes ineffective
9
4 times
30 Degrees

33. What is capillary action?
Down Stream
Not to scale - does not show locations of equipment. It shows pipe size and flow.
The flow of a liquid into a small space
2.31ft

34. The anode rod used in a hot water heater to protect it from corrosion is made of...
Magnesium
.0361
14.7 psia
Primer

35. What does a + plus sign mean?
Thermostatic - Thermodynamic and Mechanical
Raise the load
Pipe penetration
Fuel - Heat - Oxygen

36. Both soldered and brazed joints are made by heating a properly prepared joint to the proper temperature and the flowing of a filler metal by means of...
Erratic readings
Capillary action
Pressuretrol
Eccentric reducers - flat on top

37. A valve on the suction side of the pump should be...
Before the strainer and fully open.
Multiply the length of the hypotenuse of the roll and the set by 1.414
West of the building
foot valve

38. 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.
Quarter
15 PSI
Above the main

39. You should never blow your clothes off with oxygen because oxygen is a/an
Spiral
supporter of combustion
Alloying
Climbing the cross braces.

40. Which of the following types of copper tube has the smallest wall thickness?
Its cheaper!
Fusion
DWV
.135 cu ft

41. Capillary action is used in...
1/2 BTU
Solder joints
Anchors
true isometric

42. When using a cable come-a-long - what safety device will indicate overloading?
Softener
no valves permitted
handle will bend
Sensor

43. A vertical line in an isometric drawing represents...
1728
The same ID as the branch
Flash Tank
Up and Down

44. Annealing copper...
Forced convection - because the FAN forces convection!
Softens it
Saturated
Increase

45. With a high pressure valve you should never _____ under pressure.
Above the main
Sch 80 Steel pipe
protect worker safety and health
Remove the packing

46. OD for 5'(inch)

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47. A Hartford loop is used for...
Protection for loss of water in the boiler.
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
To protect the threads from rust.
Raise the load

48. The amount of heat it takes to raise one pound of water one degree Fahrenheit is known as a...
Immersion sensor
lower hook
BUT
100% of the rated capacity

49. An increase in pressure will cause the boiling point of water to ________...
Increase
Sch 80 Steel pipe
Pneumatics
36'(inch)

50. What should be done first when preparing a copper joint?
Point thumb up
1/2 BTU
Vaporization
Clean all surfaces