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. Which of the following is NOT acceptable as part of a personal fall arrest system?
supporter of combustion
To allow for thermal movement
Body belts
The impeller

2. The last digit on a welding electrode refers to the __________ of the electrode.
Purge the line when brazing
The flux is in the filler material
3 1/2'(inch)
Coating

3. One cubic foot of water weighs?
62.4 pounds
1728
30 Degrees
Multiply the length of the hypotenuse of the roll and the set by 1.414

4. A float and thermostatic trap is a...
Hydraulics
galvanized
Flat position only
Mechanical/Thermostatic

5. A guard rail system must withstand a minimum force of __________ pounds.
.01745 - 3.1416 - and .7854
BCuP - Stands for Brazed Copper Phosphorus
Expansion loop.
200 lbs

6. Condensate lines should be pitched...
In the direction of flow
8.33 pounds
Increase in friction
The science of heat transfer using water.

7. The treatment of liquids at rest is known as...
Thermostatic - Thermodynamic and Mechanical
Hydrostatics
Not to scale - does not show locations of equipment. It shows pipe size and flow.
Manometer

8. What is used to soften PVC and remove the gloss?
BUT
Waterlogged
Primer
Loosen the far bolts first

9. The color code for DWV copper is...
The system temperature - thermal and dynamic movement of the pipe and vibration.
West of the building
Yellow.. think Dee Double U is yelloWWW
Anchors

10. Why can flux be omitted in a brazed joint?
BCuP - Stands for Brazed Copper Phosphorus
Softens it
The flux is in the filler material
Green

11. Horizontal steam supply piping should be reduced in size by using...
Provide oxygen barrier - stabilize and direct the force of the arc and to gather impurities in the form of slag.
Material Safety Data Sheet
no valves permitted
Eccentric reducer (flat on top)

12. What does the evaporator do?
With the weld at a 45 degree angle
On low side of the system and expands liquid to low pressure gas.
Segmental
2.31ft

13. When ordering ACR copper specify the size by...
Segmental
Allow moisture to escape
36'(inch)
OD

14. Which of the following is NOT a reason for using cutting oil when threading pipe?
30 Degrees
To protect the threads from rust.
Roller hangers
Remove any paint or rust.

15. Exits from a trench 150' long and 4' deep must be located within how many feet of a worker in the trench?
25 feet
3 to 15 psi
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
62.4 pounds

16. The smallest nominal size DWV copper tube is...

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17. A gallon of water weighs...
OD
8.33lbs
On high side of the system and turns gas to liquid.
Remove any paint or rust.

18. What is the standard pressure range for a pneumatic signal?
the core
3 to 15 psi
no valves permitted
2 3/8'(inch)

19. .433 psig is equal to how high of a water column?
Above the main
Backflow preventer
1 foot
Large volumes of condensate flash back to liquid in the tank so it removes trapped steam from the condensate.

20. To order a reducing tee you should specify the size by...
Red.. think M&M is RED
Large end to smaller end to center(bull)
zinc
Flat and horizontal positions

21. Which is the correct formula for the area of a circle?
8 5/8'(inch)
.7854 x D squared
Clove hitch with a half hitch
.135 cu ft

22. OD for 1'(inch)

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23. What is the best valve for throttling?
Raise the load
Globe
The same OD as the branch
take-off must be subtracted from the end-to-center measurement.

24. What type of flame should be used to cut carbon steel?
Neutral
Pressuretrol
Absolute
Positive

25. In a Hydronic heating system - units at the top of the system not heating are likely to be...
Air Bound
14.7psia - always in PSI-A
The flux burns and the joint becomes ineffective
pi * radius squared

26. When changing pipe sizes in the horizontal supply or return lines of a two-pipe hot water heating system use...
.7854 x D squared
BCuP - Stands for Brazed Copper Phosphorus
Eccentric reducers - flat on top
bowline on a bight

27. What is the main reason for the taper on a pipe thread?
Hydrostatics
the employer
Insure progressively tighter fit
The same OD as the branch

28. The symbol for pi is equivalent to...
3.1416
Level the 90 in horizontal position determine inside arc - backside arc and face to center dimensions for 60 degree elbow - mark and cut
Height * .433 = psig
Sch 80 Steel pipe

29. When a pipe size is decreased by half - the carrying capacity of the pipe decreases by...
Sensor
Above the main
Quarter
2 3/8'(inch)

30. The type of drawing that most closely resembles an object as the eye would see it is referred to as a/an __________ drawing.
true isometric
Dry expansion type
Increase
Remove the packing

31. A neutral reading on the PH scale is...
Positive
Clove hitch with a half hitch
Increase
7.0

32. 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...
Capillary action
8.33lbs
Continuously
7.48

33. A triple-duty valve is installed...
Air Bound
Beam clamp
In the hot water heating pumps discharge piping.
15 Feet

34. Theoretically - a pump can raise water by suction approximately __________ feet vertically.
OD
Hazard prevention and control.
34 feet
Spiral Wound

35. Annealing copper...
The pump creates a differential in pressure that moves the water.
Softens it
5 9/16'(inch)
Red.. think M&M is RED

36. What is the weakest part of a chain hoist?
West of the building
piping
discharge
lower hook

37. What is the sum of all angles in a triangle?
180
3 1/2'(inch)
Clove hitch with a half hitch
8.33lbs

38. An up-feed steam heating system has the heating units...
10 feet
Above the main
62.4lbs
1.25'(inch)

39. The anode rod used in a hot water heater to protect it from corrosion is made of...
lower hook
6 5/8'(inch)
Magnesium
soft tempered

40. Which of the following is NOT a reason to use stud bolts instead of machine bolts for bolting flanged piping joints?
Quarter
4 times
7.0
The stud bolt is stronger than a machine bolt of the same size and material.

41. Calculate head pressure in a section of vertical pipe?
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)
Type K
true isometric
Height * .433 = psig

42. The change in state from a liquid to gas is known as...
4 to 20 milliamps
Hazard prevention and control.
Vaporization
Red.. think M&M is RED

43. The specific weight of mercury is...
soft tempered
.0361
an eccentric reducer flat on top
the employer

44. What type of valve should be used to bypass a control valve?
25 feet
9
Globe valve
To provide movement cause from a change in temperature

45. The color code for ACR copper is...
14'(inch)
The same OD as the branch
8.33 pounds
Crimson... think aCRimson

46. When is it safe to remove the old packing from a valve that is under pressure?
9
lower hook
NEVER!
30 Degrees

47. What are 3 fuel gases used for heating pipe or tubing?
250 degrees
Globe
30 Degrees
MAPP - acetylene - and propane

48. When leaning a ladder against an object - the ladder should be at an approximate angle of __________ degrees.
Raise the load
75 degrees - also 4 to 1
lower hook
Up and Down

49. An ejector pump is typically used to pump __________.
sewage
.491lbs
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
Fuel - Heat - Oxygen

50. What should be done to prepare a flange for the gasket installation?
Set point
Remove any paint or rust.
5 9/16'(inch)
Ball joint - Bellows Joint and Packed Joint