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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 gallon of water weighs...
8.33lbs
5 9/16'(inch)
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)
Discharge

2. To fabricate a 60 degree elbow from a 90 you would...
Roller hangers
near the middle of the jaws
Level the 90 in horizontal position determine inside arc - backside arc and face to center dimensions for 60 degree elbow - mark and cut
Softener

3. What causes water hammer?
840
Allow moisture to escape
Absolute
Insufficient condensate drainage

4. What type of valve should be used to bypass a control valve?
15 Feet
Latent
Globe valve
The pump creates a differential in pressure that moves the water.

5. A fan coil uses ______ to distribute heating or cooling to the space.
Red.. think M&M is RED
Forced convection - because the FAN forces convection!
The tubing has been cleaned for oxygen service
In the direction of flow

6. What does the evaporator do?
Pneumatics
steel to copper joints
On low side of the system and expands liquid to low pressure gas.
Magnesium

7. A system which the refrigerant is in the shell and cools the fluid in the tubes is...
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)
MAPP - acetylene - and propane
Flooded
1

8. 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?
the type of coating and current
Too fast of a travel rate
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
On low side of the system and expands liquid to low pressure gas.

9. A _______________ reamer should NOT be used with power operated pipe threading equipment
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)
On high side of the system and turns gas to liquid.
Spiral
212 degrees F

10. The specific weight of mercury is...
Mechanical return is used.
Pipe penetration
5 9/16'(inch)
.0361

11. The sum of atmospheric and gauge pressure is known as __________ pressure.
Climbing the cross braces.
Red.. think M&M is RED
Argon
Absolute

12. To raise the boom of a crane you would...
Coating
discharge
.135 cu ft
Point thumb up

13. One cubic foot of water weighs?
212 degrees F
4 times
near the middle of the jaws
62.4 pounds

14. What is the main reason for the taper on a pipe thread?
Ammonia
Insure progressively tighter fit
14'(inch)
1.5

15. A vertical line in an isometric drawing represents...
Clean all surfaces
Alloying
Before the strainer and fully open.
Up and Down

16. 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.
Sch 40
Sensor
dry expansion
On high side of the system and turns gas to liquid.

17. Condensate lines should be pitched...
Hydrostatics
In the direction of flow
4 1/2'(inch)
Expansion loop.

18. Theoretically - a pump can raise water by suction approximately __________ feet vertically.
To chemically prepare the pieces for soldering
34 feet
Ground Fault Circuit Interrupter
the core

19. Where is a bourdon tube found?
In a pressure gauge
Flat position only
soft tempered
Insufficient condensate drainage

20. What should be done first when preparing a copper joint?
Air
Clean all surfaces
840
Protection for loss of water in the boiler.

21. What is the standard pressure range for a pneumatic signal?
All position
3 to 15 psi
The same ID as the branch
4 1/2'(inch)

22. What are the three types of steam traps?
Down Stream
Thermostatic - Thermodynamic and Mechanical
Fuel - Heat - Oxygen
1.25'(inch)

23. The best method to ensure that a plastic joint is made properly - you should...
Flooded
Conduction - convection and radiant.
Insert pipe into fitting and turn 1/4 turn and hold
Alloying

24. Which of the following types of copper tube has the smallest wall thickness?
The pump creates a differential in pressure that moves the water.
DWV
Magnesium
Prevailing wind speed and direction - environmental concerns - zoning requirements

25. What is the best valve for throttling?
The pump creates a differential in pressure that moves the water.
The same ID as the branch
The Evaporator
Globe

26. On a centrifugal pump what is rotated by the motor?
blow the valves for a moment
.491lbs
The impeller
.707 x Travel

27. What is the expansion and compression of water vapor in a pump?
Cavitation
Prevailing wind speed and direction - environmental concerns - zoning requirements
In the hot water heating pumps discharge piping.
1 foot

28. What has the largest effect on pump alignment?
3 1/2'(inch)
Ground Fault Circuit Interrupter
Pipe strain
Hydraulics

29. What instrument is best for measuring vacuum?
Insure progressively tighter fit
Manometer
Flash Tank
15 PSI

30. To assemble a 4 bolt flange...
34 feet
In the hot water heating pumps discharge piping.
Bight - running end and standing part
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.

31. Exits from a trench 150' long and 4' deep must be located within how many feet of a worker in the trench?
OD
Crimson... think aCRimson
25 feet
The stud bolt is stronger than a machine bolt of the same size and material.

32. What is the standard for an electronic signal?
36'(inch)
4 to 20 milliamps
NEVER!
.491lbs

33. OD for 6'(inch)

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34. Steam condensate lines should use...
Sch 80 Steel pipe
Pipe strain
Latent
4 times

35. What does the stamp Oxy-Med stand for on copper tubing?
Air Bound
BCuP - Stands for Brazed Copper Phosphorus
Basket
The tubing has been cleaned for oxygen service

36. When a flux joint is overheated it will not...
9
.135 cu ft
Green... think KKelly GREEN
Fuse

37. How many 2'(inch) pipes can be supplied from a 6'(inch) header?
Cavitation
9
Protection for loss of water in the boiler.
The stud bolt is stronger than a machine bolt of the same size and material.

38. Which rigging configuration has the greatest sling strength?
Basket
pi * radius squared
Coating
.707 x Travel

39. What does the crane signal with the index finger pointed forward in a swirling motion signal?
7.48
9
Schedule 10
Raise the load

40. Where should the pressure enter a globe valve?
The same OD as the branch
Increase
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)
Forced convection - because the FAN forces convection!

41. The color code for ACR copper is...
BUT
the type of coating and current
Strainer
Crimson... think aCRimson

42. Which of the following is a key element of a comprehensive safety and health program?
Immersion sensor
Red.. think M&M is RED
All the way to the shoulder
Hazard prevention and control.

43. You should never blow your clothes off with oxygen because oxygen is a/an
handle will bend
Expansion Device
supporter of combustion
34 feet

44. When loosening the bolts on a flange one should...
Loosen the far bolts first
To chemically prepare the pieces for soldering
8.33lbs
To reduce the pressure from the cylinders to safe and workable pressures

45. The last two digits on an E-6010 electrode specify...
Guide - Anchor - Guide
the type of coating and current
Waterlogged
Positive

46. A direct acting thermostat is used to...
Increase the pressure when the temperature increases
All position
Flash Tank
Green... think KKelly GREEN

47. How often should the atmosphere be tested in a confined space?
3 to 15 psi
Continuously
no valves permitted
2.31ft

48. A schematic drawing is...
Hydrostatics
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
Not to scale - does not show locations of equipment. It shows pipe size and flow.
Sch 80 Steel pipe

49. What is the welding position 1 - on the electrode mean?
All position
Guide - Anchor - Guide
ALWAYS
Argon

50. What is the purpose of the expansion joint in a steam system?
To provide movement cause from a change in temperature
the employer
After cutting
Valve