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. What is installed after the isolation valve and before the trap union on a standard trap assembly?
NEVER!
Strainer
Provide oxygen barrier - stabilize and direct the force of the arc and to gather impurities in the form of slag.
OD


2. What is the formula to calculate thermal expansion?

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3. Ladders with visible defects - such as broken rungs - cracked side rails - or broken steps must be...
Vaporization
In a pressure gauge
Tagged and removed from service.
BUT


4. The color code for ACR copper is...
Saturated
.0361
Crimson... think aCRimson
Green


5. The best method to ensure that a plastic joint is made properly - you should...
Thermostatic - Thermodynamic and Mechanical
After cutting
Insert pipe into fitting and turn 1/4 turn and hold
8.33lbs


6. A vent is not needed on a condensate receiver when...
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
100% of the rated capacity
Forced convection - because the FAN forces convection!
Mechanical return is used.


7. Which one of the following measures and takes action?
14.7 psia
62.4lbs
Controller
Dry expansion type


8. What is the standard for an electronic signal?
4 to 20 milliamps
no valves permitted
true isometric
.135 cu ft


9. When selecting a hanger for a piping system you should consider...
West of the building
The system temperature - thermal and dynamic movement of the pipe and vibration.
falls
Steam


10. What is the expansion and compression of water vapor in a pump?
Positive
Cavitation
1.5
4 1/2'(inch)


11. What is the welding position 3 - on the electrode mean?
Protection for loss of water in the boiler.
Continuously
blow the valves for a moment
Flat position only


12. To sense the temperature remotely from the thermostat location you would use...
Backflow preventer
Arrange a wire rope clamp so that the dead end has the U bolts
The tensile strength of the rod in PSI times 1 -000
Remote bulb


13. What size hole should be cut into a main to saddle IN a smaller pipe?
Tagged and removed from service.
The same OD as the branch
Pneumatics
.01745 - 3.1416 - and .7854


14. The weight of 1 cubic foot of water is...
Purge the line when brazing
supporter of combustion
Snubber
62.4lbs


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

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16. What type of expansion joint does NOT utilize mechanical movement?
Red.. think M&M is RED
Condensate pump size
Expansion loop.
With the weld at a 45 degree angle


17. What is not a requirement to size the steam trap on a heating unit?
Notify response team and allow them to rescue.
7.48
Condensate pump size
Insufficient condensate drainage


18. A neutral reading on the PH scale is...
.491lbs
3 to 15 psi
The same ID as the branch
7.0


19. What is used to soften PVC and remove the gloss?
Mechanical return is used.
In the direction of flow
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
Primer


20. OD for 2'(inch)

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21. What causes water hammer?
Spiral
Insufficient condensate drainage
.075lbs
Hydraulics


22. Which of the following types of clamps are used to dampen a pipe's movement?
the type of coating and current
Allow moisture to escape
None
Snubber


23. When brazing for medical gas or refrigeration always...
With the weld at a 45 degree angle
Purge the line when brazing
Absolute
5 9/16'(inch)


24. A vertical line in an isometric drawing represents...
(Total Height - Elevation) * .433 = psig
Schedule 10
Up and Down
1 5/16'(inch)


25. If a horizontal pipe connecting to the suction side of a pump requires a reducer - it should be connected with...
In the direction of flow
Pneumatics
an eccentric reducer flat on top
.0361


26. If a pump is operating under static suction lift conditions - a __________ may be installed in the suction line to avoid losing the pump's prime each time the pump shuts off.
The same OD as the branch
Prevailing wind speed and direction - environmental concerns - zoning requirements
foot valve
Erratic readings


27. What is the weakest part of a chain hoist?
Green... think KKelly GREEN
In the hot water heating pumps discharge piping.
lower hook
The flux is in the filler material


28. Exits from a trench 150' long and 4' deep must be located within how many feet of a worker in the trench?
Tagged and removed from service.
.01745 - 3.1416 - and .7854
25 feet
Pressure rating


29. Which rigging configuration has the greatest sling strength?
840
Basket
Neutral
radius squared times PI


30. When lifting objects with sharp edges you should use a...
The tubing has been cleaned for oxygen service
Neutral
Softener
The impeller


31. What are the three rope parts used in tying knots and hitches?
Set point
Body belts
Basket
Bight - running end and standing part


32. The best knot to use when lifting pipe vertically is the...
Beam clamp
Clove hitch with a half hitch
piping
200 lbs


33. The sum of atmospheric and gauge pressure is known as __________ pressure.
Eccentric reducer (flat on top)
Absolute
Remote bulb
Type K


34. When should a person designated as an attendant attempt to rescue a worker that is trapped?
The pump creates a differential in pressure that moves the water.
Beam clamp
Never
the type of coating and current


35. Which of the following is the decimal equivalent of 5/8'(inch)
DWV
Point thumb up
steam and condensate flowing in the same direction
.625


36. A system which the refrigerant is in the shell and cools the fluid in the tubes is...
1/2 BTU
Anchors
The type of coating and current
Flooded


37. 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.
Remove any paint or rust.
Spiral Wound
The pump creates a differential in pressure that moves the water.
840


38. Which is the correct formula for the area of a circle?
return fitting
.7854 x D squared
A pry bar
an eccentric reducer flat on top


39. A simple example of a lever is...
A pry bar
Schedule 10
Flooded
Hydrostatics


40. An exit from a trench should be no more than...

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41. Why is it necessary to use roller hangers?
To allow for thermal movement
Never
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.
Not to scale - does not show locations of equipment. It shows pipe size and flow.


42. What should be done first when preparing a copper joint?
Clean all surfaces
34 feet
14.7psia - always in PSI-A
Its cheaper!


43. OD for 1/2'(inch)

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44. The density of water is...
62.4 pounds
cool and lubricate the die
Coating
62.4


45. The color code for type M copper is...
Absolute
Red.. think M&M is RED
1
With the weld at a 45 degree angle


46. A concentric reducer could be used to connect to a horizontal pump _______________ line.
840
Discharge
75 degrees - also 4 to 1
On high side of the system and turns gas to liquid.


47. How high must you extend a ladder above the roof or deck?

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48. The last two digits on an E-6010 electrode specify
Argon
Strainer
The type of coating and current
The impeller


49. Momentarily closing the starting switch to check the rotation of the pump is known as __________ the pump.
Cavitation
Above the main
Bumping
The flow of a liquid into a small space


50. Which of the elements of a wire rope aid in absorbing '(inch)Shock Loads'(inch)?
the core
4 to 20 milliamps
blow the valves for a moment
Type K