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. OD for 6'(inch)

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2. What is the standard pressure range for a pneumatic signal?
3 to 15 psi
8.33lbs
1728
Point thumb up


3. On a centrifugal pump what is rotated by the motor?
Pressure rating
Flooded
62.4 pounds
The impeller


4. Which of the following types of copper tube has the smallest wall thickness?
BCuP - Stands for Brazed Copper Phosphorus
DWV
3.1416
On high side of the system and turns gas to liquid.


5. What are 3 fuel gases used for heating pipe or tubing?
Type K
no valves permitted
Raise the load
MAPP - acetylene - and propane


6. The density of water is...
Provide oxygen barrier - stabilize and direct the force of the arc and to gather impurities in the form of slag.
62.4
Flat position only
.491lbs


7. A rating of 150# refers to a flange's...
To provide movement cause from a change in temperature
Crimson... think aCRimson
Pressure rating
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.


8. An ejector pump is typically used to pump __________.
Strainer
62.4
The science of heat transfer using water.
sewage


9. OD for 5'(inch)

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10. What is installed after the isolation valve and before the trap union on a standard trap assembly?
Strainer
true isometric
Large volumes of condensate flash back to liquid in the tank so it removes trapped steam from the condensate.
cool and lubricate the die


11. When selecting a hanger for a piping system you should consider...
Increase in friction
The system temperature - thermal and dynamic movement of the pipe and vibration.
Flashing
Multiply the length of the hypotenuse of the roll and the set by 1.414


12. When brazing for medical gas or refrigeration always...
Large volumes of condensate flash back to liquid in the tank so it removes trapped steam from the condensate.
BCuP - Stands for Brazed Copper Phosphorus
Protection for loss of water in the boiler.
Purge the line when brazing


13. What type of expansion joint utilizes mechanical movement?
25 feet
Eccentric reducers - flat on top
Before the strainer and fully open.
Ball joint - Bellows Joint and Packed Joint


14. Since _______________ is virtually incompressible - pressure has little effect on its volume.
the employer
Water
Two Hole
3.1416


15. When a soldered joint is overheated...
Tagged and removed from service.
.7854 x D squared
Loosen the far bolts first
The flux burns and the joint becomes ineffective


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

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17. When a pipe size is decreased by half - the carrying capacity of the pipe decreases by...
Bumping
Quarter
piping
Raise the load


18. A float and thermostatic trap is a...
Body belts
Clove hitch with a half hitch
Mechanical/Thermostatic
Air Bound


19. What does the G stand for in the 2G - 5G and 6G weld positions?
Pipe strain
Above the main
Groove
Argon


20. To properly align a flange you must perform what is commonly called a ______ hole...
MAPP - acetylene - and propane
Anchors
The same OD as the branch
Two Hole


21. What type of valve should be used to bypass a control valve?
steam and condensate flowing in the same direction
Globe valve
Schedule 10
Erratic readings


22. What causes pressure drop?
Ground Fault Circuit Interrupter
Increase in friction
Latent
compression


23. What are the three types of steam traps?
near the middle of the jaws
Thermostatic - Thermodynamic and Mechanical
Too fast of a travel rate
Softener


24. The face to center measurement of any welded angle fitting equals...
no valves permitted
Expansion Device
OD
tangent 1/2 angle x radius


25. The specific weight of mercury is...
.0361
Globe valve
Pressuretrol
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


26. What is the best gasket to use on a flanged joint on medium pressure steam?
Spiral Wound
Expansion loop.
250 degrees
On low side of the system and expands liquid to low pressure gas.


27. The proper way to extinguish a fire is to...
The science of heat transfer using water.
The same OD as the branch
Point at the base and sweep the base with the extinguisher
.0361


28. What is on the low side of the vapor compression cycle?
The Evaporator
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.
Hydrostatics
62.4 pounds


29. Which of the following methods of access to a scaffold is prohibited?
zinc
Quarter
Climbing the cross braces.
Set point


30. The anode rod used in a hot water heater to protect it from corrosion is made of...
the employer
62.4 pounds
Magnesium
set point


31. In a refrigeration system a condensable gas is...
pi * radius squared
protect worker safety and health
14'(inch)
Ammonia


32. The pipe that connects the steam header to the boiler return connection is the...
Thermostatic - Thermodynamic and Mechanical
Equalizing line
.0361
Capillary action


33. What is the formula to figure take off on a 45 degree elbow?

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34. The best method to ensure that a plastic joint is made properly - you should...
Insert pipe into fitting and turn 1/4 turn and hold
bowline on a bight
Fuse
1/2 BTU


35. A dielectric fitting should be used on...
foot valve
The Evaporator
steel to copper joints
Point at the base and sweep the base with the extinguisher


36. A system which the refrigerant is in the shell and cools the fluid in the tubes is...
Primer
1
Valve
Flooded


37. The color code for DWV copper is...
Cavitation
To protect the threads from rust.
return fitting
Yellow.. think Dee Double U is yelloWWW


38. Steam in contact with the water it has been generated from is known as ________________ steam.
Green
the core
Flat and horizontal positions
Saturated


39. Which way should the bevel face on an orifice plate?
soft tempered
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
Down Stream
6 5/8'(inch)


40. What is the best valve for throttling?
Immersion sensor
Globe
protect worker safety and health
Its cheaper!


41. The color code for type '(inch)K'(inch) copper is?
Segmental
Body belts
Multiply the length of the hypotenuse of the roll and the set by 1.414
Green


42. What are the main differences between soldering and brazing?
The temperature that the joints are made - the flux and temperatures of the system
near the middle of the jaws
Fuel - Heat - Oxygen
Clean all surfaces


43. Which of the following constants are used when working with circles and areas?
The same ID as the branch
.01745 - 3.1416 - and .7854
With the weld at a 45 degree angle
The same OD as the branch


44. When arranging weld coupons for testing position 6G...
take-off must be subtracted from the end-to-center measurement.
Increase
Axis of pipe should be on a 45 degree
The temperature that the joints are made - the flux and temperatures of the system


45. A cooling tower must have a ________ or be open-site.
Groove
Waterlogged
Backflow preventer
Segmental


46. OD for 2'(inch)

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47. The ______ is used to protect the weld puddle from contamination in the SMAW process.
Point at the base and sweep the base with the extinguisher
1
Flux
galvanized


48. The change in state from solid to liquid is known as...
To allow for thermal movement
the employer
Fusion
Air Bound


49. If the architectural scale is 1/4'(inch) equals 1 foot - the ratio would be...
1:48 - because 1/4 of an inch is 1/48th of a foot
.7854 x D squared
Insert pipe into fitting and turn 1/4 turn and hold
Cavitation


50. A Hartford loop is used for...
Protection for loss of water in the boiler.
Large end to smaller end to center(bull)
Thermostatic - Thermodynamic and Mechanical
Insure progressively tighter fit