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. The type of drawing that views a building by looking directly at the front - top and side is referred to as a/an ___________ drawing.
3 to 15 psi
15 PSI
orthographic
The temperature that the joints are made - the flux and temperatures of the system


2. Which of the following is the decimal equivalent of 5/8'(inch)
.625
To protect the threads from rust.
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
Waterlogged


3. There are __________ cubic inches in a gallon.
Prevailing wind speed and direction - environmental concerns - zoning requirements
Coating
231
8 5/8'(inch)


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

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5. The device that controls the pressure in a low pressure steam boiler is called a...
Pressuretrol
4 times
Two Hole
After cutting


6. What is the specific gravity of water?
Sch 40
1
Snubber
the employer


7. Which of the following methods of access to a scaffold is prohibited?
Fusion
To protect the threads from rust.
Flat and horizontal positions
Climbing the cross braces.


8. A triple-duty valve is installed...
Hazard prevention and control.
1:48 - because 1/4 of an inch is 1/48th of a foot
In the hot water heating pumps discharge piping.
Schedule 10


9. When a loop is needed at any point between ends of a rope - the proper knot to tie is the...
bowline on a bight
75 degrees - also 4 to 1
blow the valves for a moment
7.0


10. Calculate head pressure of a vertical pipe at specific elevations.
West of the building
Vaporization
14.7 psia
(Total Height - Elevation) * .433 = psig


11. Which component in a closed control loop is the primary element?
4 1/2'(inch)
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
Sensor
The temperature that the joints are made - the flux and temperatures of the system


12. A thermostatic steam trap that fails in the closed position would cause a heating unit to become...
Raise the load
Waterlogged
radius squared times PI
Snubber


13. OD for 4'(inch)

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14. When should a person designated as an attendant attempt to rescue a worker that is trapped?
Solder joints
2 3/8'(inch)
The tubing has been cleaned for oxygen service
Never


15. The 6G welding position is...
The flow of a liquid into a small space
BUT
Yellow.. think Dee Double U is yelloWWW
With the weld at a 45 degree angle


16. When brazing for medical gas or refrigeration always...
Hydraulics
Expansion loop.
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
Purge the line when brazing


17. What is the purpose for a weep hole in a saddle pad?
2 3/8'(inch)
Allow moisture to escape
1728
Center of the pipe


18. The pipe size of a pipe changes from the ID to the OD on what pipe size?

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19. The pipe that connects the steam header to the boiler return connection is the...
near the middle of the jaws
Blue... think b-LLLLue
Vaporization
Equalizing line


20. The color code for type K copper is...
Green... think KKelly GREEN
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
All the way to the shoulder
Eccentric reducers - flat on top


21. What has the largest effect on pump alignment?
Raise the load
2 and 1
radius squared times PI
Pipe strain


22. The letters MSDS stand for...
.433psi
Argon
Provide oxygen barrier - stabilize and direct the force of the arc and to gather impurities in the form of slag.
Material Safety Data Sheet


23. A cooling tower must have a ________ or be open-site.
1 foot
Backflow preventer
Protection for loss of water in the boiler.
Bight - running end and standing part


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

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25. A gallon of water weighs...
840
lower hook
Absolute
8.33lbs


26. What type of hanger uses a spring that splits the rod?
In the hot water heating pumps discharge piping.
Spring hanger
Anchors
Discharge


27. Zinc chills or metal fume fever are caused from welding on __________ steel.
galvanized
Segmental
With the weld at a 45 degree angle
.0361


28. The weight of 1 cubic foot of water is...
1:48 - because 1/4 of an inch is 1/48th of a foot
Air Bound
Basket
62.4lbs


29. What is the sum of all angles in a triangle?
The system temperature - thermal and dynamic movement of the pipe and vibration.
180
25' from any worker
In a pressure gauge


30. To stop all crane movement the ______ signal should be used.
Remove any paint or rust.
None
5 9/16'(inch)
Dog Everything


31. One atmosphere is equal to...
14.7psia - always in PSI-A
Raise the load
1728
Forced convection - because the FAN forces convection!


32. A rating of 150# refers to a flange's...
Softener
Pressure rating
Increase
Immersion sensor


33. Where is a bourdon tube found?
2 3/8'(inch)
handle will bend
Material Safety Data Sheet
In a pressure gauge


34. The color code for ACR copper is...
BUT
Crimson... think aCRimson
Mechanical/Thermostatic
Solder joints


35. A concentric reducer could be used to connect to a horizontal pump _______________ line.
discharge
Expansion loop.
Remove the packing
Pneumatics


36. A sling is weakest in which position?
Bumping
Choked position
Blue... think b-LLLLue
Pipe penetration


37. Which is the correct formula for the area of a circle?
.7854 x D squared
Sch 40
no valves permitted
62.4lbs


38. OD for 6'(inch)

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39. When a soldered joint is overheated...
Flat position only
Flat and horizontal positions
Purge the line when brazing
The flux burns and the joint becomes ineffective


40. One gallon of water weighs?
.7854 x D squared
.0361
8.33 pounds
Tagged and removed from service.


41. OD for 1'(inch)

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42. What should be done first when preparing a copper joint?
25 feet
Clean all surfaces
Conduction - convection and radiant.
Large end to smaller end to center(bull)


43. The proper way to extinguish a fire is to...
3 1/2'(inch)
BUT
bowline on a bight
Point at the base and sweep the base with the extinguisher


44. The control point adjustment on a receiver is used to change the _______________.
The impeller
The same ID as the branch
Flashing
set point


45. In a refrigeration system a condensable gas is...
7.0
Ammonia
Sch 40
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)


46. 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...
Cavitation
BUT
Absolute
Capillary action


47. The density of 1 cubic inch of Mercury is...
2.31ft
.491lbs
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)
The impeller


48. Formula for a cubic foot of an unknown substances weight?
Multiply the length of the hypotenuse of the roll and the set by 1.414
The stud bolt is stronger than a machine bolt of the same size and material.
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
1.5


49. When a pipe size is decreased by half - the carrying capacity of the pipe decreases by...
Quarter
1.5
30 Degrees
The flux is in the filler material


50. What size hole should be cut into a main to saddle IN a smaller pipe?
take-off must be subtracted from the end-to-center measurement.
Pipe penetration
The same OD as the branch
Ammonia