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. When a liquid changes immediately to a vapor it is called...
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
The tensile strength of the rod in PSI times 1 -000
Flashing
840

2. Before attaching regulators to an oxygen cylinder...
Equalizing line
.075lbs
Green... think KKelly GREEN
blow the valves for a moment

3. What size hole should be cut into a main to saddle IN a smaller pipe?
Hazard prevention and control.
Expansion loop.
The same OD as the branch
Hydrostatic

4. With a high pressure valve you should never _____ under pressure.
3 to 15 psi
All position
Argon
Remove the packing

5. Which of the following is NOT a reason for using cutting oil when threading pipe?
A pry bar
To protect the threads from rust.
Ball joint - Bellows Joint and Packed Joint
cool and lubricate the die

6. Which of the following types of copper tube has the smallest wall thickness?
Dog Everything
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
DWV
Increase

7. Why is it necessary to use flux on a soldered joint?
6 5/8'(inch)
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
Ammonia
To chemically prepare the pieces for soldering

8. Guides are used near...
Coating
Mechanical/Thermostatic
Spiral Wound
Anchors

9. A neutral reading on the PH scale is...
7.0
Controller
Capillary action
Fuse

10. To view the west elevation the viewer's perspective is from the...
West of the building
30 Degrees
Increase the pressure when the temperature increases
Pressure Rating

11. Which one of the following measures and takes action?
Multiply the length of the hypotenuse of the roll and the set by 1.414
In the hot water heating pumps discharge piping.
Increase in friction
Controller

12. A device that mechanically attaches to the side of a flange on a beam is called a...
36'(inch)
.7854 x D squared
.135 cu ft
Beam clamp

13. The specific gravity of a liquid can only be measured using the following instrument...
Immersion sensor
hydrometer
4 1/2'(inch)
Air Bound

14. A cooling tower must have a ________ or be open-site.
Not to scale - does not show locations of equipment. It shows pipe size and flow.
Backflow preventer
Hydrostatics
To chemically prepare the pieces for soldering

15. Capillary action is used in...
Roller hangers
discharge
10 feet
Solder joints

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

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17. The specific weight of air and water is...
Quarter
7.0
Spiral Wound
1

18. 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?
Remove the packing
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
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
The flux burns and the joint becomes ineffective

19. What type of valve should be used to bypass a control valve?
Globe valve
Absolute
Quarter
OD

20. A rating of 150# refers to a flange's...
Pressure rating
Cavitation
25 feet
MAPP - acetylene - and propane

21. When brazing for medical gas or refrigeration always...
Purge the line when brazing
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)
The science of heat transfer using water.
231

22. The most that a crane should be loaded is...
8 5/8'(inch)
no valves permitted
Bumping
100% of the rated capacity

23. The control point adjustment on a receiver is used to change the _______________.
14'(inch)
set point
Center of the pipe
Steam

24. What is the maximum pressure for an acetylene hose?
15 PSI
Up and Down
Down Stream
200 lbs

25. The color code for type '(inch)K'(inch) copper is?
Green
tangent 1/2 angle x radius
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)
7.0

26. If you double pipe size the carrying capacity is increased...
soft tempered
4 times
Condensate pump size
Flooded

27. The amount of heat necessary bring about a change of state from solid to liquid or liquid to gas is known as _______________ heat.
Flooded
Latent
Increase the pressure when the temperature increases
Fuel - Heat - Oxygen

28. The color code for type M copper is...
Type K
6 5/8'(inch)
falls
Red.. think M&M is RED

29. What is the specific gravity of water?
Pipe strain
1
Before the strainer and fully open.
Basket

30. When using a cable come-a-long - what safety device will indicate overloading?
handle will bend
the core
Large end to smaller end to center(bull)
13/16'(inch)

31. What is Hydronics?
an eccentric reducer flat on top
To provide movement cause from a change in temperature
Globe
The science of heat transfer using water.

32. The specific weight of mercury is...
.0361
After cutting
supporter of combustion
Softener

33. When gripping a pipe with a pipe wrench - the wrench should be adjusted so the pipe is...
Pipe penetration
To reduce the pressure from the cylinders to safe and workable pressures
.7854 x D squared
near the middle of the jaws

34. 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
To provide movement cause from a change in temperature
Ammonia
Roller hangers

35. What type of expansion joint utilizes mechanical movement?
Height * .433 = psig
The tensile strength of the rod in PSI times 1 -000
Ball joint - Bellows Joint and Packed Joint
To reduce the pressure from the cylinders to safe and workable pressures

36. How many 2'(inch) pipes can be supplied from a 6'(inch) header?
To protect the threads from rust.
the core
bowline on a bight
9

37. The best knot to use when lifting pipe vertically is the...
Remove the packing
The tubing has been cleaned for oxygen service
NEVER!
Clove hitch with a half hitch

38. What type of flame should be used to cut carbon steel?
Magnesium
MAPP - acetylene - and propane
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
Neutral

39. The treatment of liquids at rest is known as...
The science of heat transfer using water.
1 5/16'(inch)
steel to copper joints
Hydrostatics

40. A concentric reducer could be used to connect to a horizontal pump _______________ line.
Remove any paint or rust.
Hydrostatics
piping
Discharge

41. An increase in pressure will cause the boiling point of water to ________...
30 Degrees
Climbing the cross braces.
The stud bolt is stronger than a machine bolt of the same size and material.
Increase

42. The symbol for pi is equivalent to...
MAPP - acetylene - and propane
3.1416
36'(inch)
Clove hitch with a half hitch

43. What are the main differences between soldering and brazing?
.075lbs
Level the 90 in horizontal position determine inside arc - backside arc and face to center dimensions for 60 degree elbow - mark and cut
Pressure rating
The temperature that the joints are made - the flux and temperatures of the system

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

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45. Which is the correct formula for the area of a circle?
Bumping
.7854 x D squared
2.31ft
Equalizing line

46. Which of the following constants are used when working with circles and areas?
Bumping
steel to copper joints
West of the building
.01745 - 3.1416 - and .7854

47. Steam condensate lines should be installed on...
no valves permitted
Roller hangers
Center of the pipe
Controller

48. When a pipe size is decreased by half - the carrying capacity of the pipe decreases by...
The Evaporator
8 5/8'(inch)
15 PSI
Quarter

49. What are the three types of steam traps?
.075lbs
231
Thermostatic - Thermodynamic and Mechanical
Clean all surfaces

50. What does GFCI stand for?
Ground Fault Circuit Interrupter
Solder joints
foot valve
ALWAYS