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. How often should the atmosphere be tested in a confined space?
Pneumatics
A pry bar
Continuously
75 degrees - also 4 to 1

2. To order a reducing tee you should specify the size by...
Globe
1 foot
Large end to smaller end to center(bull)
Green

3. The color code for DWV copper is...
The type of coating and current
Yellow.. think Dee Double U is yelloWWW
On high side of the system and turns gas to liquid.
Sch 80 Steel pipe

4. What is installed after the isolation valve and before the trap union on a standard trap assembly?
Strainer
Yellow.. think Dee Double U is yelloWWW
Not to scale - does not show locations of equipment. It shows pipe size and flow.
Positive

5. In a typical residential air conditioning system - the evaporator is of the _______________ type - where the liquid refrigerant should be totally vaporized before it reaches the outlet of the evaporator.
Ball joint - Bellows Joint and Packed Joint
Air Bound
Pressuretrol
Dry expansion type

6. The color code for type '(inch)K'(inch) copper is?
3.1416
Green
Eccentric reducers - flat on top
bowline on a bight

7. What are 3 fuel gases used for heating pipe or tubing?
NEVER!
steam and condensate flowing in the same direction
MAPP - acetylene - and propane
100% of the rated capacity

8. The letters MSDS stand for...
Material Safety Data Sheet
Increase
Flooded
Notify response team and allow them to rescue.

9. What is the minimum safe clearance between cranes and energized power lines operating at 50kV or below?
To reduce the pressure from the cylinders to safe and workable pressures
Flooded
10 feet
Mechanical return is used.

10. The pressure exerted by a liquid at rest is...
Hydrostatic
Strainer
near the middle of the jaws
Anchors

11. The main cause of undercutting is...
Waterlogged
compression
Too fast of a travel rate
Purge the line when brazing

12. If the architectural scale is 1/4'(inch) equals 1 foot - the ratio would be...
near the middle of the jaws
Before the strainer and fully open.
1:48 - because 1/4 of an inch is 1/48th of a foot
Large end to smaller end to center(bull)

13. What is the standard pressure range for a pneumatic signal?
cool and lubricate the die
The tubing has been cleaned for oxygen service
3 to 15 psi
Eccentric reducer (flat on top)

14. What type of valve should be used to bypass a control valve?
Clean all surfaces
Latent
Globe valve
Flashing

15. What is used to soften PVC and remove the gloss?
None
foot valve
Primer
Fuel - Heat - Oxygen

16. An increase in pressure will cause the boiling point of water to ________...
set point
Level the 90 in horizontal position determine inside arc - backside arc and face to center dimensions for 60 degree elbow - mark and cut
Increase
.625

17. In a piping installation allowing for expansion in two directions - how should the anchor(s) and guide(s) be positioned relative to each other?
.7854 x D squared
Beam clamp
Guide - Anchor - Guide
lower hook

18. Calculate head pressure of a vertical pipe at specific elevations.
Guide - Anchor - Guide
(Total Height - Elevation) * .433 = psig
Tagged and removed from service.
Spring hanger

19. Before attaching regulators to an oxygen cylinder...
blow the valves for a moment
Remove any paint or rust.
Large end to smaller end to center(bull)
Forced convection - because the FAN forces convection!

20. In the cooling cycle - which component throttles the flow of refrigerant?
Softens it
return fitting
Discharge
Expansion Device

21. Name the three methods of transferring heat.
250 degrees
West of the building
Green
Conduction - convection and radiant.

22. The change in state from a liquid to gas is known as...
Vaporization
.707 x Travel
Ball joint - Bellows Joint and Packed Joint
Neutral

23. The amount of heat necessary bring about a change of state from solid to liquid or liquid to gas is known as _______________ heat.
no valves permitted
Latent
Insure progressively tighter fit
hydrometer

24. When changing pipe sizes in the horizontal supply or return lines of a two-pipe hot water heating system use...
Latent
.707
Pressuretrol
Eccentric reducers - flat on top

25. A concentric reducer could be used to connect to a horizontal pump _______________ line.
Water
Center of the pipe
In the hot water heating pumps discharge piping.
Discharge

26. What is the purpose of the oxygen and acetylene regulators?
the core
To reduce the pressure from the cylinders to safe and workable pressures
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
Not to scale - does not show locations of equipment. It shows pipe size and flow.

27. The most that a crane should be loaded is...
The tensile strength of the rod in PSI times 1 -000
Tagged and removed from service.
Arrange a wire rope clamp so that the dead end has the U bolts
100% of the rated capacity

28. A rating of 150# refers to a flange's...
Latent
Segmental
Pressure rating
2 3/8'(inch)

29. The only entity that has the responsibility and authority to appoint the competent person is...
Strainer
2.31ft
the employer
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

30. When a pipe size is decreased by half - the carrying capacity of the pipe decreases by...
Air
Quarter
handle will bend
Bumping

31. Momentarily closing the starting switch to check the rotation of the pump is known as __________ the pump.
Bumping
.491lbs
.707
25 feet

32. What causes water to move in a Hydronic system?
The pump creates a differential in pressure that moves the water.
Conduction - convection and radiant.
Argon
1.25'(inch)

33. The pipe that connects the steam header to the boiler return connection is the...
The flow of a liquid into a small space
Fusion
handle will bend
Equalizing line

34. The final step in the galvanizing of pipe is to dip the pipe into a bath of molten _________?
maximum rated capacity
.625
zinc
14.7psia - always in PSI-A

35. The specific gravity of a liquid can only be measured using the following instrument...
4 times
Clove hitch with a half hitch
Center of the pipe
hydrometer

36. A valve on the suction side of the pump should be...
OD
8.33 pounds
Hydraulics
Before the strainer and fully open.

37. The weight of 1 cubic foot of water is...
Spring hanger
62.4lbs
Pressuretrol
Notify response team and allow them to rescue.

38. A thermostatic steam trap that fails in the closed position would cause a heating unit to become...
The flow of a liquid into a small space
Large end to smaller end to center(bull)
Waterlogged
200 lbs

39. Which of the following is the decimal equivalent of 5/8'(inch)
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.
1.5
3.1416
.625

40. OD for 1/2'(inch)

41. If you double pipe size the carrying capacity is increased...
4 times
4 to 20 milliamps
15 PSI
.01745 - 3.1416 - and .7854

42. When using a cable come-a-long - what safety device will indicate overloading?
handle will bend
take-off must be subtracted from the end-to-center measurement.
.491lbs
set point

43. What is the sum of all angles in a triangle?
Mechanical/Thermostatic
Softener
.433psi
180

44. Oil is used on a pipe machine to...
.075lbs
cool and lubricate the die
piping
The pump creates a differential in pressure that moves the water.

45. What is the formula to calculate thermal expansion?

46. Where should the high pressure condensate be piped to before entering the receiver?
The pump creates a differential in pressure that moves the water.
falls
Flash Tank
The flux is in the filler material

47. Which component in a closed control loop is the primary element?
maximum rated capacity
Sensor
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)
Dog Everything

48. What are the three types of steam traps?
bowline on a bight
Magnesium
Thermostatic - Thermodynamic and Mechanical
1728

49. To fabricate a 60 degree elbow from a 90 you would...
Level the 90 in horizontal position determine inside arc - backside arc and face to center dimensions for 60 degree elbow - mark and cut
15 PSI
Flat position only
Increase

50. Why is it necessary to use flux on a soldered joint?
To chemically prepare the pieces for soldering
Valve
Before the strainer and fully open.
Center of the pipe