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. With a high pressure valve you should never _____ under pressure.
The type of coating and current
hydrometer
Remove the packing
The science of heat transfer using water.

2. OD for 6'(inch)

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3. How often should the atmosphere be tested in a confined space?
.01745 - 3.1416 - and .7854
Ammonia
Eccentric reducer (flat on top)
Continuously

4. Standard atmospheric pressure at sea level is _____...
near the middle of the jaws
2.31ft
.491lbs
14.7 psia

5. What is typically a final control element?
Remote bulb
Valve
Magnesium
The temperature that the joints are made - the flux and temperatures of the system

6. OD for 1'(inch)

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7. Where is a bourdon tube found?
In a pressure gauge
Raise the load
After cutting
Flux

8. What causes water hammer?
With the weld at a 45 degree angle
8 5/8'(inch)
near the middle of the jaws
Insufficient condensate drainage

9. A simple example of a lever is...
The flux burns and the joint becomes ineffective
compression
A pry bar
Flat position only

10. Why can flux be omitted in a brazed joint?
The flux is in the filler material
2 and 1
compression
Green... think KKelly GREEN

11. What would be the result of an incorrectly installed orifice plate?
steel to copper joints
Erratic readings
falls
25 feet

12. If the travel of a 45 degree offset is known - what formula can be used to find the advance?
1 5/16'(inch)
Continuously
Expansion loop.
.707 x Travel

13. What causes water to move in a Hydronic system?
The pump creates a differential in pressure that moves the water.
sewage
Magnesium
6 5/8'(inch)

14. What is the sum of all angles in a triangle?
Green... think KKelly GREEN
To provide movement cause from a change in temperature
180
cool and lubricate the die

15. A __________ displacement pump discharges a definite quantity of liquid for each cycle.
231
Positive
2.31ft
dry expansion

16. What is the minimum thickness for threading PVC pipe?
Sch 40
The tubing has been cleaned for oxygen service
Remove the packing
Expansion loop.

17. What is the function of the covering on the electrodes during the process of '(inch)Shielded Metal Arc Welding'(inch)?
Provide oxygen barrier - stabilize and direct the force of the arc and to gather impurities in the form of slag.
.433psi
Groove
Loosen the far bolts first

18. What should be done first when preparing a copper joint?
Forced convection - because the FAN forces convection!
Protection for loss of water in the boiler.
Clean all surfaces
near the middle of the jaws

19. 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?
Tagged and removed from service.
Argon
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
Insure progressively tighter fit

20. What size hole should be cut into a main to saddle ON a smaller pipe?
The same ID as the branch
Cavitation
Globe
zinc

21. In a piping installation allowing for expansion in two directions - how should the anchor(s) and guide(s) be positioned relative to each other?
Center of the pipe
The tubing has been cleaned for oxygen service
Guide - Anchor - Guide
Steam

22. 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.
To allow for thermal movement
36'(inch)
cool and lubricate the die
foot valve

23. What instrument is best for measuring vacuum?
Its cheaper!
1 foot
10 feet
Manometer

24. What type of flame should be used to cut carbon steel?
Forced convection - because the FAN forces convection!
Raise the load
In the direction of flow
Neutral

25. A Hartford loop is used for...
Dog Everything
Protection for loss of water in the boiler.
The temperature that the joints are made - the flux and temperatures of the system
Center of the pipe

26. What does a condenser do?
Softens it
On high side of the system and turns gas to liquid.
To provide movement cause from a change in temperature
34 feet

27. The type of valve permitted downstream of a temperature and pressure relief valve on a water heater is...
Yellow.. think Dee Double U is yelloWWW
Bight - running end and standing part
Latent
no valves permitted

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

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29. When a soldered joint is overheated...
Loosen the far bolts first
zinc
Fuse
The flux burns and the joint becomes ineffective

30. When should a person designated as an attendant attempt to rescue a worker that is trapped?
Never
Set point
piping
hydrometer

31. A vent is not needed on a condensate receiver when...
Continuously
Mechanical return is used.
2.31ft
Softens it

32. What should the outside attendant do to rescue a worker who shows physiological effects of exposure in a confined space?
Notify response team and allow them to rescue.
Equalizing line
Fuse
On high side of the system and turns gas to liquid.

33. What are the main differences between soldering and brazing?
the type of coating and current
NEVER!
Eccentric reducers - flat on top
The temperature that the joints are made - the flux and temperatures of the system

34. A system which the refrigerant is in the shell and cools the fluid in the tubes is...
Flooded
near the middle of the jaws
Protection for loss of water in the boiler.
Clean all surfaces

35. The main cause of undercutting is...
Prevailing wind speed and direction - environmental concerns - zoning requirements
Too fast of a travel rate
1
Choked position

36. What type of valve should be used to bypass a control valve?
Pressuretrol
Crimson... think aCRimson
30 Degrees
Globe valve

37. What temperature does water boil at sea level?
Vaporization
Purge the line when brazing
212 degrees F
Ammonia

38. What type of Copper tubing is not identified by color on the tubing itself?
Absolute
soft tempered
Choked position
Quarter

39. A mixing valve has ___ inlets and ___ outlets.
Dog Everything
Schedule 10
In the direction of flow
2 and 1

40. The sum of atmospheric and gauge pressure is known as __________ pressure.
Height * .433 = psig
hydrometer
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
Absolute

41. There are __________ cubic inches in a gallon.
Ammonia
231
840
The temperature that the joints are made - the flux and temperatures of the system

42. The color code for type K copper is...
Green... think KKelly GREEN
1/2 BTU
The same ID as the branch
Set point

43. A guard rail system must withstand a minimum force of __________ pounds.
Not to scale - does not show locations of equipment. It shows pipe size and flow.
Fusion
200 lbs
Spiral

44. What is the weakest part of a chain hoist?
.7854 x D squared
maximum rated capacity
lower hook
Groove

45. Oil is used on a pipe machine to...
cool and lubricate the die
1.5
Flat and horizontal positions
Expansion loop.

46. The final step in the galvanizing of pipe is to dip the pipe into a bath of molten _________?
3 1/2'(inch)
true isometric
zinc
Snubber

47. OD for 3'(inch)

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48. What does the term '(inch)never saddle a dead horse'(inch) mean?
return fitting
The science of heat transfer using water.
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)
Arrange a wire rope clamp so that the dead end has the U bolts

49. What size hole should be cut into a main to saddle IN a smaller pipe?
On low side of the system and expands liquid to low pressure gas.
Before the strainer and fully open.
falls
The same OD as the branch

50. What is installed after the isolation valve and before the trap union on a standard trap assembly?
Softener
Strainer
Increase
Neutral