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Plumbing Certification

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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. In a Hydronic heating system - units at the top of the system not heating are likely to be...
Axis of pipe should be on a 45 degree
Air Bound
.075lbs
Fusion

2. All of the following are process control elements EXCEPT...
Tagged and removed from service.
.433psi
piping
Prevailing wind speed and direction - environmental concerns - zoning requirements

3. Since _______________ is virtually incompressible - pressure has little effect on its volume.
Yellow.. think Dee Double U is yelloWWW
Basket
Water
Point thumb up

4. 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.
840
Globe valve
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.

5. Which one of the following measures and takes action?
Increase in friction
.7854 x D squared
Two Hole
Controller

6. One cubic foot of water weighs?
25' from any worker
62.4 pounds
Type K
1

7. A vertical line in an isometric drawing represents...
Large end to smaller end to center(bull)
Roller hangers
foot valve
Up and Down

8. What is the welding position 1 - on the electrode mean?
Mechanical return is used.
Basket
All position
Remove the packing

9. The main cause of undercutting is...
3 to 15 psi
OD
1
Too fast of a travel rate

10. Which rigging configuration has the greatest sling strength?
5 9/16'(inch)
Basket
tangent 1/2 angle x radius
Neutral

11. Horizontal steam supply piping should be reduced in size by using...
Fuse
Type K
Eccentric reducer (flat on top)
Ammonia

12. Which of the following is sometimes used as a shielding gas in the GTAW process?
Discharge
Argon
Pressuretrol
Too fast of a travel rate

13. OD for 3'(inch)

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14. Although the model codes usually say the melting point of a brazing alloy must be at least 1000º F - the technical temperature specified by the Copper Development Association and the American Welding Society is __________ degrees Fahrenheit.
The stud bolt is stronger than a machine bolt of the same size and material.
Remove any paint or rust.
840
1.5

15. What are the three types of steam traps?
Thermostatic - Thermodynamic and Mechanical
Body belts
231
Up and Down

16. .433 psig is equal to how high of a water column?
Magnesium
1 foot
Backflow preventer
The flux burns and the joint becomes ineffective

17. When brazing for medical gas or refrigeration always...
Spiral
Purge the line when brazing
212 degrees F
Air Bound

18. In a piping installation allowing for expansion in two directions - how should the anchor(s) and guide(s) be positioned relative to each other?
Material Safety Data Sheet
14.7psia - always in PSI-A
8 5/8'(inch)
Guide - Anchor - Guide

19. Which one of the following alloys does not require flux when brazing copper to copper joints?
Softener
BCuP - Stands for Brazed Copper Phosphorus
Clean all surfaces
(Total Height - Elevation) * .433 = psig

20. The type of drawing that most closely resembles an object as the eye would see it is referred to as a/an __________ drawing.
The system temperature - thermal and dynamic movement of the pipe and vibration.
Point at the base and sweep the base with the extinguisher
true isometric
Neutral

21. The treatment of liquids at rest is known as...
Hydrostatics
Level the 90 in horizontal position determine inside arc - backside arc and face to center dimensions for 60 degree elbow - mark and cut
2 and 1
The tensile strength of the rod in PSI times 1 -000

22. To order a reducing tee you should specify the size by...
Remove the packing
Point thumb up
Large end to smaller end to center(bull)
The temperature that the joints are made - the flux and temperatures of the system

23. Where should the pressure enter a globe valve?
steam and condensate flowing in the same direction
Thermostatic - Thermodynamic and Mechanical
62.4lbs
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)

24. With a high pressure valve you should never _____ under pressure.
Softens it
OD
Remove the packing
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

25. The best method to ensure that a plastic joint is made properly - you should...
Large volumes of condensate flash back to liquid in the tank so it removes trapped steam from the condensate.
Insert pipe into fitting and turn 1/4 turn and hold
Mechanical/Thermostatic
The flow of a liquid into a small space

26. How far should a copper tube be inserted into a cup for a brazed joint?
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.
Insufficient condensate drainage
All the way to the shoulder
15 Feet

27. Which component in a closed control loop is the primary element?
To chemically prepare the pieces for soldering
7.48
Equalizing line
Sensor

28. To determine the face to center measurement of a long radius 90 degree elbow - multiply the pipe size by...
the core
1.5
Hydrostatics
Segmental

29. A diamond on an instrumentation loop diagram encloses information concerning...
15 Feet
Set point
DWV
62.4

30. Steam in contact with the water it has been generated from is known as ________________ steam.
compression
Forced convection - because the FAN forces convection!
NEVER!
Saturated

31. What are 3 fuel gases used for heating pipe or tubing?
Cavitation
MAPP - acetylene - and propane
Increase
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)

32. Why is it necessary to use roller hangers?
To allow for thermal movement
Cavitation
Primer
With the weld at a 45 degree angle

33. To figure the end-to-end measurement of a piece of pipe when the end-to-end center measurement is known the...
Neutral
take-off must be subtracted from the end-to-center measurement.
Ball joint - Bellows Joint and Packed Joint
4 times

34. What is the main reason for the taper on a pipe thread?
Insure progressively tighter fit
Level the 90 in horizontal position determine inside arc - backside arc and face to center dimensions for 60 degree elbow - mark and cut
9
Quarter

35. When should a person designated as an attendant attempt to rescue a worker that is trapped?
galvanized
1 5/16'(inch)
Never
2.31ft

36. What is the minimum thickness for threading PVC pipe?
Sch 40
To chemically prepare the pieces for soldering
BCuP - Stands for Brazed Copper Phosphorus
Provide oxygen barrier - stabilize and direct the force of the arc and to gather impurities in the form of slag.

37. What type of valve should be used to bypass a control valve?
Globe valve
Increase in friction
Never
Pipe penetration

38. Which of the following has the largest inside diameter?
Conduction - convection and radiant.
Flux
Schedule 10
Notify response team and allow them to rescue.

39. What does the term '(inch)never saddle a dead horse'(inch) mean?
Arrange a wire rope clamp so that the dead end has the U bolts
Insufficient condensate drainage
5 9/16'(inch)
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)

40. In a typical residential air condittioning system - the evaporator is of the _______________ type - where the liquid refrigerant should be totally vaporized before it reaches the outlet of the evaporator.
Flux
dry expansion
West of the building
All the way to the shoulder

41. Which of the following is NOT a reason for using cutting oil when threading pipe?
1
25' from any worker
Hazard prevention and control.
To protect the threads from rust.

42. The last two digits on an E-6010 electrode specify...
the type of coating and current
8.33lbs
Groove
Before the strainer and fully open.

43. An oil separator is required on systems using...
On high side of the system and turns gas to liquid.
Axis of pipe should be on a 45 degree
Ammonia
bowline on a bight

44. What is the standard pressure range for a pneumatic signal?
To provide movement cause from a change in temperature
3 to 15 psi
hydrometer
the type of coating and current

45. When using a cable come-a-long - what safety device will indicate overloading?
3 to 15 psi
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)
Remove any paint or rust.
handle will bend

46. What is the maximum pressure for an acetylene hose?
15 PSI
1 foot
The flow of a liquid into a small space
Coating

47. A __________ displacement pump discharges a definite quantity of liquid for each cycle.
Clove hitch with a half hitch
true isometric
Positive
All the way to the shoulder

48. When a loop is needed at any point between ends of a rope - the proper knot to tie is the...
With the weld at a 45 degree angle
bowline on a bight
Notify response team and allow them to rescue.
Valve

49. What is typically a final control element?
Valve
Guide - Anchor - Guide
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)
1728

50. When a liquid changes immediately to a vapor it is called...
Flashing
Mechanical return is used.
Too fast of a travel rate
hydrometer

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Plumbing Certification

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