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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. What type of expansion joint utilizes mechanical movement?
Forced convection - because the FAN forces convection!
Ball joint - Bellows Joint and Packed Joint
25' from any worker
Thermostatic - Thermodynamic and Mechanical

2. A neutral reading on the PH scale is...
4 to 20 milliamps
Climbing the cross braces.
Continuously
7.0

3. How much does 1 cubic foot of air weigh?
Climbing the cross braces.
A pry bar
The stud bolt is stronger than a machine bolt of the same size and material.
.075lbs

4. Which of the following methods of access to a scaffold is prohibited?
Backflow preventer
Climbing the cross braces.
Controller
Yellow.. think Dee Double U is yelloWWW

5. What would be the result of an incorrectly installed orifice plate?
Erratic readings
The temperature that the joints are made - the flux and temperatures of the system
Climbing the cross braces.
.433psi

6. Which type of orifice plate is designed to measure flow of liquids containing solids?
The type of coating and current
Segmental
4 times
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.

7. What type of sensor is directly in the process stream?
Insure progressively tighter fit
Raise the load
Immersion sensor
62.4 pounds

8. Use of air as a power source is known as...
1
To allow for thermal movement
1.25'(inch)
Pneumatics

9. A bushing is NOT a good replacement for a reducer because...
Bight - running end and standing part
4 times
62.4lbs
Its cheaper!

10. What is the purpose of the oxygen and acetylene regulators?
orthographic
212 degrees F
To reduce the pressure from the cylinders to safe and workable pressures
Argon

11. The maximum practical suction lift on positive displacement pumps is 22 feet and on centrifugal pumps it is __________ feet.
Erratic readings
4 1/2'(inch)
15 Feet
The stud bolt is stronger than a machine bolt of the same size and material.

12. When a liquid changes immediately to a vapor it is called...
25 feet
Flashing
Two Hole
.707

13. One gallon of water weighs?
8.33 pounds
Flooded
Body belts
Quarter

14. 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
14'(inch)
Flash Tank
14.7 psia

15. When a soldered joint is overheated...
Sensor
All the way to the shoulder
1
The flux burns and the joint becomes ineffective

16. An oil separator is required on systems using...
25' from any worker
Ammonia
Forced convection - because the FAN forces convection!
Anchors

17. A gallon of water weighs...
On low side of the system and expands liquid to low pressure gas.
maximum rated capacity
8.33lbs
Pipe penetration

18. When selecting a hanger for a piping system you should consider...
The system temperature - thermal and dynamic movement of the pipe and vibration.
25 feet
.707
Saturated

19. A device that mechanically attaches to the side of a flange on a beam is called a...
Beam clamp
4 times
Alloying
4 1/2'(inch)

20. Standard atmospheric pressure at sea level is _____...
14.7 psia
Softener
Forced convection - because the FAN forces convection!
steel to copper joints

21. What do the first two digits mean in E7018 electrodes?
The tensile strength of the rod in PSI times 1 -000
5 9/16'(inch)
Allow moisture to escape
Hydraulics

22. A simple example of a lever is...
On high side of the system and turns gas to liquid.
Backflow preventer
A pry bar
Down Stream

23. 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.
7.0
(Total Height - Elevation) * .433 = psig
840
Not to scale - does not show locations of equipment. It shows pipe size and flow.

24. In one cubic foot there are _________ cubic inches.
1728
15 PSI
Body belts
The type of coating and current

25. A tag line should be used on a crane lift...
ALWAYS
Saturated
Remove the packing
3.1416

26. When loosening the bolts on a flange one should...
Material Safety Data Sheet
Primer
Loosen the far bolts first
dry expansion

27. Formula for area of a circle?
true isometric
Depends on the desired action if the disc or plug becomes detatched from the stem. (Fail open or Fail closed)
falls
pi * radius squared

28. A cooling tower must have a ________ or be open-site.
3 to 15 psi
Backflow preventer
Never
the core

29. A float and thermostatic trap is a...
Mechanical/Thermostatic
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
1:48 - because 1/4 of an inch is 1/48th of a foot
foot valve

30. The final step in the galvanizing of pipe is to dip the pipe into a bath of molten _________?
Flash Tank
The tensile strength of the rod in PSI times 1 -000
zinc
Globe valve

31. Zinc chills or metal fume fever are caused from welding on __________ steel.
None
galvanized
Absolute
Steam

32. What should be done first when preparing a copper joint?
1728
The temperature that the joints are made - the flux and temperatures of the system
Clean all surfaces
8.33lbs

33. A schematic drawing is...
Continuously
When a large volume of condensate is generated
Basket
Not to scale - does not show locations of equipment. It shows pipe size and flow.

34. A rating of 150# refers to a flange's...
protect worker safety and health
Remote bulb
Insufficient condensate drainage
Pressure rating

35. OD for 1'(inch)

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36. What is the purpose of the expansion joint in a steam system?
The pump creates a differential in pressure that moves the water.
no valves permitted
To provide movement cause from a change in temperature
Thermostatic - Thermodynamic and Mechanical

37. A sling is weakest in which position?
Discharge
The tubing has been cleaned for oxygen service
Choked position
Green... think KKelly GREEN

38. Which way should the bevel face on an orifice plate?
Large volumes of condensate flash back to liquid in the tank so it removes trapped steam from the condensate.
Above the main
Down Stream
handle will bend

39. Where is a bourdon tube found?
Pipe strain
In a pressure gauge
NEVER!
true isometric

40. A direct acting thermostat is used to...
Increase the pressure when the temperature increases
Backflow preventer
Pressure rating
Saturated

41. What causes water to move in a Hydronic system?
BCuP - Stands for Brazed Copper Phosphorus
.491lbs
The pump creates a differential in pressure that moves the water.
10 feet

42. What is not a requirement to size the steam trap on a heating unit?
Large end to smaller end to center(bull)
Condensate pump size
Waterlogged
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)

43. In a refrigeration system a condensable gas is...
Steam
lower hook
Never
Ammonia

44. What is the maximum pressure for an acetylene hose?
15 PSI
Not to scale - does not show locations of equipment. It shows pipe size and flow.
Spring hanger
Expansion Device

45. If you double pipe size the carrying capacity is increased...
Hydrostatic
Expansion loop.
Arrange a wire rope clamp so that the dead end has the U bolts
4 times

46. When changing pipe sizes in the horizontal supply or return lines of a two-pipe hot water heating system use...
Increase
Allow moisture to escape
Eccentric reducers - flat on top
14'(inch)

47. OD for 6'(inch)

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48. Which of the following is NOT acceptable as part of a personal fall arrest system?
Ground Fault Circuit Interrupter
Fuse
Body belts
Protection for loss of water in the boiler.

49. Which of the following types of clamps are used to dampen a pipe's movement?
Spiral Wound
The tensile strength of the rod in PSI times 1 -000
Snubber
Discharge

50. An ejector pump is typically used to pump __________.
Controller
sewage
Basket
180

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Plumbing Certification

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