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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. What are the main differences between soldering and brazing?
Height * .433 = psig
In the hot water heating pumps discharge piping.
.075lbs
The temperature that the joints are made - the flux and temperatures of the system

2. A vertical line in an isometric drawing represents...
62.4lbs
Up and Down
Pneumatics
Flashing

3. Which of the following has the largest inside diameter?
Mechanical/Thermostatic
NEVER!
Above the main
Schedule 10

4. The specific weight of air and water is...
1
Alloying
200 lbs
Act as a safety device to shut off the motor if the operator's foot is removed from the switch.

5. A single line drawing of a piping system represents the...
Down Stream
Center of the pipe
Dry expansion type
3.1416

6. The pipe fitting that makes a 180 degree turn is called a/an?
dry expansion
return fitting
Air
All the way to the shoulder

7. The last two digits on an E-6010 electrode specify...
orthographic
the type of coating and current
Segmental
.707 x Travel

8. Horizontal steam supply piping should be reduced in size by using...
The flux burns and the joint becomes ineffective
Eccentric reducer (flat on top)
Spiral
Large end to smaller end to center(bull)

9. An oil separator is required on systems using...
In the hot water heating pumps discharge piping.
When a large volume of condensate is generated
Ammonia
Tagged and removed from service.

10. What are the three types of steam traps?
Thermostatic - Thermodynamic and Mechanical
Vaporization
212 degrees F
62.4 pounds

11. What does a condenser do?
Discharge
3 to 15 psi
On high side of the system and turns gas to liquid.
Body belts

12. 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.
dry expansion
tangent 1/2 angle x radius
Sch 40
200 lbs

13. OD for 2'(inch)

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14. How much heat is required to raise 1/2 pound of water 1 degree F?
1/2 BTU
36'(inch)
Softener
Flashing

15. When brazing for medical gas or refrigeration always...
Not to scale - does not show locations of equipment. It shows pipe size and flow.
3 1/2'(inch)
Purge the line when brazing
ALWAYS

16. The specific gravity of a liquid can only be measured using the following instrument...
In the direction of flow
hydrometer
1/2 BTU
34 feet

17. Why is it necessary to use roller hangers?
To allow for thermal movement
2 3/8'(inch)
5 9/16'(inch)
Fuse

18. An increase in pressure will cause the boiling point of water to ________...
The stud bolt is stronger than a machine bolt of the same size and material.
Increase
Provide oxygen barrier - stabilize and direct the force of the arc and to gather impurities in the form of slag.
Condensate pump size

19. Both soldered and brazed joints are made by heating a properly prepared joint to the proper temperature and the flowing of a filler metal by means of...
10 feet
62.4
no valves permitted
Capillary action

20. What is the formula to calculate thermal expansion?

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21. To determine the travel for a 45 degree rolling offset you would...
With the weld at a 45 degree angle
Positive
bowline on a bight
Multiply the length of the hypotenuse of the roll and the set by 1.414

22. What is the minimum thickness for threading PVC pipe?
soft tempered
Guide - Anchor - Guide
Sch 40
9

23. A guard rail system must withstand a minimum force of __________ pounds.
62.4 pounds
7.0
To provide movement cause from a change in temperature
200 lbs

24. A concentric reducer could be used to connect to a horizontal pump _______________ line.
discharge
Down Stream
Bumping
Point at the base and sweep the base with the extinguisher

25. One atmosphere is equal to...
Large volumes of condensate flash back to liquid in the tank so it removes trapped steam from the condensate.
OD
discharge
14.7psia - always in PSI-A

26. Why is it necessary to use flux on a soldered joint?
Air
9
To chemically prepare the pieces for soldering
Hydrostatic

27. What is the maximum pressure for an acetylene hose?
15 PSI
Groove
1.25'(inch)
Prevailing wind speed and direction - environmental concerns - zoning requirements

28. What causes pressure drop?
Type K
Increase in friction
180
Pressuretrol

29. What type of expansion joint does NOT utilize mechanical movement?
Hydraulics
Expansion loop.
Never
On low side of the system and expands liquid to low pressure gas.

30. When loosening the bolts on a flange one should...
Pipe strain
Fuse
4 to 20 milliamps
Loosen the far bolts first

31. The specific weight of mercury is...
.0361
no valves permitted
.01745 - 3.1416 - and .7854
None

32. The color code for DWV copper is...
Yellow.. think Dee Double U is yelloWWW
Forced convection - because the FAN forces convection!
13/16'(inch)
All position

33. A cooling tower must have a ________ or be open-site.
1
In a pressure gauge
set point
Backflow preventer

34. What is the welding position 2 - on the electrode mean?
Flat and horizontal positions
Roller hangers
Eccentric reducers - flat on top
Equalizing line

35. What do the first two digits mean in E7018 electrodes?
The tensile strength of the rod in PSI times 1 -000
Immersion sensor
The temperature that the joints are made - the flux and temperatures of the system
Notify response team and allow them to rescue.

36. A gallon of water weighs...
1 5/16'(inch)
galvanized
Fuse
8.33lbs

37. When selecting a hanger for a piping system you should consider...
The system temperature - thermal and dynamic movement of the pipe and vibration.
handle will bend
Primer
Point thumb up

38. .433 psig is equal to how high of a water column?
1 foot
To chemically prepare the pieces for soldering
The tensile strength of the rod in PSI times 1 -000
West of the building

39. What is the welding position 3 - on the electrode mean?
pi * radius squared
supporter of combustion
All the way to the shoulder
Flat position only

40. The device that controls the pressure in a low pressure steam boiler is called a...
With the weld at a 45 degree angle
Pressuretrol
Hydrostatics
To allow for thermal movement

41. What is the welding position 1 - on the electrode mean?
falls
galvanized
Solder joints
All position

42. OD for 6'(inch)

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43. A direct acting thermostat is used to...
Cavitation
Increase the pressure when the temperature increases
Spring hanger
Yellow.. think Dee Double U is yelloWWW

44. One gallon of water occupies how many cubic feet?
231
Neutral
Green
.135 cu ft

45. In a piping installation allowing for expansion in two directions - how should the anchor(s) and guide(s) be positioned relative to each other?
Roller hangers
Increase
Guide - Anchor - Guide
return fitting

46. Before attaching regulators to an oxygen cylinder...
Loosen the far bolts first
Basket
blow the valves for a moment
Remote bulb

47. A condensate receiver is used when...
The stud bolt is stronger than a machine bolt of the same size and material.
8.33 pounds
When a large volume of condensate is generated
Valve

48. The pipe that connects the steam header to the boiler return connection is the...
Level the 90 in horizontal position determine inside arc - backside arc and face to center dimensions for 60 degree elbow - mark and cut
.625
Equalizing line
Hydrostatics

49. A float and thermostatic trap is a...
1 foot
Mechanical/Thermostatic
.433psi
West of the building

50. To order a reducing tee you should specify the size by...
To provide movement cause from a change in temperature
Alloying
Groove
Large end to smaller end to center(bull)