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. The last digit on a welding electrode refers to the __________ of the electrode.
231
Waterlogged
Coating
1 foot

2. .433 psig is equal to how high of a water column?
Dog Everything
Steam
1 foot
handle will bend

3. What are 3 fuel gases used for heating pipe or tubing?
None
Body belts
MAPP - acetylene - and propane
Increase the pressure when the temperature increases

4. To assemble a 4 bolt flange...
Valve
the employer
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
Globe valve

5. The specific gravity of a liquid can only be measured using the following instrument...
Softens it
Vaporization
hydrometer
Fuel - Heat - Oxygen

6. Exits from a trench 150' long and 4' deep must be located within how many feet of a worker in the trench?
Large end to smaller end to center(bull)
180
Insure progressively tighter fit
25 feet

7. The ______ is used to protect the weld puddle from contamination in the SMAW process.
On high side of the system and turns gas to liquid.
The Evaporator
protect worker safety and health
Flux

8. The color code for type K copper is...
Coating
The stud bolt is stronger than a machine bolt of the same size and material.
Choked position
Green... think KKelly GREEN

9. When a flux joint is overheated it will not...
Solder joints
Increase in friction
Fuse
Eccentric reducer (flat on top)

10. 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.
lower hook
Dry expansion type
25 feet
Yellow.. think Dee Double U is yelloWWW

11. One foot of water exerts...
.7854 x D squared
Flat position only
Remove the packing
.433psi

12. How much does 1 cubic foot of air weigh?
4 1/2'(inch)
.075lbs
Flux
Choked position

13. When a soldered joint is overheated...
Tagged and removed from service.
set point
The flux burns and the joint becomes ineffective
Prevailing wind speed and direction - environmental concerns - zoning requirements

14. Formula for area of a circle?
75 degrees - also 4 to 1
pi * radius squared
Coating
Flashing

15. Which of the following is a key element of a comprehensive safety and health program?
Flash Tank
Capillary action
Hazard prevention and control.
Remove the packing

16. What is the purpose for a weep hole in a saddle pad?
Mechanical/Thermostatic
The flux burns and the joint becomes ineffective
The same OD as the branch
Allow moisture to escape

17. When should you ream the end of a pipe?
After cutting
compression
Groove
Down Stream

18. What should be done to prepare a flange for the gasket installation?
Remove any paint or rust.
Segmental
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
cool and lubricate the die

19. What has the largest effect on pump alignment?
34 feet
Pipe strain
handle will bend
Pipe penetration

20. Steam condensate lines should use...
Discharge
.01745 - 3.1416 - and .7854
3 1/2'(inch)
Sch 80 Steel pipe

21. OD for 4'(inch)

22. What is the purpose of the oxygen and acetylene regulators?
Pressure rating
25' from any worker
To reduce the pressure from the cylinders to safe and workable pressures
8 5/8'(inch)

23. The specific weight of air and water is...
Guide - Anchor - Guide
1
Flash Tank
zinc

24. One gallon of water weighs?
OD
8.33 pounds
the employer
Material Safety Data Sheet

25. Why can flux be omitted in a brazed joint?
The flux is in the filler material
Loosen the far bolts first
Type K
Green... think KKelly GREEN

26. A neutral reading on the PH scale is...
7.0
Flooded
Capillary action
.625

27. Theoretically - a pump can raise water by suction approximately __________ feet vertically.
Schedule 10
Roller hangers
ALWAYS
34 feet

28. A schematic drawing is...
Neutral
Not to scale - does not show locations of equipment. It shows pipe size and flow.
Solder joints
62.4 pounds

29. If the architectural scale is 1/4'(inch) equals 1 foot - the ratio would be...
Bumping
Water
Pneumatics
1:48 - because 1/4 of an inch is 1/48th of a foot

30. A thermostatic steam trap that fails in the closed position would cause a heating unit to become...
Anchors
5ft - the 4 to 1 rule - every 4 feet high the base must move 1 foot back.
Waterlogged
Steam

31. The change in state from solid to liquid is known as...
the employer
The system temperature - thermal and dynamic movement of the pipe and vibration.
Saturated
Fusion

32. What is installed after the isolation valve and before the trap union on a standard trap assembly?
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
Steam
Too fast of a travel rate
Strainer

33. The combining of more than one metal is...
Alloying
2.31ft
the core
.707

34. The maximum practical suction lift on positive displacement pumps is 22 feet and on centrifugal pumps it is __________ feet.
Increase in friction
The flux is in the filler material
15 Feet
Pressure Rating

35. A dielectric fitting should be used on...
OD
steel to copper joints
1:48 - because 1/4 of an inch is 1/48th of a foot
Insufficient condensate drainage

36. The density of water is...
With the weld at a 45 degree angle
Clove hitch with a half hitch
Too fast of a travel rate
62.4

37. 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.
handle will bend
Absolute
piping
dry expansion

38. The symbol for pi is equivalent to...
When a large volume of condensate is generated
3.1416
Ammonia
Loosen the far bolts first

39. The anode rod used in a hot water heater to protect it from corrosion is made of...
Magnesium
To allow for thermal movement
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)
Softener

40. One pound of water pressure is equal to...
supporter of combustion
Increase
Flash Tank
2.31ft

41. Formula for a cubic foot of an unknown substances weight?
Forced convection - because the FAN forces convection!
On high side of the system and turns gas to liquid.
Latent
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

42. When changing pipe sizes in the horizontal supply or return lines of a two-pipe hot water heating system use...
Eccentric reducers - flat on top
Remove the packing
Fuse
Flat position only

43. The function of a steam trap is to prevent the flow of ________________ - while allowing condensate and non-condensable gases to pass through.
Steam
Expansion loop.
10 feet
Discharge

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

45. Momentarily closing the starting switch to check the rotation of the pump is known as __________ the pump.
radius squared times PI
Multiply the length of the hypotenuse of the roll and the set by 1.414
ALWAYS
Bumping

46. How often should the atmosphere be tested in a confined space?
1:48 - because 1/4 of an inch is 1/48th of a foot
25' from any worker
Continuously
Snubber

47. A triple-duty valve is installed...
steel to copper joints
return fitting
In the hot water heating pumps discharge piping.
Cavitation

48. What do the first two digits mean in E7018 electrodes?
Remove the packing
The tensile strength of the rod in PSI times 1 -000
the type of coating and current
falls

49. There are __________ cubic inches in a gallon.
Argon
Pneumatics
Eccentric reducer (flat on top)
231

50. Name the three methods of transferring heat.
Conduction - convection and radiant.
Blue... think b-LLLLue
Pressure rating
212 degrees F