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. Since _______________ is virtually incompressible - pressure has little effect on its volume.
Water
discharge
Pneumatics
dry expansion

2. What type of sensor is directly in the process stream?
1 foot
Immersion sensor
75 degrees - also 4 to 1
.707 x Travel

3. All of the following are process control elements EXCEPT...
14.7 psia
.433psi
Insufficient condensate drainage
piping

4. What type of copper is recommended for refrigeration?
Point thumb up
Type K
Set point
Two Hole

5. When changing pipe sizes in the horizontal supply or return lines of a two-pipe hot water heating system use...
take-off must be subtracted from the end-to-center measurement.
Remove any paint or rust.
Pipe strain
Eccentric reducers - flat on top

6. What is Hydronics?
When a large volume of condensate is generated
The science of heat transfer using water.
Purge the line when brazing
1728

7. Which component in a closed control loop is the primary element?
supporter of combustion
return fitting
75 degrees - also 4 to 1
Sensor

8. The specific gravity of a liquid can only be measured using the following instrument...
5 9/16'(inch)
hydrometer
Magnesium
25' from any worker

9. When loosening the bolts on a flange one should...
Loosen the far bolts first
None
The same OD as the branch
Absolute

10. 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.
Schedule 10
piping
Pipe penetration
dry expansion

11. What is the welding position 2 - on the electrode mean?
ALWAYS
Hydrostatic
Flat and horizontal positions
Manometer

12. Why is it necessary to use flux on a soldered joint?
Point at the base and sweep the base with the extinguisher
3 to 15 psi
Latent
To chemically prepare the pieces for soldering

13. Which rigging configuration has the greatest sling strength?
Sensor
take-off must be subtracted from the end-to-center measurement.
All position
Basket

14. The amount of heat necessary bring about a change of state from solid to liquid or liquid to gas is known as _______________ heat.
Provide oxygen barrier - stabilize and direct the force of the arc and to gather impurities in the form of slag.
To reduce the pressure from the cylinders to safe and workable pressures
Latent
Flat and horizontal positions

15. What is the purpose of the expansion joint in a steam system?
Remote bulb
protect worker safety and health
To provide movement cause from a change in temperature
discharge

16. The best method to ensure that a plastic joint is made properly - you should...
Eccentric reducers - flat on top
14'(inch)
Insert pipe into fitting and turn 1/4 turn and hold
Body belts

17. When a liquid changes immediately to a vapor it is called...
Flashing
compression
Large volumes of condensate flash back to liquid in the tank so it removes trapped steam from the condensate.
Clove hitch with a half hitch

18. What causes water hammer?
Insufficient condensate drainage
Continuously
Crimson... think aCRimson
Insure progressively tighter fit

19. Which of the following is NOT a reason to use stud bolts instead of machine bolts for bolting flanged piping joints?
None
piping
Latent
The stud bolt is stronger than a machine bolt of the same size and material.

20. The anode rod used in a hot water heater to protect it from corrosion is made of...
250 degrees
Pressuretrol
Magnesium
Absolute

21. Which one of the following alloys does not require flux when brazing copper to copper joints?
BCuP - Stands for Brazed Copper Phosphorus
Set up opposite bolts fairly tight - then tighten all bolts equally for inspection purposes.
15 PSI
Insufficient condensate drainage

22. What occurs in a flash tank?
Large volumes of condensate flash back to liquid in the tank so it removes trapped steam from the condensate.
On high side of the system and turns gas to liquid.
Pneumatics
Yellow.. think Dee Double U is yelloWWW

23. The last two digits on an E-6010 electrode specify...
Pneumatics
Flashing
Magnesium
the type of coating and current

24. What are the three types of steam traps?
set point
foot valve
Thermostatic - Thermodynamic and Mechanical
Segmental

25. What are the main differences between soldering and brazing?
BUT
Red.. think M&M is RED
The flux burns and the joint becomes ineffective
The temperature that the joints are made - the flux and temperatures of the system

26. In a piping installation allowing for expansion in two directions - how should the anchor(s) and guide(s) be positioned relative to each other?
West of the building
Two Hole
Schedule 10
Guide - Anchor - Guide

27. A cooling tower must have a ________ or be open-site.
Saturated
Backflow preventer
10 feet
Basket

28. To sense the temperature remotely from the thermostat location you would use...
Loosen the far bolts first
Remote bulb
None
Provide oxygen barrier - stabilize and direct the force of the arc and to gather impurities in the form of slag.

29. When a cranes signaler's hand is pointed up with his finger moving in a circle it means to...
Primer
Climbing the cross braces.
Protection for loss of water in the boiler.
Raise the load

30. When leaning a ladder against an object - the ladder should be at an approximate angle of __________ degrees.
75 degrees - also 4 to 1
Fuse
The tubing has been cleaned for oxygen service
14'(inch)

31. Calculate head pressure of a vertical pipe at specific elevations.
(Total Height - Elevation) * .433 = psig
Hydraulics
Provide oxygen barrier - stabilize and direct the force of the arc and to gather impurities in the form of slag.
25' from any worker

32. Which one of the following measures and takes action?
Equalizing line
Controller
The type of coating and current
lower hook

33. Horizontal steam supply piping should be reduced in size by using...
Eccentric reducer (flat on top)
DWV
Softens it
3 1/2'(inch)

34. Which is the correct formula for the area of a circle?
.7854 x D squared
Thermostatic - Thermodynamic and Mechanical
Red.. think M&M is RED
With the weld at a 45 degree angle

35. The device that controls the pressure in a low pressure steam boiler is called a...
Anchors
Steam
Notify response team and allow them to rescue.
Pressuretrol

36. OSHA was enacted to...
Sch 80 Steel pipe
.625
protect worker safety and health
falls

37. The face to center measurement of any welded angle fitting equals...
2.31ft
To reduce the pressure from the cylinders to safe and workable pressures
supporter of combustion
tangent 1/2 angle x radius

38. An oil separator is required on systems using...
Ammonia
Sch 40
Quarter
The Evaporator

39. To order a reducing tee you should specify the size by...
The flow of a liquid into a small space
Large end to smaller end to center(bull)
protect worker safety and health
Fusion

40. What is the main reason for the taper on a pipe thread?
DWV
Set point
West of the building
Insure progressively tighter fit

41. Guides are used near...
Set point
Anchors
Remove the packing
Climbing the cross braces.

42. Which type of orifice plate is designed to measure flow of liquids containing solids?
Two Hole
Segmental
Pneumatics
Positive

43. The color code for type L copper is...
Blue... think b-LLLLue
Flat and horizontal positions
Forced convection - because the FAN forces convection!
15 PSI

44. To figure the end-to-end measurement of a piece of pipe when the end-to-end center measurement is known the...
9
take-off must be subtracted from the end-to-center measurement.
Ball joint - Bellows Joint and Packed Joint
Globe valve

45. Zinc chills or metal fume fever are caused from welding on __________ steel.
14.7psia - always in PSI-A
hydrometer
Saturated
galvanized

46. The color code for type M copper is...
Insert pipe into fitting and turn 1/4 turn and hold
true isometric
Red.. think M&M is RED
Ground Fault Circuit Interrupter

47. What type of Copper tubing is not identified by color on the tubing itself?
soft tempered
Climbing the cross braces.
Body belts
On low side of the system and expands liquid to low pressure gas.

48. What type of hanger uses a spring that splits the rod?
The science of heat transfer using water.
The Evaporator
On low side of the system and expands liquid to low pressure gas.
Spring hanger

49. A neutral reading on the PH scale is...
7.0
In the direction of flow
4 1/2'(inch)
Crimson... think aCRimson

50. One atmosphere is equal to...
Increase the pressure when the temperature increases
Air Bound
14.7psia - always in PSI-A
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