HVAC Refrigeration Systems Exam

1. Question

Which of these would be a possible temperature for the vapor line coming out of an air-conditioner evaporator?

45°F

Correct Incorrect Correct answer

15°F

Correct Incorrect Correct answer

75°F

Correct Incorrect Correct answer

100°F

Correct Incorrect Correct answer

2. Question

Which of these would be a possible temperature for the liquid line coming out of an air-conditioner condenser?

100°F

Correct Incorrect Correct answer

15°F

Correct Incorrect Correct answer

250°F

Correct Incorrect Correct answer

50°F

Correct Incorrect Correct answer

3. Question

What is the purpose of a recovery cylinder?

To store used refrigerant.

Correct Incorrect Correct answer

To store new refrigerant.

Correct Incorrect Correct answer

To store dry nitrogen.

Correct Incorrect Correct answer

To store oil.

Correct Incorrect Correct answer

4. Question

What is the main advantage of using a digital manifold?

It calculates superheat, subcooling, and refrigerant temperatures.

Correct Incorrect Correct answer

It avoids the loss of refrigerant.

Correct Incorrect Correct answer

It is 10 times as accurate as analog manifold.

Correct Incorrect Correct answer

It is cheaper than analog manifold.

Correct Incorrect Correct answer

5. Question

Which of the following improvements must precede refrigerant evaluation?

Verifying adequate air-handler airflow.

Correct Incorrect Correct answer

Verifying the correct amperage of the compressor fan.

Correct Incorrect Correct answer

Verifying the correct thermostat setting.

Correct Incorrect Correct answer

Verifying adequate condenser airflow.

Correct Incorrect Correct answer

6. Question

What do you call the heat removed from liquid refrigerant by the liquid line below the condenser saturation temperature?

Subcooling

Correct Incorrect Correct answer

Superheat

Correct Incorrect Correct answer

Supercooling

Correct Incorrect Correct answer

Subheat

Correct Incorrect Correct answer

7. Question

Where would you measure the vapor temperature for a non-invasive refrigeration test?

Near the evaporator

Correct Incorrect Correct answer

Near the compressor

Correct Incorrect Correct answer

Near the condenser

Correct Incorrect Correct answer

At the vapor-line service valve

Correct Incorrect Correct answer

8. Question

In non-invasive testing, what approximate temperature value do you assume based on efficiency?

Saturation temperature.

Correct Incorrect Correct answer

Vapor temperature.

Correct Incorrect Correct answer

Outdoor temperature.

Correct Incorrect Correct answer

Indoor temperature.

Correct Incorrect Correct answer

9. Question

Where does the refrigerant reach saturation temperature?

In the center of the evaporator and condenser.

Correct Incorrect Correct answer

At the suction side of the compressor.

Correct Incorrect Correct answer

At the expansion or metering device.

Correct Incorrect Correct answer

At the return plenum of the air handler.

Correct Incorrect Correct answer

10. Question

What do you call the refrigerant piping and devices between the expansion device and the suction side of the compressor?

The low side.

Correct Incorrect Correct answer

The high side.

Correct Incorrect Correct answer

The condenser unit.

Correct Incorrect Correct answer

The air handler.

Correct Incorrect Correct answer

11. Question

What is happening in this photograph?

A technician is weighing the refrigerant into a residential HVAC system

Correct Incorrect Correct answer

A technician is testing a refrigeration system for refrigerant leaks

Correct Incorrect Correct answer

A technician is completely evacuating the refrigeration system into a recovery cylinder

Correct Incorrect Correct answer

The technician is weighing the existing refrigerant while removing it from the system

Correct Incorrect Correct answer

12. Question

What temperature measurement does the non-invasive method require in addition to measuring the refrigerant line temperature?

Air temperature entering the coil.

Correct Incorrect Correct answer

Saturation temperature.

Correct Incorrect Correct answer

Air temperature exiting the coil.

Correct Incorrect Correct answer

Subcooling temperature.

Correct Incorrect Correct answer

13. Question

What is this?

A vacuum pump

Correct Incorrect Correct answer

A compressor

Correct Incorrect Correct answer

A refrigerant reclamation machine

Correct Incorrect Correct answer

A fan motor

Correct Incorrect Correct answer

14. Question

What is this technician doing?

Cleaning the condenser coil

Correct Incorrect Correct answer

Cleaning the evaporator coil

Correct Incorrect Correct answer

Cleaning the compressor

Correct Incorrect Correct answer

Adding water to the sump of an evaporative cooler

Correct Incorrect Correct answer

15. Question

What is this technician doing?

Cleaning the evaporator coil

Correct Incorrect Correct answer

Cleaning the condenser coil

Correct Incorrect Correct answer

Cleaning the furnace heat exchanger

Correct Incorrect Correct answer

None of these describe this procedure

Correct Incorrect Correct answer

16. Question

Which of these would be the last procedure in commissioning a residential split system air conditioner or heat pump?

Correcting refrigerant change

Correct Incorrect Correct answer

Sealing duct leaks

Correct Incorrect Correct answer

Verifying airfflow

Correct Incorrect Correct answer

Cleaning the evaporator coil

Correct Incorrect Correct answer

17. Question

Where do we measure refrigerant-line temperatures for the non-invasive test?

Pipes carrying refrigerant that is leaving the coils.

Correct Incorrect Correct answer

Pipes carrying refrigerant entering the coils.

Correct Incorrect Correct answer

At the refrigerant pipes on either side of the compressor.

Correct Incorrect Correct answer

At the refrigerant pipes on either side of the expansion device.

Correct Incorrect Correct answer

18. Question

What is generally the most effective way to limit summer heat gain to reduce cooling load?

Shade the building.

Correct Incorrect Correct answer

Get the most efficient air conditioner.

Correct Incorrect Correct answer

Use fans.

Correct Incorrect Correct answer

Add insulation.

Correct Incorrect Correct answer

19. Question

What is happening in this photograph?

A technician is weighing the refrigerant into a residential HVAC system

Correct Incorrect Correct answer

A technician is testing a refrigeration system for refrigerant leaks

Correct Incorrect Correct answer

A technician is completely evacuating the refrigeration system into a recovery cylinder

Correct Incorrect Correct answer

The technician is weighing the existing refrigerant while removing it from the system

Correct Incorrect Correct answer

20. Question

What type of wall construction do you see here?

Wood-will frame, brick veneer

Correct Incorrect Correct answer

Structural brick wall

Correct Incorrect Correct answer

Platform frame with interior drywall

Correct Incorrect Correct answer

Brick wall with furring strips and plastic lath

Correct Incorrect Correct answer

21. Question

What type of chemical formulation are these two foam boards created from?

Polystyrene

Correct Incorrect Correct answer

Polyurethane

Correct Incorrect Correct answer

Urea formaldehyde

Correct Incorrect Correct answer

Polyethylene

Correct Incorrect Correct answer

22. Question

What is this?

A vacuum pump

Correct Incorrect Correct answer

A compressor

Correct Incorrect Correct answer

A refrigerant reclamation machine

Correct Incorrect Correct answer

A fan motor

Correct Incorrect Correct answer

23. Question

What type of wall construction do you see here?

Platform framing

Correct Incorrect Correct answer

Balloon framing

Correct Incorrect Correct answer

Optimized framing

Correct Incorrect Correct answer

Rotten framing

Correct Incorrect Correct answer

24. Question

What type of insulation is this?

Damp-spray cellulose

Correct Incorrect Correct answer

Cellulose batts

Correct Incorrect Correct answer

Damp spray polystyrene

Correct Incorrect Correct answer

Spray polyurethane foam

Correct Incorrect Correct answer

25. Question

What is this technician doing?

Cleaning the condenser coil

Correct Incorrect Correct answer

Cleaning the evaporator coil

Correct Incorrect Correct answer

Cleaning the compressor

Correct Incorrect Correct answer

Adding water to the sump of an evaporative cooler

Correct Incorrect Correct answer

26. Question

What type of wall construction do you see here?

Balloon framing

Correct Incorrect Correct answer

Platform framing

Correct Incorrect Correct answer

Minimized framing

Correct Incorrect Correct answer

Post and beam framing

Correct Incorrect Correct answer

27. Question

What type of insulation is this?

Damp-spray fiberglass

Correct Incorrect Correct answer

Damp-spray cellulose

Correct Incorrect Correct answer

Damp-spray polystyrene

Correct Incorrect Correct answer

Spray polyurethane foam

Correct Incorrect Correct answer

28. Question

What is this technician doing?

Cleaning the evaporator coil

Correct Incorrect Correct answer

Cleaning the condenser coil

Correct Incorrect Correct answer

Cleaning the furnace heat exchanger

Correct Incorrect Correct answer

None of these describe this procedure

Correct Incorrect Correct answer

29. Question

What type of wall construction do you see here?

Structural brick wall

Correct Incorrect Correct answer

Brick veneer wall

Correct Incorrect Correct answer

Brick overlay wall

Correct Incorrect Correct answer

Brick frame wall

Correct Incorrect Correct answer

30. Question

What type of insulation is this?

Spray polyurethane foam

Correct Incorrect Correct answer

Urea formaldehyde spray foam

Correct Incorrect Correct answer

Spray polystyrene foam

Correct Incorrect Correct answer

Spray polyethylene foam

Correct Incorrect Correct answer

31. Question

What type of wall construction do you see here?

Adobe brick structural wall

Correct Incorrect Correct answer

Adobe brick veneer wall

Correct Incorrect Correct answer

Mud brick overlay wall

Correct Incorrect Correct answer

Reinforced concrete frame wall

Correct Incorrect Correct answer

32. Question

What type of insulation is this?

Rock wool batts

Correct Incorrect Correct answer

Fiberglas batts

Correct Incorrect Correct answer

Cellulose batts

Correct Incorrect Correct answer

Polyurethane batts

Correct Incorrect Correct answer

33. Question

What is the modern functional name for this material as used in the latest building codes?

Water-resistive barrier

Correct Incorrect Correct answer

Weather-resilient barrier

Correct Incorrect Correct answer

Water-resilient barrier

Correct Incorrect Correct answer

House wrapping paper

Correct Incorrect Correct answer

34. Question

What type of foam board insulation is this?

Foil-faced polyisocyanurate foam board

Correct Incorrect Correct answer

Polystyrene foam board

Correct Incorrect Correct answer

Rock wool board

Correct Incorrect Correct answer

Foil-faced cellulose board

Correct Incorrect Correct answer

35. Question

Which of the following isn’t a common name for this material?

Lath and plaster

Correct Incorrect Correct answer

Gypsum board

Correct Incorrect Correct answer

Drywall

Correct Incorrect Correct answer

Sheet rock

Correct Incorrect Correct answer

36. Question

What is the most important disadvantage to this type of fiberglass batt insulation?

It doesn't fill the entire stud cavity

Correct Incorrect Correct answer

The facing isn't a vapor barrier

Correct Incorrect Correct answer

The insulation isn't thermally resistant

Correct Incorrect Correct answer

The facing isn't reflective

Correct Incorrect Correct answer

37. Question

What is the common name for this material?

Asphalt felt

Correct Incorrect Correct answer

Asphalt impregnated fiber board

Correct Incorrect Correct answer

Dark Tyvek

Correct Incorrect Correct answer

Water-restricted barrier

Correct Incorrect Correct answer

38. Question

What isn’t an advantage to this type of fiberglass batt insulation?

It is more airtight compared to batts with facings

Correct Incorrect Correct answer

It can fill the entire stud cavity

Correct Incorrect Correct answer

Is it is easier to cut and fit

Correct Incorrect Correct answer

It requires no fasteners

Correct Incorrect Correct answer

39. Question

What is this material?

Lap siding

Correct Incorrect Correct answer

Tongue and groove sheathing

Correct Incorrect Correct answer

Structural siding

Correct Incorrect Correct answer

Luker board cladding

Correct Incorrect Correct answer

40. Question

What is the likely cause of this shrinkage of EPS installed years ago on a south-facing wall?

Overheating

Correct Incorrect Correct answer

Moisture

Correct Incorrect Correct answer

Ultraviolet radiation

Correct Incorrect Correct answer

Poor installation

Correct Incorrect Correct answer

41. Question

What is this material?

Plywood

Correct Incorrect Correct answer

Particleboard

Correct Incorrect Correct answer

Oriented strand board

Correct Incorrect Correct answer

Wood fiber board

Correct Incorrect Correct answer

42. Question

What type of wall insulation is this?

Fiberglas wool blown through a vapor retarder

Correct Incorrect Correct answer

A cellulose batt lined with polyethylene

Correct Incorrect Correct answer

Polystyrene beads blown through a vapor barrier

Correct Incorrect Correct answer

None of these

Correct Incorrect Correct answer

43. Question

What is this material?

Oriented strand board

Correct Incorrect Correct answer

Particleboard

Correct Incorrect Correct answer

Plywood

Correct Incorrect Correct answer

Wood fiber board

Correct Incorrect Correct answer

44. Question

Which of these choices isn’t a common name for this type of building material?

Clay block

Correct Incorrect Correct answer

Concrete block

Correct Incorrect Correct answer

Cinderblock

Correct Incorrect Correct answer

Concrete masonry unit

Correct Incorrect Correct answer

45. Question

What is this building material?

Traditional tongue and groove would flooring

Correct Incorrect Correct answer

Would-plank rough wall sheathing

Correct Incorrect Correct answer

Linoleum flooring

Correct Incorrect Correct answer

Artificial roof decking

Correct Incorrect Correct answer

46. Question

What is this interior finish wall assembly?

Lath and plaster

Correct Incorrect Correct answer

Drywall backing

Correct Incorrect Correct answer

Tongue and groove

Correct Incorrect Correct answer

Traditional plasterboard

Correct Incorrect Correct answer

47. Question

What is this insulation material?

Cellulose

Correct Incorrect Correct answer

Fiberglas

Correct Incorrect Correct answer

Rock wool

Correct Incorrect Correct answer

Ground polystyrene

Correct Incorrect Correct answer

48. Question

What is this insulation material?

Fiberglas blowing wool

Correct Incorrect Correct answer

Cellulose blowing wool

Correct Incorrect Correct answer

Rock wool blowing wool

Correct Incorrect Correct answer

Silva wool

Correct Incorrect Correct answer

49. Question

What is this building material?

Traditional tongue and groove would flooring

Correct Incorrect Correct answer

Would-plank rough wall sheathing

Correct Incorrect Correct answer

Linoleum flooring

Correct Incorrect Correct answer

Artificial roof decking

Correct Incorrect Correct answer

50. Question

What is this interior finish wall assembly?

Lath and plaster

Correct Incorrect Correct answer

Drywall backing

Correct Incorrect Correct answer

Tongue and groove

Correct Incorrect Correct answer

Traditional plasterboard

Correct Incorrect Correct answer

51. Question

What is this insulation material?

Cellulose

Correct Incorrect Correct answer

Fiberglas

Correct Incorrect Correct answer

Rock wool

Correct Incorrect Correct answer

Ground polystyrene

Correct Incorrect Correct answer

52. Question

What is this insulation material?

Fiberglas blowing wool

Correct Incorrect Correct answer

Cellulose blowing wool

Correct Incorrect Correct answer

Rock wool blowing wool

Correct Incorrect Correct answer

Silva wool

Correct Incorrect Correct answer

53. Question

What type of wall construction do you see here?

Wood-will frame, brick veneer

Correct Incorrect Correct answer

Structural brick wall

Correct Incorrect Correct answer

Platform frame with interior drywall

Correct Incorrect Correct answer

Brick wall with furring strips and plastic lath

Correct Incorrect Correct answer

54. Question

What type of formulation are these two foam boards created from?

Polystyrene

Correct Incorrect Correct answer

Polyurethane

Correct Incorrect Correct answer

Urea formaldehyde

Correct Incorrect Correct answer

Polyethylene

Correct Incorrect Correct answer

55. Question

What type of wall construction do you see here?

Platform framing

Correct Incorrect Correct answer

Balloon framing

Correct Incorrect Correct answer

Optimized framing

Correct Incorrect Correct answer

Rotten framing

Correct Incorrect Correct answer

56. Question

What type of insulation is this?

Damp-spray cellulose

Correct Incorrect Correct answer

Cellulose batts

Correct Incorrect Correct answer

Damp spray polystyrene

Correct Incorrect Correct answer

Spray polyurethane foam

Correct Incorrect Correct answer

57. Question

What type of wall construction do you see here?

Balloon framing

Correct Incorrect Correct answer

Platform framing

Correct Incorrect Correct answer

Minimized framing

Correct Incorrect Correct answer

Post and beam framing

Correct Incorrect Correct answer

58. Question

What type of insulation is this?

Damp-spray fiberglass

Correct Incorrect Correct answer

Damp-spray cellulose

Correct Incorrect Correct answer

Damp-spray polystyrene

Correct Incorrect Correct answer

Spray polyurethane foam

Correct Incorrect Correct answer

59. Question

What type of wall construction do you see here?

Structural brick wall

Correct Incorrect Correct answer

Brick veneer wall

Correct Incorrect Correct answer

Brick overlay wall

Correct Incorrect Correct answer

Brick frame wall

Correct Incorrect Correct answer

60. Question

What type of insulation is this?

Spray polyurethane foam

Correct Incorrect Correct answer

Urea formaldehyde spray foam

Correct Incorrect Correct answer

Spray polystyrene foam

Correct Incorrect Correct answer

Spray polyethylene foam

Correct Incorrect Correct answer

61. Question

What type of wall construction do you see here?

Adobe brick structural wall

Correct Incorrect Correct answer

Adobe brick veneer wall

Correct Incorrect Correct answer

Mud brick overlay wall

Correct Incorrect Correct answer

Reinforced concrete frame wall

Correct Incorrect Correct answer

62. Question

What type of insulation is this?

Rock wool batts

Correct Incorrect Correct answer

Fiberglas batts

Correct Incorrect Correct answer

Cellulose batts

Correct Incorrect Correct answer

Polyurethane batts

Correct Incorrect Correct answer

63. Question

What is the modern functional name for this material?

Water-resistive barrier

Correct Incorrect Correct answer

Weather-resilient barrier

Correct Incorrect Correct answer

Water-resilient barrier

Correct Incorrect Correct answer

House wrapping paper

Correct Incorrect Correct answer

64. Question

What type of foam board insulation is this?

Foil-faced polyisocyanurate foam board

Correct Incorrect Correct answer

Polystyrene foam board

Correct Incorrect Correct answer

Rock wool board

Correct Incorrect Correct answer

Foil-faced cellulose board

Correct Incorrect Correct answer

65. Question

Which of the following isn’t a common name for this material?

Lath and plaster

Correct Incorrect Correct answer

Gypsum board

Correct Incorrect Correct answer

Drywall

Correct Incorrect Correct answer

Sheet rock

Correct Incorrect Correct answer

66. Question

What is the most important disadvantage to this type of fiberglass batt insulation?

It doesn't fill the entire stud cavity

Correct Incorrect Correct answer

The facing isn't a vapor barrier

Correct Incorrect Correct answer

The insulation isn't thermally resistant

Correct Incorrect Correct answer

The facing isn't reflective

Correct Incorrect Correct answer

67. Question

What is the common name for this material?

Asphalt felt

Correct Incorrect Correct answer

Asphalt impregnated fiber board

Correct Incorrect Correct answer

Dark Tyvek

Correct Incorrect Correct answer

Water-restricted barrier

Correct Incorrect Correct answer

68. Question

What is the most important disadvantage to this type of fiberglass batt insulation?

It doesn't fill the entire stud cavity

Correct Incorrect Correct answer

The facing isn't a vapor barrier

Correct Incorrect Correct answer

The insulation isn't thermally resistant

Correct Incorrect Correct answer

The facing isn't reflective

Correct Incorrect Correct answer

69. Question

What is this material?

Lap siding

Correct Incorrect Correct answer

Tongue and groove sheathing

Correct Incorrect Correct answer

Structural siding

Correct Incorrect Correct answer

Luker board cladding

Correct Incorrect Correct answer

70. Question

What isn’t an advantage to this type of fiberglass batt insulation?

It is more airtight compared to batts with facings

Correct Incorrect Correct answer

It can fill the entire stud cavity

Correct Incorrect Correct answer

Is it is easier to cut and fit

Correct Incorrect Correct answer

It requires no fasteners

Correct Incorrect Correct answer

71. Question

What is this material?

Plywood

Correct Incorrect Correct answer

Particleboard

Correct Incorrect Correct answer

Oriented strand board

Correct Incorrect Correct answer

Wood fiber board

Correct Incorrect Correct answer

72. Question

What is the likely cause of this shrinkage?

Overheating

Correct Incorrect Correct answer

Moisture

Correct Incorrect Correct answer

Ultraviolet radiation

Correct Incorrect Correct answer

Poor installation

Correct Incorrect Correct answer

73. Question

What is this material?

Oriented strand board

Correct Incorrect Correct answer

Particleboard

Correct Incorrect Correct answer

Plywood

Correct Incorrect Correct answer

Wood fiber board

Correct Incorrect Correct answer

74. Question

What do you call these panels?

Structural insulated panels

Correct Incorrect Correct answer

Exterior insulation and finish systems

Correct Incorrect Correct answer

Optima polyurethane panels

Correct Incorrect Correct answer

Lightweight foam panels

Correct Incorrect Correct answer

75. Question

Which of these choices isn’t a common name for this type of building material?

Clay block

Correct Incorrect Correct answer

Concrete block

Correct Incorrect Correct answer

Cinderblock

Correct Incorrect Correct answer

Concrete masonry unit

Correct Incorrect Correct answer

76. Question

What type of wall insulation is this?

Fiberglas wool blown through a vapor retarder

Correct Incorrect Correct answer

A cellulose batt lined with polyethylene

Correct Incorrect Correct answer

Polystyrene beads blown through a vapor barrier

Correct Incorrect Correct answer

None of these

Correct Incorrect Correct answer