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Free Practice Quiz Question List

1 Appliance Types, Pressure Hazards, and Safety Online Quiz Questions

Use this free practice quiz with 20 questions to review 1 Appliance Types, Pressure Hazards, and Safety, test your knowledge, and prepare for your next test or exam.

20 questions
01
Choose one
1 point

Which property and reference condition are used for EPA pressure classifications?

  1. A

    The refrigerant’s pressure during the latest service check

  2. B

    The refrigerant’s liquid-phase saturation pressure at 104°F

  3. C

    The system’s operating gauge pressure at startup

  4. D

    The compressor’s maximum rated pressure

02
True or false
1 point

A refrigerant circuit can retain pressure in an isolated section even when the system is off.

  1. A

    True

  2. B

    False

03
Fill in the blank
1 point

Under EPA classifications, a refrigerant with a critical temperature below 104°F is even if it does not meet the saturation-pressure test.

04
Written response
1 point

At 104°F, what is the lower pressure boundary, in psia, of the EPA high-pressure range?

05
Choose one
1 point

Why should a refrigerant’s pressure classification in psia not be compared directly with a service reading in psig?

  1. A

    Psia and psig are interchangeable labels for the same reading.

  2. B

    Psig is measured from a perfect vacuum, while psia is measured from atmospheric pressure.

  3. C

    Psia is absolute pressure, while psig is measured relative to atmospheric pressure.

  4. D

    Psia is used only for low-pressure refrigerants, while psig is used only for high-pressure refrigerants.

06
Choose all
1 point

Which hazards can result from a refrigerant release? Select all that apply.

  1. A

    A fast-moving jet can propel debris or cause a hose to whip.

  2. B

    Liquid refrigerant can cause cold burns or eye injury.

  3. C

    A refrigerant release always ignites when it contacts air.

  4. D

    A release can create an oxygen-displacement or asphyxiation hazard.

07
True or false
1 point

Heating a pressurized refrigerant vessel can increase its pressure.

  1. A

    True

  2. B

    False

08
Fill in the blank
1 point

For routine work where liquid contact is possible, wear gloves suitable for .

09
Choose one
1 point

A leak creates an unknown or potentially dangerous atmosphere. What is the appropriate immediate response?

  1. A

    Stay in the area and use an air-purifying respirator while locating the leak.

  2. B

    Leave the area, warn others, and follow the site emergency plan.

  3. C

    Open nearby equipment to release any remaining pressure.

  4. D

    Wait for the compressor to restart before deciding whether to evacuate.

10
Choose all
1 point

Which practices are appropriate when preparing to open a refrigerant circuit? Select all that apply.

  1. A

    Use the approved isolation, recovery, and pressure-verification procedures for the equipment.

  2. B

    Use appropriately rated tools, hoses, fittings, and recovery equipment.

  3. C

    Treat a stopped compressor as proof that every circuit section is depressurized.

  4. D

    Keep cylinders secured and away from heat.

11
Choose one
1 point

Which EPA appliance pressure class includes R-410A?

  1. A

    Low-pressure

  2. B

    Very-high-pressure

  3. C

    High-pressure

  4. D

    It cannot be classified without a service gauge reading.

12
Open ended
1 point

Describe at least three distinct hazards associated with refrigerant work and connect each hazard to a relevant precaution or response.

13
Choose one
1 point

You cannot confidently identify the refrigerant in an appliance before servicing it. What should you do to establish the correct classification?

  1. A

    Infer the refrigerant from the equipment’s appearance and proceed.

  2. B

    Verify the refrigerant and consult the equipment documentation.

  3. C

    Use the compressor’s sound to identify the pressure class.

  4. D

    Classify the appliance using whichever service pressure reading is available.

14
True or false
1 point

True or false: A face shield can replace safety glasses or goggles when splash or jet exposure is possible.

  1. A

    True

  2. B

    False

15
Written response
1 point

What is the lower pressure boundary of the EPA high-pressure classification at 104°F? Enter the value in psia.

16
Written response
1 point

At dangerous concentrations, what serious hazard can carbon dioxide cause?

17
Choose one
1 point

A technician sees a changing gauge reading while servicing an appliance. Which pressure basis should be used to determine its EPA pressure class?

  1. A

    The pressure shown by a service gauge during operation, in psig

  2. B

    The refrigerant’s liquid-phase saturation pressure at 104°F, in psia

  3. C

    The circuit pressure after the compressor stops, in psia

  4. D

    The refrigerant’s vapor pressure at room temperature, in psig

18
Choose one
1 point

During a task with possible liquid refrigerant contact and splash exposure, which PPE choice best follows the stated precautions?

  1. A

    A face shield alone, with no other eye protection or gloves

  2. B

    Ordinary work gloves and safety footwear only

  3. C

    Safety glasses or goggles, a face shield if splash or jet exposure is possible, and gloves suitable for cold refrigerant contact

  4. D

    A respirator alone, regardless of the task or hazard assessment

19
Choose one
1 point

A pressurized refrigerant vessel is near a hot-work area. Which assessment best reflects the hazards that should be considered?

  1. A

    Heating can increase vessel pressure, and flame or hot work may produce hazardous decomposition products.

  2. B

    Heating reduces pressure, and flame prevents refrigerant decomposition.

  3. C

    Only the compressor can raise pressure, so heating a vessel presents no additional concern.

  4. D

    Heat is a concern only when the system is operating.

20
Written response
1 point

A facility uses specialized cryogenic refrigeration. Which refrigerant pressure class is associated with this type of application?