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EPA Section 608 — Core

Safety: practice questions

Our EPA 608 Core bank has 10 questions on this topic. Here are 4 of them with answers; the full mock exam draws from every topic, like the real one.

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Question 1

Where should you place a refrigerant cylinder in a vehicle for transport?

  1. On the passenger seat unsecured
  2. Lying loose in the trunk
  3. Upright and secured
  4. In direct sunlight on the dashboard
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C. Upright and secured — Cylinders must be secured to prevent damage.

Question 2

What is the maximum temperature to which a refrigerant cylinder should be heated?

  1. Any temperature with a torch
  2. 300 °F
  3. 200 °F
  4. 125 °F (52 °C)
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D. 125 °F (52 °C) — Overheating can raise pressure dangerously; never use an open flame.

Question 3

Why must oxygen never be used to pressurize a refrigeration system?

  1. It contaminates the refrigerant and changes its colour permanently
  2. It freezes the oil
  3. It can explode when mixed with compressor oil
  4. It is too heavy
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C. It can explode when mixed with compressor oil — Use dry nitrogen instead.

Question 4

Which ASHRAE safety group describes refrigerants such as R-32 and R-1234yf?

  1. A2L (lower toxicity, lower flammability)
  2. A1
  3. B2
  4. A3
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A. A2L (lower toxicity, lower flammability) — Mildly flammable refrigerants need special handling and equipment.

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