EPA 608 Plan

Type II — medium, high and very high-pressure appliances: practice questions

5 original questions · 5 editor-approved · every choice explained.

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Blueprint-mapped questions with full rationales for every choice.

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Type II — medium, high and very high-pressure appliancesDifficulty 4/5

A high-pressure appliance holds a full charge of 260 pounds and the recovery machine was made in 2018. What evacuation level does Table 1 require?

  1. AFifteen inches of mercury vacuum, because the recovery machine postdates the rule
  2. BZero inches of mercury vacuum, because high-pressure appliances have no requirement
  3. CTen inches of mercury vacuum, because the charge is two hundred pounds or more
  4. DFour inches of mercury vacuum, because the appliance operates at high pressure
Show answer and rationale

Correct: C. Table 1 splits high-pressure appliances at two hundred pounds. Under that figure the requirement is zero; at or above it the requirement is four inches for pre-1993 equipment and ten inches for later equipment.

  • D — Four inches is the pre-15 November 1993 equipment figure; this machine was built in 2018.
  • A — Fifteen inches applies to medium-pressure appliances of two hundred pounds or more.
  • B — Zero applies only to high-pressure appliances with a charge under two hundred pounds.
Type II — medium, high and very high-pressure appliancesDifficulty 3/5

Under 40 CFR 82.157, what annual leak rate triggers the repair requirement for commercial refrigeration equipment?

  1. AThirty percent, for appliances with a full charge of fifty pounds or more
  2. BTen percent, for appliances with a full charge of fifty pounds or more
  3. CFifteen percent, for appliances with a full charge of twenty pounds or more
  4. DTwenty percent, for appliances with a full charge of fifty pounds or more
Show answer and rationale

Correct: D. Section 82.157(c)(2) sets three thresholds: twenty percent for commercial refrigeration, thirty percent for industrial process refrigeration, and ten percent for comfort cooling and everything else. All are gated on a fifty-pound full charge.

  • A — Thirty percent is the industrial process refrigeration threshold, not the commercial one.
  • B — Ten percent covers comfort cooling and other appliances not in the first two categories.
  • C — Fifteen percent is not a threshold in the rule, and the charge gate is fifty pounds.
Type II — medium, high and very high-pressure appliancesDifficulty 3/5

After reaching the required recovery vacuum, the system pressure rises again over the next few minutes. What does this indicate?

  1. ALiquid refrigerant remains in the system or is dissolved in the compressor oil
  2. BThe recovery machine has failed and its internal valves are leaking backwards
  3. CThe required level was exceeded and refrigerant is being drawn back into the system
  4. DNon-condensable gases have entered and must be purged before work can continue
Show answer and rationale

Correct: A. Refrigerant dissolved in oil boils off slowly, raising the pressure after the gauge first reaches target. This is why the topic list tells you to wait and watch rather than disconnect immediately.

  • B — A machine fault would show as a failure to reach the level, not as a slow rise after it.
  • C — Recovery machines do not push refrigerant back into an appliance once the level is reached.
  • D — Non-condensables are a low-pressure system concern and would not appear at this point.
Type II — medium, high and very high-pressure appliancesDifficulty 3/5

System-dependent recovery equipment may not be used on an appliance containing more than how much refrigerant?

  1. ATwo hundred pounds, above which the evacuation requirement in Table 1 increases
  2. BFifteen pounds, above which self-contained recovery equipment must be used instead
  3. CFive pounds, above which the appliance ceases to be classed as a small appliance
  4. DFifty pounds, above which the appliance becomes subject to the leak repair rules
Show answer and rationale

Correct: B. Fifteen pounds is the cut-off for passive, system-dependent recovery. It is easy to confuse with the other thresholds in the rule, which is exactly why the exam includes all of them as options.

  • C — Five pounds is the small-appliance definition threshold, not the recovery equipment limit.
  • D — Fifty pounds is the charge at which the 82.157 leak repair requirements begin to apply.
  • A — Two hundred pounds is a Table 1 breakpoint for evacuation levels, not an equipment limit.
Type II — medium, high and very high-pressure appliancesDifficulty 4/5

A non-major repair will be made to a high-pressure appliance, and it will not be evacuated to the atmosphere afterwards. What must be reached before opening it?

  1. AThe full Table 1 vacuum level, because the appliance operates at high pressure
  2. BA pressure no higher than twenty-five millimetres of mercury absolute pressure
  3. CA pressure no higher than zero psig, rather than the Table 1 vacuum level
  4. DA pressure no higher than five psig, rather than the Table 1 vacuum level
Show answer and rationale

Correct: C. Section 82.156(a)(1)(i) creates this shortcut for medium-, high- and very high-pressure appliances. It applies only when the repair is not major and the appliance will not later be evacuated to atmosphere.

  • D — Five psig is the figure specifically for oil changes under 82.156(a)(1)(iii).
  • A — Table 1 is displaced by this provision when both of its conditions are satisfied.
  • B — Twenty-five millimetres of mercury absolute is the low-pressure appliance requirement.

Primary references

  1. 40 CFR Part 82 Subpart F — Recycling and Emissions Reduction — Office of the Federal Register (eCFR) · government · retrieved 2026-09-22, verified 2026-09-22
  2. Section 608 Test Topics — United States Environmental Protection Agency · primary · retrieved 2026-09-22, verified 2026-09-22