8.12 - Practice Questions Set 1

Module: Type II High and Very-High-Pressure Appliances
Format: 25 original EPA 608-style multiple-choice practice questions; one best answer per question
Regulatory basis: Module 8 regulatory material verified August 12, 2026

Instructions

This 25-question set gives slightly more weight to equipment, components, and leak detection while still sampling all major Type II examination areas.

• Complete the set closed-book when using it as a mock exam.
• Choose the one best answer for each question.
• Do not check 8.15 - Answers and Explanations.md until the set is complete.
• Project readiness target: 22 correct out of 25 on two separate closed-book attempts.

Question 1

A field-connected mini-split air conditioner contains 4.5 lb of R-410A. Which Section 608 certification type applies to servicing its refrigerant circuit?

A. Type I, because the charge is 5 lb or less

B. Type II

C. Type III

D. Section 609 only

Question 2

A refrigerant has a liquid-phase saturation pressure of 150 psia at 104°F. Under the current Section 608 pressure definitions, how is the refrigerant classified?

A. Low pressure

B. Medium pressure

C. High pressure

D. Very high pressure

Question 3

In a typical receiver-equipped refrigeration system, which component normally stores high-pressure liquid refrigerant downstream of the condenser?

A. Suction accumulator

B. Receiver

C. Evaporator

D. Compressor crankcase

Question 4

A technician finds an oily residue around a flare fitting on a Type II system. What is the BEST interpretation?

A. The fitting is definitely leak-free because oil cannot escape with refrigerant

B. The system is definitely overcharged

C. The oil is a possible leak indicator and the location should be checked with an appropriate leak-detection method

D. The oil proves that noncondensables are in the system

Question 5

After refrigerant has been properly recovered, which gas should be used to pressurize a Type II system for a controlled pressure leak test?

A. Oxygen directly from the cylinder

B. Dry nitrogen through a regulator

C. Compressed shop air

D. Acetylene

Question 6

A commercial-refrigeration appliance contains 120 lb of an ODS refrigerant and has a calculated annual leak rate of 23%. Which statement is correct under the current Section 608 leak-repair rule?

A. The leak rate is below the current commercial-refrigeration trigger

B. The current commercial-refrigeration trigger has been exceeded

C. The current trigger is 35%, so no response is required

D. Commercial refrigeration has no leak-rate trigger

Question 7

Which appliance is within the current Section 608 § 82.157 leak-repair applicability threshold, assuming no special exclusion applies?

A. A commercial-refrigeration appliance with 80 lb of R-22

B. A commercial-refrigeration appliance with 80 lb of an HFC-only refrigerant

C. A comfort-cooling appliance with 40 lb of R-22

D. A comfort-cooling appliance with 20 lb of R-134a

Question 8

Before starting a self-contained recovery machine, what should a technician do with the machine’s recovery, purge, and other service valves?

A. Open every valve fully

B. Set them according to the recovery-machine manufacturer’s startup procedure

C. Leave them in the positions used on the previous job

D. Place the machine in purge mode for all recoveries

Question 9

A large receiver contains a substantial amount of accessible liquid refrigerant. When the recovery equipment and system configuration permit, which procedure will generally shorten recovery time?

A. Recover the bulk liquid first, then recover the remaining vapor

B. Recover vapor only from the beginning

C. Heat the recovery cylinder and recover vapor

D. Close the receiver outlet and wait for the pressure to fall

Question 10

A recovery cylinder is becoming warm and its pressure is increasing, slowing the recovery process. The cylinder is still within its allowable fill limit. What can manufacturer-permitted controlled cooling of the cylinder do?

A. Increase the allowable cylinder fill

B. Convert recovered refrigerant into reclaimed refrigerant

C. Reduce cylinder pressure and recovery-machine back pressure

D. Eliminate the need to monitor cylinder weight

Question 11

After a Type II appliance first reaches the required recovery endpoint, the technician isolates the recovery machine and the appliance pressure rises. What is the most likely explanation?

A. The recovery cylinder has become empty

B. Refrigerant may still be boiling from oil or evaporating from cold internal surfaces

C. The pressure rise proves the system has no refrigerant left

D. The technician should immediately vent the appliance

Question 12

A Type II appliance has a full charge of 22 lb, but only 8 lb remain after a leak. May ordinary portable system-dependent recovery equipment be used solely because less than 15 lb remain?

A. Yes, because only the amount remaining is considered

B. Yes, if the remaining refrigerant is vapor

C. No, because the current limitation is based on the appliance’s full charge

D. No, because system-dependent equipment is prohibited on every appliance

Question 13

A high-pressure appliance has a full charge of 75 lb. Recovery equipment manufactured in 2024 is used. What is the current Table 1 evacuation level before opening the appliance, assuming no exception applies?

A. 0 in. Hg vacuum

B. 4 in. Hg vacuum

C. 10 in. Hg vacuum

D. 15 in. Hg vacuum

Question 14

Using recovery equipment manufactured after November 15, 1993, which Type II condition requires the DEEPEST vacuum in the current Table 1?

A. Very-high-pressure appliance

B. High-pressure appliance with a 90-lb full charge

C. High-pressure appliance with a 250-lb full charge

D. Medium-pressure appliance with a 250-lb full charge

Question 15

In the current Section 608 evacuation table, what does the November 15, 1993 date refer to?

A. The manufacture date of the appliance

B. The manufacture or import date of the recovery/recycling equipment

C. The date the technician became certified

D. The date the refrigerant was produced

Question 16

A Type II repair is non-major, and all conditions of the current non-major service-practice provision are satisfied. Before the appliance is opened, it must be evacuated to a pressure no higher than:

A. 5 psig

B. 15 psig

C. 0 psig

D. 25 mm Hg absolute

Question 17

Which service activity is classified as major maintenance, service, or repair under the current Section 608 definition?

A. Removing and replacing the compressor

B. Replacing an access-port cap

C. Tightening an electrical terminal

D. Replacing an air filter

Question 18

A compressor has suffered a severe electrical burnout. Which service approach is most appropriate?

A. Install a new compressor and leave the existing filter-drier in place

B. Add refrigerant until acid is diluted

C. Treat the system as potentially contaminated and perform the required cleanup and filter-drier service

D. Vent the remaining refrigerant before removing the compressor

Question 19

A liquid-line sight glass has a moisture-indicator element that has changed color. How should the technician interpret the color?

A. Green always means wet on every manufacturer’s indicator

B. Yellow always means dry on every manufacturer’s indicator

C. Any color change proves the system is overcharged

D. Compare the observed color with the specific manufacturer’s moisture-indicator legend

Question 20

A reciprocating compressor’s discharge service valve is closed. What should the technician do?

A. Start the compressor briefly to build pressure

B. Do not energize the compressor until the required discharge flow path is open

C. Bypass the high-pressure control and start the compressor

D. Close the suction valve also, then start the compressor

Question 21

Why should a hermetic refrigerant compressor not be energized while the system is under a deep vacuum?

A. Internal electrical arcing and motor or terminal damage can occur

B. Vacuum permanently changes the refrigerant into a solid

C. The compressor will automatically reclaim the refrigerant

D. The vacuum increases the recovery-cylinder fill limit

Question 22

What is the principal purpose of a crankcase heater on a compressor when the system design requires one?

A. Increase condenser airflow

B. Increase the refrigerant leak rate

C. Reduce off-cycle refrigerant migration into compressor oil

D. Replace the high-pressure safety control

Question 23

Condenser airflow and refrigerant charge have been checked and found normal, but discharge pressure remains abnormally high. Which condition should also be considered?

A. A low-pressure receiver

B. A suction accumulator with no refrigerant

C. A clean filter-drier

D. Noncondensable gases in the system

Question 24

What is the primary purpose of a pressure-relief device on refrigeration equipment?

A. Maintain normal superheat

B. Provide emergency protection against dangerous overpressure

C. Measure liquid-line moisture

D. Control normal compressor cycling

Question 25

Before connecting recovery equipment to a very-high-pressure appliance, what is especially important?

A. Verify that the recovery machine, hoses, gauges, fittings, and cylinder are rated for the refrigerant and expected pressure

B. Use any standard HVAC manifold if the fittings match

C. Fill the recovery cylinder above its normal limit

D. Disable the recovery machine’s high-pressure safety

Score

Score: _____ / 25

Readiness target: 22 / 25

Detailed answers and explanations for all three Type II practice sets will be provided in 8.15 - Answers and Explanations.md.