EPA 608 Type II Practice Test 2

Question 1

What is the recovery requirement for a Type II system with a full charge of less than 200 lbs, using recovery equipment manufactured after November 15, 1993?

Accepted Answer

Evacuate to 4 inches of mercury vacuum

Answer

Evacuate to 0 psig

Answer

Evacuate to 10 inches of mercury vacuum

Answer

Evacuate to 15 inches of mercury vacuum

Question 2

In a Type II refrigeration system, what is superheat and why is it important?

Accepted Answer

The temperature rise of suction gas above its saturation temperature; it ensures only vapor enters the compressor

Answer

The temperature of the discharge gas above ambient; it indicates condenser efficiency

Answer

The difference between supply and return air temperatures across the coil

Answer

The number of degrees the refrigerant must be cooled in the condenser

Question 3

A rooftop unit charged with R-410A shows high subcooling at the liquid line. What does this most likely indicate?

Accepted Answer

The system is overcharged with refrigerant

Answer

The system is undercharged with refrigerant

Answer

The expansion valve is overfeeding refrigerant

Answer

The condenser fan motor is running too fast

Question 4

What is the function of a crankcase heater on a Type II reciprocating compressor?

Accepted Answer

To keep the compressor oil warm during the off-cycle, preventing refrigerant migration into the oil

Answer

To preheat suction gas to increase compression efficiency

Answer

To maintain oil viscosity during high-load summer operation

Answer

To prevent condensate from forming inside the motor windings

Question 5

When using a manifold gauge set on a Type II high-pressure system, what does a higher-than-normal suction pressure combined with lower-than-normal discharge pressure most likely indicate?

Accepted Answer

Compressor valve failure (worn or broken valves)

Answer

System overcharge with refrigerant

Answer

Refrigerant leak on the suction side

Answer

Condenser coil fouling with debris

Question 6

Under EPA Section 608, which of the following is NOT required information in the service record for a system with over 50 lbs of charge?

Accepted Answer

Manufacturer's serial number of the recovery machine used

Answer

Amount of refrigerant added at each service visit

Answer

Name and certification number of the technician

Answer

Date of each service involving refrigerant addition