CHS T1

________is an approved refrigerant for new household refrigerators, freezers, and combination refrigeration/freezers.

• A) R-600a

• B) R-1234yf

• C) R-1234zd

• D) R-1234ze(E)

Always look for oil contamination when recovering refrigerant because ________.

• A) contaminated oil is hard to remove from the refrigerant

• B) contaminated oil indicates the system will need to be flushed

• C) contaminates destroy recovery tanks

• D) if the refrigerant is contaminated, it does not need to be recovered

Recovered R-410A ________.

• A) can be recovered into a recovery tank containing R-32 or R-125 because R-410A is a mixture of those two refrigerants

• B) can only be recovered into a tank containing R-407C

• C) can only be recovered into a tank containing R-22 and not R-407C

• D) can only be recovered into an evacuated tank or a tank containing R-410A

If you encounter a small appliance that is leaking, ________.

• A) you must repair the leak within 30 days

• B) you must document all attempts to repair the leak

• C) you do not have to repair the leak

• D) you must recover all remaining refrigerant and dispose of the appliance

For a system with an operating compressor and a restricted capillary tube, what is the minimum number of access valves needed and where would you place them?

• A) Only one access valve on the low side of the system

• B) Only one access valve on the high side of the system

• C) Two valves, one on the high side and one on the low side of the compressor

• D) Three valves, one on the high side and one on the low side of the compressor and the third at the condenser outlet

What is the pressure of a storage cylinder of R-404A, that is stored in a room where the temperature is 100 °F?

• A) 68 psig

• B) 237 psig

• C) 319 psig

• D) 488 psig

A small appliance is defined as a system that is ________.

• A) manufactured, fully charged, and hermetically sealed in a factory with a charge of 5 pounds or less

• B) manufactured, fully charged, and hermetically sealed in a factory with a charge of 15 pounds or less

• C) an appliance with a compressor under one-third horsepower

• D) any assembly of pre-charged components with a charge of less than 2 pounds per component

The maximum allowable factory charge for a Type I appliance is ________.

• A) 1 pound

• B) 3 pounds

• C) 5 pounds

• D) 7 pounds

A process stub is a ________.

• A) straight piece of tubing that is entered using a piercing access valve

• B) line located at least 3 inches below the compressor

• C) service valve installed at the factory

• D) stub to allow additional compressors to be connected in parallel

Type I technicians can service any ________.

• A) appliances with 5 pounds or less of refrigerant that have been hermetically sealed and charged at the factory

• B) appliances with 5 pounds or less of refrigerant including split systems

• C) open-drive (non-hermetic) system if the charge is less than 5 pounds

• D) any MVAC or MVAC-like system