CHS T3

The owners and operators of any system that has 50 or more pounds of refrigerant charge must keep records of refrigerant added, leak inspections, initial verification tests, and follow-up verification tests for at least ________.

• A) 2 years

• B) 3 years

• C) 5 years

• D) 8 years or the life of the appliance, whichever is less

On a centrifugal chiller, the rupture disk is located ________.

• A) below the oil drain

• B) at the highest point on the condenser

• C) at the evaporator

• D) on the liquid receiver

The best method to determine a chiller's normal charge for leak rate calculations is to ________.

• A) measure the power consumption

• B) use the power consumption and compressor horsepower

• C) measure the chiller barrel dimensions

• D) use the charge stated on the equipment nameplate

Replacing ________ is ALWAYS considered a "major maintenance, service, or repair?"

• A) an evaporator

• B) a condenser

• C) a compressor

• D) all of the above

Pressure relief valves must NEVER be installed ________.

• A) in series

• B) in parallel

• C) on a short tubing run

• D) on a long tubing run

When does the EPA allow you to NOT evacuated to the prescribed level?

• A) When using a system-dependent recovery unit with a failed compressor.

• B) When the repair is minor and less than half the charge will be vented.

• C) When leaks in the appliance make evacuation to the prescribed level unattainable.

• D) When the approved recovery unit cannot achieve the EPA required evacuation level.

According to the EPA, when all the R-123 liquid has been removed from an average 350-ton R-123 chiller and the system vapor pressure is 0 psig, the system contains ________.

• A) trace amounts of refrigerant, which does not need to be recovered

• B) almost 10 pounds of refrigerant in the system

• C) 100 pounds of refrigerant in the system

• D) oil that must be recovered

After January 1, 2019, a leaking industrial process refrigeration system with a charge of 70 pounds must be repaired if the leak rate exceeds ________ of the normal charge per year.

• A) 5%

• B) 10%

• C) 20%

• D) 30%

Leak testing a low-pressure refrigeration system at pressures above 10 psig could damage the ________.

• A) compressor

• B) condenser

• C) purge unit

• D) rupture disc

The EPA suggests using ________ to remove ice from a sight glass.

• A) a flame

• B) a chisel

• C) Isopropyl alcohol

• D) flat-head screwdriver