EPA 608 Type 3

A chiller containing 150 pounds of HCFC refrigerant is leaking above the leak rate threshold. Unless granted additional time, what must be completed within 30 days?

• Repair the appliance so that it leaks below the threshold and conduct the initial verification test

• Retrofit the appliance to a different natural refrigerant approved by ASHRAE.

• Document that all OEM replacement parts have been ordered.

• Notify the EPA of the leak rate and the time required to complete the repair.

A chiller with a charge of 200 pounds has passed the initial verification leak test. When must a follow ­up verification test be conducted?

• The same day.

• The next day.

• Within 10 days.

• Within 30 days.

A company uses a chiller that diverts 55% of its cooling capacity to one of its manufacturing lines and 45% of its cooling capacity to air condition the office spaces. Which leak rate category is this chiller in?

• Industrial process refrigeration

• Ice making refrigeration

• Commercial refrigeration

• Comfort cooling

A hydrostatic tube test kit will;

• determine if a tube leaks.

• blow all water out of tubes.

• remove water from a machine.

• vent refrigerant to the atmosphere.

A rupture disc on a recovery vessel for low-pressure refrigerants relieves at;

• 5 psig.

• 10 psig.

• 15 psig.

• 20 psig.

A typical setting for the high pressure cut-out control on a recovery unit used for evacuating the refrigerant from a low-pressure chiller is;

• 2 psig.

• 5 psig.

• 10 psig.

• 15 psig.

According to ASH RAE Guideline 3, the system should be checked for leaks if during a standard vacuum test the pressure in a system rises from 1 mm Hg to a level above;

• 1.5 mm Hg.

• 2.0 mm Hg.

• 2.5 mm Hg.

• 3.0 mm Hg.

After system servicing, and recharging, why is refrigerant vapor re-introduced to the chiller before refrigerant liquid?

• Vapor charging increases pressure slowly, preventing failure of the rupture disk.

• Vapor charging is faster than liquid charging.

• Liquid charging is more difficult to control than vapor charging.

• Liquid charged into a deep vacuum will evaporate and may lower the temperature freezing water in the heat exchanger tube bundle.

Approximately how much refrigerant vapor is left in an average 350-ton R-123 chiller at 0 psig once all the R-123 liquid has been removed?

• Trace amount

• 50 pounds

• 75 pounds

• 100 pounds

ASHRAE Standard 15-2013 requires the use of room sensors and alarms to detect;

• A1 refrigerants

• B2 refrigerants.

• A2 refrigerants.

• all refrigerant safety groups.