ACR-103 Homework week 9

Front

A graduated cylinder charging device is a device that ____.

Back

measures refrigerant by volume for precise refrigerant charging, has a compensation dial for adjusting for the temperature of the refrigerant, often has a heater to keep the refrigerant temperature from dropping when refrigerant is released into the system.

Front

If 22 oz. of refrigerant are to be added to a refrigeration system and the supply cylinder weighs 24 lb. 12 oz. before any is added, what will be the supply cylinder weight after the system has been charged?

Back

23 lb 6 oz.

Front

If 30 oz. of refrigerant are to be added to a refrigeration system and the supply cylinder weighs 26 lb. 4 oz. before any is added, what will the supply cylinder weigh after the system has been charged?

Back

24 lb 6 oz.

Front

If a critically charged refrigeration system is overcharged, which of the following is a likely result? Increased cooling capacity, Reduced compressor discharge temperature, Increased system efficiency, Increased operating pressures.

Back

Increased operating pressures.

Front

Fractionation occurs when ____.

Back

some of a blended refrigerant evaporates or condenses before the rest of the blend

Front

When charging a refrigeration system with a near-azeotropic mixture, what must be done to prevent liquid from entering the system?

Back

Charge as a liquid through the low side using a restrictor.

Front

A manufacturer's charging chart may be used when available to determine the correct charge for a system.

Back

True

Front

Glide is the range of temperatures/pressures in which a blended refrigerant will condense.

Back

True