Refrigerant Quiz 10

A graduated cylinder charging device is a device that ____.

• Measures refrigerant by volume for precise refrigerant charging

• Has a compensation dial for adjusting to the temperature of the refrigerant

• often has a heater to keep the refrigerant temperature from dropping when refrigerant is released into the system

• All of the above

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

• True

• False

Tags

NGSS.HS-PS3-3

Charging a refrigeration system refers to ____.

• removing refrigerant from a system

• adding refrigerant to a system

   

• cleaning the refrigerant

• vaporizing the refrigerant

   

Fractionation occurs when ____. .

• the operating pressures of a system increase

• Both a and c.

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

   

• when only a fraction of the total charge has been added

  to a system

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

• True

• False

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?

• 23 lb 12 oz.

• 22 lb 12 oz.

• 22 lb 6 oz.

• 23 lb 6 oz.

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 weight after the system has been charged?

• 22 lb 8 oz.

• 24 lb 6 oz.

• 24 lb 8 oz.

• 22 lb 4 oz.

Tags

NGSS.MS-PS1-5

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.

If the tank is a reusable tank, there are no check valves and system refrigerant can enter the tank as long as the system pressure is higher than the pressure in the tank.

• True

• False

One good feature of an electronic charging scale is that it counts upward as refrigerant is removed, to tell the technician how much refrigerant was used.

• True

• False