ACR-202 Unit 29.1-29.10-Mr.Graham

To begin troubleshooting any area of a refrigeration system, you need some idea of what

• the nameplate reads.

• the voltage reads.

• the typical conditions should be.

• the refrigerant is in the system.

An evaporator acts the same whether there is a single compressor close to the evaporator or a large compressor in the equipment room.

• True

• False

The box humidity conditions will not determine the coil-to-air temperature difference for a particular application.

• True

• False

Medium-temperature refrigerated box temperatures range from about____ to___ in the refrigerated space.

• 30°-50°

• 32°-42°

• 30°-45°

• 35°-45°

Low-temperature applications start at freezing and go down in temperature, although not many are designed for just below freezing.

• True

• False

Air-cooled condensers have an operating temperature range from cold to hot as they are exposed to inside temperatures.

• True

• False

Most air-cooled condensers will condense the refrigerant at a temperature of about 30° above the ambient temperature when the ambient is above 70° .

• True

• False

Many newer, more environmentally friendly replacement refrigerants are being introduced into the HVAC/R industry.

• True

• False

Water-cooled condensers are used in many systems in two ways. Pick one.

• Tap water

• Spring water

• Well Water

• Wastewater

A water-regulating valve is normally used to regulate the water flow for economy and to regulate the head pressure.

• True

• False