Unit 22 Refrigeration System Quiz

The refrigerant in a condenser in a refrigeration system ____.

• absorbs heat

• rejects heat

• changes to a vapor

• is under lower pressure than the evaporator

Tags

NGSS.HS-PS3-4

The condenser in a refrigeration system ____.

• desuperheats the vapor from the compressor

• condenses the vapor from the compressor

• subcools the liquid refrigerant before it leaves the condenser

• All of the above.

A normally operating water-cooled condenser is operating with a 10°F differential between water in and water out. If scale forms on the water tubes and the entering water is 85°F, which of the following is possible?

• The outlet water temperature will be lower than expected.

• The system head pressure will rise.

• The water regulating valve will close.

• Both a and b are correct.

Tags

NGSS.HS-PS3-4

Mineral deposits on the water side of a water-cooled condenser act as a(n) ____.

• conductor of heat

• insulator

• cleaning solution

• They have no effect on the operation of the condenser.

Tags

NGSS.HS-PS3-4

The shell-and-tube condenser is cleaned ____.

• with a brush after removing the end caps

• only with chemicals

• with compressed air

• with a vacuum cleaner

In a water-cooled condenser, a regulating valve is used to control the ____.

• refrigerant flow through the pressure reducing device

• refrigerant head pressure

• suction pressure

• water temperature

What can be used to maintain the head pressure of a system with a water-cooled condenser?

• Fan cycling.

• Dampers or louvers.

• Water regulating valve.

• All of the above.

Tags

NGSS.MS-PS3-3

The typical design temperature for the water entering a recirculating water system condenser is 85°F, and most systems have a ____ rise across the condenser.

• 10 degrees

• 15 degrees

• 5 degrees

• 20 degrees

Tags

NGSS.HS-PS3-4

An air-cooled condenser that is operating in a climate that has four distinct seasons must ____.

• have some type of head pressure control

• use a water regulating valve

• have a multi-circuit evaporator

• operate with zero degrees of subcooling

A water regulating valve helps to maintain a system's head pressure by modulating the flow of refrigerant through the condenser.

• True

• False

Tags

NGSS.MS-ETS1-1

NGSS.MS-PS3-3