07. ACR-104 UNIT 22 PRACTICE TEST

A device that passes outside air over water to remove the system heat is a ______

• cooling tower

• shell-and-tube condenser

• water tower

• shell-and-coil condensers

Natural draft, forced draft, and evaporative are all types of _______.

• refrigerant phases

• cooling towers

• wastewater systems

• package refrigeration systems

Condensing temperatures can be reduced by reducing the condenser surface area.

• True

• False

Check My Work

For every 1 degree rise in suction gas temperature returning to the compressor, there will be a _____ degree rise in the compressor’s discharge temperature.

• 1

• 30

• 5

• 10

A __________ can be piped into the high-side of the system to cycle the condenser fan on and off during a low ambient condition.

• thermostatic expansion valve (TXV)

• pressure control

• head pressure regulator (HPR)

• thermostat

On a system that uses condenser flooding to control head pressure during low ambient conditions, the receiver should be sized so that it is ___________.

• 100% full when it contains the entire system charge

• 50% full at all times, during all conditions

• 80% full when it contains the entire system charge

• 20% full when the system is operating during a low ambient condition

Any refrigerant receiver should be able to hold all of the system’s charge and still have a 25% vapor head for safety.

• True

• False

Condenser flooding is accomplished by _____________ in both mild and cold weather to keep the head pressure constant.

• having enough refrigerant in the system to raise the suction pressure

• having enough refrigerant in the system to flood the condenser

• applying heat to the compressor crankcase

• having enough refrigerant in the system to flood the evaporator

Low ambient controls are used on ___________ to maintain head pressure during low ambient conditions.

• waste water systems

• water-cooled condensers

• cooling towers

• air-cooled condensers

__________ systems use water once, it is then piped to a drain.

• Air-cooled condenser

• Wastewater

• Recirculating water

• Package