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Worksheets07. ACR-104 UNIT 22 PRACTICE TEST
Total questions: 10
Worksheet time: 5mins
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
