In order to maintain the desired( )in the conditioned spaces, the HVAC system must addor remove thermal energy to or from the space.
A. temperature
B. humidity
C. temperature or humidity
D. temperature and humidity
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The purpose of the( ). in the vapor compression cycle is to accept the low-pressure dry afrom the evaporator and raise its pressure to that of the condenser.
A. condenser
B. compressor
C. evaporator
D. expansion valve
The purpose of the expansion valve is to control the flow of refrigerant from the high-pressescondensing side of the system into the low-pressure( )
A. condenser
B. expansion valve
C. evaporator
D. compressor
When cooling is by direct expansion, a separate( )is fitted in the unit for winter heating.
A. central heater
B. electrical heater
C. hot water coil
D. steam heater coil
If air at 95 'C dry bulb temperature and 50% relative humidity is conditioned to 75 C dry bulbtemperature and 50% relative humidity, it is an example of( )
A. cooling only
B. cooling and humidifying
C. cooling and dehumidifying
D. adiabatic cooling