题目内容

( )may be defined as the process of adding heat to an enclosed space to maintain itstemperature above ambient.

A. Heating
B. Ventilation
C. Dehumidify
D. Refrigeration

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On board ships, temperature maintenance can be made easier by increasing the ratio ofrecirculated to fresh air. Most air conditioning units have( )for adjusting this ratio.

A. catch plates
B. dampers
C. regulating valves
D. fans

The cooling coil also performs the dehumidification function. If the coil temperature is below the air( ), water vapor will condense and air humidity will be lowered.

A. triple point
B. boiling point
C. solidifying point
D. dew point

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

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

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