题目内容

( )for cargo spaces and living spaces are normally based on a given number of air changesper hour.

A. Ventilation requirements
B. Air-conditioning
C. Air requirement
D. Air quality

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An exhaust fan is commonly installed to avoid excessive( )air pressure in the space.

A. plus
B. negative
C. minus
D. positive

( )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

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

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