單項選擇題

Since heat will not flow freely from a body at a （） temperature to another at a （） temperature, it is necessary to expend mechanical work, heat, or electrical energy from an external source to achieve refrigeration.

A.lower；higher
B.shallower；deeper
C.larger；smaller
D.higher；lower

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單項選擇題
In the process of （）, liquid changes into gas.
A.evaporation
B.frosting
C.condensing
D.compressing
單項選擇題
If the capacity of the refrigeration compressor is too large, the saturation temperature will （）.
A.rise
B.fall
C.be maintained constant
D.None of the above
單項選擇題
If the capacity of the refrigeration compressor is too small, the excess vapor will accumulate in the evaporator, causing the pressure to （）.
A.rise
B.fall
C.be maintained constant
D.None of the above is true
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In the refrigeration compressor the temperature of the vapor is （） by compression.
A.raised
B.risen
C.reduced
D.maintained constant
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It should be ensured that only （） vapor is handled by the refrigeration compressor.
A.humidity
B.dry
C.steam
D.oil
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A refrigerant gives up heat when it goes through （）.
A.condenser
B.regurgitate
C.evaporator
D.boil coil
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A refrigerant boils and vaporizes in the （） in a compression refrigeration system.
A.liquid receiver
B.compressor
C.condenser
D.cooling coil
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The latent heat of evaporation is dissipated in the （） in a compression refrigeration system.
A.evaporator
B.condenser
C.expansion valve
D.compressor
單項選擇題
A fluid coil will （） large quantifies of heat when it changes state from a vapor to a liquid.
A.release
B.absorb
C.develop
D.regenerate
單項選擇題
A fluid coil will （） large quantifies of heat when it changes state from a liquid to a vapor.
A.release
B.absorb
C.develop
D.regenerate

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