The temperature of the earth depends on a _______ which is given by the sun.

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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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• The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?（）

  A . Cross B . Parallel C . Counter D . Circular

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• The dew point of air is reached when the wet bulb temperature is （）.

  A . Twice the dry bulb temperature B . 10℃ above the dry bulb temperature C . 5℃ above the dry bulb temperature D . Equal to the dry bulb temperature

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• A cargo hold has been determined to have a relative humidity of 80% and a dry bulb temperature of 80 ℃ and a dry bulb temperature of 85℃.When the hold is sealed and the dry bulb temperature decreases, the relative humidity in the space will （）

  A . decrease B . increase C . decrease to zero D . remain unchanged

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• The temperature of the refrigerant in the evaporator coil depends mostly upon the （）.

  A . refrigerant pressure in the evaporator B . cooling water temperature to the condenser C . heat load in the refrigerator compartment D . solenoid valve in the liquid line

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• As the temperature for a given mass of air increases，the（）.

  A . dew point increases B . dew point decreases C . relative humidity increases D . relative humidity decrease

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• Which of the following relationships should occur between the temperature developed in a combustion space, and the compression ratio of the engine?（）

  A . Higher compression ratios create higher temperature B . Higher temperatures create higher compression ratios C . low temperatures create higher compression ratios D . Higher compression ratios create low temperature

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• As the temperature of an air mass decreases，the（）.

  A . absolute humidity decreases B . relative humidity increases C . specific humidity decreases D . dew point rise

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• The temperature of a refrigerant gas is the highest （）.

  A . at the compressor discharge B . at the compressor suction C . in the expansion valve D . in the receiver

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• The temperature difference between the inlet and outlet temperature of the lube oil cooler in the lubricating system for the diesel engine is generally between （）.

  A . 8-10℃ B . 10-12℃ C . 10-15℃ D . 10-20℃

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• The temperature of the fuel oil received during bunkering operations is critical in determining the（）

  A . expansion space to leave in a tank B . flash point at which the fuel will burn C . temperature to which the fuel must be heated D . rate at which the fuel can be pumped during transfer operatio

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• （） is used for sensing the temperature of the room in the air condition system.

  A . An expansion valve B . An evaporator C . A thermostat D . A condenser

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• As the temperature for a given mass of air increase, the（）.

  A . dew point increase B . dew point decreases C . relative humidity increases D . relative humidity decrease

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• The rising of the exhaust temperature in manifold pipe may NOT result from （）.

  A . too great a loading B . fouled turbocharger C . bad combustion D . excessive air

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• Sub-cooling is a method of reducing the temperature of the liquid refrigerant below its （）.

  A . freezing point B . floc point C . condensing temperature D . compression temperature

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• The flash point of a liquid refers to the temperature （）

  A . at which a liquid will give off inflammable vapors B . at which a liquid will burn steadily C . at which a liquid will explode D . that a liquid must reach before it will flow readily

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• As the temperature of the air reaches the dew point，（）.

  A . rain must develop B . fog may form C . it begins to snow D . water freeze

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• Among the rings of a piston the （） one is subjected to the greatest load and temperature.

  A . bottom B . middle C . top D . none of the above

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• When the temperature of the refrigerant flowing out from the condenser is below the condensing temperature, it is said to be （）.

  A . dry B . wet C . super-cooled D . superheated

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• （In) warm-blooded animals, their body temperature, regardless of the temperature of the an

  (In) warm-blooded animals, their body temperature, regardless of the temperature of the animals' (surroundings), (are) maintained within narrow (limits). A．In B．surroundings C．are D．limits

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• The outside air's temperature determines the amount of extra heating needed in the ripening room.

  A．Y B．N C．NG

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• Which of the following is NOT true ofCrystal Ear？

  A．it is highly sensitive． B．It is powerful． C．It is invisible． D．It is wireless．

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• Temperature affects the viscosity of oil.（)

  是 否

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• The （） the temperature, the greater the retardation of food degradation

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• The himalayan allele in rabbits produces dark fur at the extremities of the body—on the nose, ears, and feet. The dark pigment develops, however, only when a rabbit is reared at a temperature of 25°C

  A．temperature-sensitive allele B．dominance C．discontinuous characteristic D．genetic imprinting E．phenocopy

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