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 （）.

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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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• If the temperature drops low enough, oil will not flow, （） just tell us the temperature.

  A . Hash point B . Viscosity C . Pour point D . Cetane number

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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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• If the cooling water temperature and the lube oil temperature in a diesel engine are too high, the cause can be （）

  A . a dirty lube oil strainer B . internal water leaks C . an oil suction line restriction D . excessive wears of the cooling water pum

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• Ambient temperature is the （）.

  A . amount of temperature rise with no load B . temperature of the compartment where the motor is located C . normal operating temperature, less the room temperature D . amount of temperature developed by an operating motor

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• Water evaporates or steam condenses at the saturation temperature, which depends upon the pressure, the higher the pressure （） the saturation temperature.

  A . the more B . the higher C . the lower D . the highest

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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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• In a diesel engine cooling system, the high temperature alarm contact maker will be activated on excessively high water discharge temperature from the （）

  A . raw water pump discharge B . expansion tank outlet C . cooling water heat exchanger D . outlet engine jacket water outlet

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• The (auto)ignition temperature is that temperature atwhich（）.

  A . no spark or flame is required to ignite gas or vapor B . a fuel begins to give off explosive vapors C . a fuel if ignited will continue to burn D . a 1% mixture of the fuel with air will explode

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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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• If a large difference exists between the compressor discharge pressure and the pressure corresponding to the existing condensing temperature in a refrigeration system, you should（）.

  A . increase the flow of the cooling water through the condenser B . adjust the high pressure cutout to maintain the desired pressure C . open the hot gas bypass temporarily to reduce capacity D . purge non-condensable gases to reduce the excess pressure

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• A large change in ambient temperature, or using an oil of a viscosity different from the one recommended by the manufacturer in a mechanical hydraulic governor, will result in the need to adjust the （）.

  A . pilot valve opening B . compensating needle valve C . compensating spring tension D . accumulator spring tensio

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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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• If the compressor-discharge temperature is higher than the receiver temperature（）

  A . increase the amount of cooling water to the condenser B . decrease the amount of cooling water to the condenser C . add more refrigerant to the system D . remove some of the refrigerant from the system

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• The operating diesel generators will have their exhaust temperatures, cooling water and lubricating oil temperatures and pressures （） in much the same way as for the main engine.

  A . to be kept B . logged C . changed D . has remained

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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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• . The temperature today is about 68 degrees. That's the temperature in ______________.

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• I am just surprised that, given the vast difference between winter and summer temperatures in Connecticut, they can still_____like they are partying on the beach in the middle of February

  A.look B.hold C.seem D.show

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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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• Temperature affects the viscosity of oil.（)

  是 否

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• – What’s the temperature today –（) .

  A.Nice and cool B.The weather forecast says it’s fine C.About 18 degrees D. Sure, it’s sunny

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

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• 气体的粘度随压力增高而增高。在低压时，气体粘度随温度升高而增加，随着压力的增加，温度升高对粘度增大的影响越来越小，当压力很高时（100×105Pa以上），气体粘度随温度升高而降低，明显表现出类似于液体的性质。Table 1-13 shows the dynamic viscosity of methane at different pressures and temperatures. It can be seen from the table that the viscosity of gas increases with the increase of pressure. At low pressure, the gas viscosity increases with the increase of temperature. With the increase of pressure, the influence of temperature increase on the inc

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