更多"If the temperature in the icebox is"的相关试题:
[单项选择]High exhaust temperature and black smoke exhausting from an auxiliary diesel engine can be caused by （）.
A. engine overload
B. low combustion temperature
C. plugged fuel nozzle holes
D. excessive compression pressure
[单项选择]CFC refrigerants exposed to high temperature or direct flame, will decompose and may produce（）
A. methyl chloride
B. ammonia
C. hydrofluoric acid
D. ozone
[单项选择]A high temperature alarm or （） which will melt is used to guard against the explosion of compressor air pipelines.
A. a flame trap
B. a relief valve
C. a fusible plug
D. a bursting cap
[单项选择]If exhaust temperatures are too high, you should check （）.
A. air cooler
B. turbocharger
C. charge air
D. A+B+C
[单项选择]If the head pressure is too high,（）
A. the relief valve should open before the high-pressure cutout
B. the relief valve should open and let excess refrigerant go to receiver
C. the high-pressure cutout switch should operate before the relief valve opens
D. close in on the suction valve
[单项选择]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
[单项选择]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
[单项选择]Temperature and moisture characteristics are modified in a warm or cold air mass due to （）.
A. pressure changes in the air mass
B. movement of the air mass
C. the heterogeneous nature of the air mass
D. upper level atmospheric changes
[单项选择]（）is the temperature today?
A. What
B. How
C. How many
D. How much
[单项选择]Temperature control valves installed in the jacket cooling water system of a diesel engine modulates the rate of water flow through the （）.
A. cooling water pump
B. nozzle cooling passages
C. cylinder jackets
D. heat exchanger
[单项选择]Air temperature varies with（）.
A. the altitude above sea level
B. the season of the year
C. the latitude or distance from the equator
D. All of the above
[单项选择]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
[单项选择]Higher than normal temperature air passing through the intake of a diesel engine will result in（）
A. greater overall efficiency
B. greater fuel economy
C. lower horsepower
D. lower compression ratio
[单项选择]A lower thermostatic temperature setting will provide a desired degree of comfort in a room where （）
A. low relative humidity is maintained
B. triple banded squirrel cage fans are used
C. air circulation is a maximum
D. high relative humidity is maintained
[单项选择]The saturation temperature of the refrigerant must be （） that required in the evaporator refrigerated space.
A. above
B. below
C. equal to
D. None of the above
[单项选择]To determine the pressure and temperature limitations under which LFG is required to be transported on a barge，you should look at the（）.
A. Certificate of Inspection
B. loading order
C. rules and regulations for tank vessels
D. tankerman's document
[单项选择]In the refrigeration compressor the temperature of the vapor is （） by compression.
A. raised
B. risen
C. reduced
D. maintained constant
[单项选择]The dew point temperature is（）.
A. always higher than the air temperature
B. always lower than the air temperature
C. equal to the difference between the wet and dry bulb temperatures
D. the temperature at which the air is saturated with water vapor
