更多"Which of the substances listed is s"的相关试题:
[单项选择]Which of the substances listed is satisfactorily removed from the fuel by a centrifugal oil purifier?（）
A. Impurities
B. Lube oil
C. Gasoline
D. Diesel fuel
[单项选择]Which of the listed substances can be satisfactorily removed from diesel fuel by centrifuging?（）
A. Sludge
B. Gasoline
C. Fuel oil
D. Lube oil
[单项选择]A centrifuge will satisfactorily remove which of the following contaminants from fuel oil?（）
A. Gasoline
B. Water
C. Lubricating oil
D. sulphur compounds
[单项选择]Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
A. Sensitivity
B. Power
C. Speed droop
D. Compensation
[单项选择]Which of the routine maintenance procedures listed is required for starting air receivers?（）
A. over-speeding
B. overload
C. low exhaust temperature
D. high crankcase pressure
[单项选择]Which of the listed statements is a characteristic of the liquid charged power element used with thermostatic expansion valves?（）
A. At the designed operating temperature, the liquid refrigerant charge has changed to a vapor
B. The liquid refrigerant tends to collect at the bellows or diaphragm and reduces the valve sensitivity
C. The sensing bulb is empty of liquid refrigerant charge at the designed operating temperature
D. The sensing bulb is never emptied of liquid refrigerant under normal operating conditions
[单项选择]Which of the listed cylinder liner surface conditions indicates proper lubrication?（）
A. Dull black appearance
B. Bright appearance
C. Thin layer of lacquer
D. Thick oily film
[单项选择]Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?（）
A. Pressure-reducing valve
B. Unloading valve
C. Counterbalance valve
D. Pressure-relief valve
[单项选择]Which of the listed diesel engine operating conditions should be checked immediately after any diesel engine is started?（）
A. Exhaust temperature
B. Lube oil level
C. Lube oil pressure
D. Water level in the expansion tank
[单项选择]Which of the listed materials would be considered as a bunting class "C" fire?（）
A. Fuel oil
B. Wood
C. Celluloid
D. Electrical insulation
[单项选择]Which of the listed statements is correct concerning refrigeration systems?（）
A. Dehydrators must be used continuously in a refrigeration system
B. A 25 ton refrigeration system has the same cooling effect as melting 25 tons of ice in 24 hours
C. A thermostatic expansion valve is used to control refrigerated space temperature
D. The liquid receiver functions to collect and remove non- condensable gases
[单项选择]Basically the bedplate consists of two （）, which run the length of the engine.
A. longitudinal girders
B. transverse girders
C. fore girders
D. aft girders
[单项选择]Which of the processes listed consumes the greatest amount of power while producing the greatest amount of heat?（）
A. Overcoming sliding friction
B. Overcoming rolling friction
C. Overcoming fluid friction
D. Overcoming oil wedge friction
[单项选择]Which of the circumstances listed is an exception to the garbage discharge requirements in Annex V to MARPOL 73/78?（）
A. The garbage to be discharged will sink
B. Garbage accumulation onboard has exceeded storage space
C. A person falls overboard, and a plastic ice chest is thrown for flotation
D. The destination port or terminal cannot receive garbage
[单项选择]Which of the conditions listed represents the greatest effect of excess frost accumulation on the evaporator coils?（）
A. Keeps the refrigerated space cooler
B. Reduces the efficiency of the plant
C. Takes the load off the compressor
D. Has no affect on the system
[单项选择]Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?（）
A. Exhaust and scavenging
B. Scavenging and compression
C. Ignition and expansion
D. Exhaust and compression
[单项选择]Which of the combustion parameters listed is used in a diesel engine, but NOT related to the injection system?（）
A. Atomization
B. Metering
C. Effective stroke
D. Penetration
[单项选择]Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
A. Impeller
B. Compressor
C. After-cooler
D. Exhaust differ
[单项选择]Which of the listed components is considered to separate the high pressure side of a refrigeration cycle from the low pressure side of the cycle?（）
A. The condenser and the expansion valve
B. The king valve and the solenoid valve
C. The compressor and the expansion valve
D. The condenser and the solenoid valve
