更多"Fuels of high quality with their ea"的相关试题:
[单项选择]On the other hand, alternative fuels do have（）.
A. drawbacks
B. setback
C. drawer
D. backward
[单项选择]Fuels of different qualities may require advancing or retarding the injection timing, in addition to which if the injection timing is advanced when the engine is running at loads below the （）, then a saving in fuel can be achieved.
A. BHP
B. MCR
C. IHP
D. MEP
[单项选择]When comparing different fuels for different engines, the ignition quality of diesel fuel oils becomes a less critical consideration as （）
A. the amount of lube oil additives increase
B. piston speeds increase
C. injection pressure decrease
D. engine speeds decrease
[单项选择]A substance found in residual fuels which tends to cause exhaust valve corrosion and grooving, is（）
A. carbon
B. vanadium
C. calcium
D. hydrogen
[单项选择]The cetane number rates fuels for diesel engines according to its （）
A. antiknock characteristics
B. ignition qualities
C. rates of vaporization
D. viscosity
[单项选择]All of these alternatives are carbon-based fuels（）molecules are smaller and simpler than those of gasoline.
A. which
B. who
C. what
D. whose
[单项选择]As I had earlier made up my mind to run for governor, I could not（）I must go on with the fight.
A. vary
B. withdraw
C. undergo
D. discard
[单项选择]Had you come five minutes earlier, you（）the train to Birmingham. But now you missed it.
A. would catch
B. would have caught
C. could catch
D. should catch
[单项选择]If you had started loading earlier，you（）loading now.
A. would finish
B. will have finished
C. would have finished
D. will be finished
[单项选择]The ignition quality of diesel fuel is indicated by its（）
A. octane number
B. cetane number
C. viscosity in Saybolt seconds
D. air fuel ratio
[名词解释]maxims of quality and manner
[单项选择]The greater the pressure difference between a high and a low pressure center，the（）.
A. dryer the air mass will be
B. cooler the temperature will be
C. greater the force of the wind will be
D. warmer the temperature will be
[单项选择]“The use of a poor quality oil can lead to rapid deterioration of its properties with the resultant formation of deposits in the piston crown which in turn results in a considerable reduction in heat transfer with subsequent overheating and thermal cracking” According to this sentence, we can know that the principle reason of the overheating and thermal cracking is（）
A. the use of a poor quality oil
B. the deterioration of its properties
C. the formation of deposits
D. the reduction in heat transfer ability
[单项选择]High pressure and low pressure alarms must be tested（）.
A. no earlier than 24 hours prior to loading
B. no later than 24 hours prior to loading
C. anytime prior to loading
D. weekly
[单项选择]Because of the high loads the bearing material is a tin- aluminum alloy bonded to a steel shellThe crosshead pin is highly polished to a （）.
A. flat surface
B. mirror finish
C. sloping surface
D. inclined surface
[单项选择]As a high pressure system approaches，the barometer reading（）.
A. stays the same
B. falls
C. rises
D. falls rapidly
[单项选择]A crew member reports that the high-pressure alarm light of a low-pressure CO2 fixed fire extinguishing system is illuminated. The most probable cause of this condition would be that（）.
A. an air leak has developed in the tank
B. the tank cooling system has malfunctioned
C. the pilot cylinder discharge valve is leaking
D. an excessive amount of insulation has been installed on the tank and piping
[单项选择]High clouds，composed of small white flakes or scaly globular masses，and often banded together to form a mackerel sky，would be classified as（）.
A. cirrus
B. cirrocumulus
C. altostratus
D. cumulonimbus
