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The amount of expansion space to be left in a fuel tank when fuel oil is being received, is determined by the （）.
A . quantity of fuel to be received
B . flash point of the fuel as it is received
C . fuel temperature as it is received
D . viscosity of the fuel being received
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A common trouble with the fuel pump plungers or fuel valve spindle is （）.
A . broken down
B . stuck
C . oil leakage
D . carbonized
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When the fuel oil is burning in the combustion chamber, it （）.
A . gives up large amount of heat
B . gives off large amount of heat
C . gives up large amount of steam
D . gives off large amount of steam
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（）uses one or two high pressure pumps for all the cylinders with one more standby, while（）have a separate high-pressure pump for each cylinder.
A . A common rail engine；conventional engines
B . A conventional engine；common rail engines
C . A marine diesel engine；most other engines
D . A two-stroke engine；four-stroke engine
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The weather is often（）in a high-pressure area.
A . fine
B . cloudy
C . rainy
D . windy
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During the fuel injection period, fuel pressure must exceed cylinder gas pressure to （）.
A . ensure penetration and distribution of the fuel in the combustion chamber
B . ensure the needle valve is flushed clean during each injection
C . prevent combustion gas blowback into the open needle valve
D . prevent reflected pressure waves when the needle valve close
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The device used for low-pressure control and high-pressure cutout on a compressor is called （）.
A . cutout
B . controller switch
C . pressure controller
D . cutout switch
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Fix the fuel injector into （） after repair.
A . the cylinder liner
B . the cylinder cover
C . the cylinder jacket
D . the pisto
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When centrifuging heavy fuel oil, an important factor to consider is the （） (1) flow rate (2) viscosity of the fuel oil
A . (1) only is correct
B . (2) only is correct
C . both (1) and (2) are correct
D . neither (1) or (2) are correct
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The soot blowers are operating in the oil fuel boiler the air/fuel ratio must （） throughout the action, and blowers greased after use.
A . be increased
B . be decreased
C . remain constant
D . either be increased or remain constant
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The needle valve in a fuel valve will （） when the fuel pressure action on the needle valve tapered face exerts a force lower than that of the spring compression.
A . be jammed
B . be opened
C . be seated
D . be broke
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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
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The higher the cetane number, （） the ignition quality of the fuel.
A . the worse
B . the better
C . the smaller
D . the greater
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A dirty fuel oil filter is can be detected by （） Ⅰ.fuel oil analysis Ⅱ.observing the pressure drop across the filter
A . Ⅰonly
B . Ⅱonly
C . eitherⅠorⅡ
D . neitherⅠnor
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Air in the fuel lines to the fuel injection nozzles of a diesel will result in （）.
A . lower compression pressures
B . overheating without smoking
C . failure to start
D . a run away without load
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A common trouble with the fuel pump plunger or fuel valve spindle is （）.
A . water leakage
B . steam leakage
C . oil leakage
D . air leakage
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The fuel injector injects a fine spray of fuel into the hot air and combustion （）, producing much high pressure in the gases.
A . has begun
B . takes place
C . occurs
D . happe
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When normal operating pressure is applied to the hydraulic oil used in a high-pressure system, the oil （）.
A . viscosity will decrease
B . volume will increase
C . volume will decrease
D . pour point will be reduced
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You are transferring fuel from the storage tanks to the day tanks by means of an electric fuel oil transfer pumpIf the pump motor catches fire, you would FIRST （）.
A . secure the fuel manifold
B . shut off power to the pump
C . shut off the power ventilation
D . spray water on the fire
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During fueling operations, which of the listed precautions should be taken when topping off fuel tanks?（）
A . Reduce the pumping rate by closing the deck filling valve
B . Close all overflow valves
C . Place 5 gallon containers under all flange connections in the fuel line
D . Reduce the pumping rate and sound tanks frequently as the level rise
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Which of the following represents the significance the fuel oil cetane number?（）
A . The cetane number has no affect on injection lag
B . The cetane number is an indication of the fuel’s viscosity
C . Ignition lag is reduced with fuels having a high cetane number
D . The cetane number is of little significance in the combustio
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The fuel booster pump and steam to fuel heater, together with fuel pipe heater tracer line should be shut off as soon as the （） order is acknowledged.
A . finished with engines
B . stop
C . stand by
D . full ahead
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In purification, there is no fuel oil in the clean oil outlet.It could be caused by _____. I.too high temperature of the dirty fuel oil; II. too low temperature of the dirty fuel oil; III. Clogged filter
A．I
B．I．II．III
C．II．III
D．II
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Which of the following is the equivalent to fossil fuel？
A．Coal.
B．Petrol.
C．Natural gas.
D．Electricity.
此题为多项选择题。
