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

[单选题]When the fuel oil is burning in the combustion chamber, it （）.A . gives up large amount of heatB . gives off large amount of heatC . gives up large amount of steamD . gives off large amount of steam

[单选题]When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.A . filter to remove the fuel oilB . use the settler to remove the fuel oilC . remove the fuel oil by centrifugingD . drain and then renew the lube oil supply

[单选题]When centrifuging heavy fuel oil, an important factor to consider is the （）(1) flow rate(2) viscosity of the fuel oilA . (1) only is correctB . (2) only is correctC . both (1) and (2) are correctD . neither (1) or (2) are correct

[单选题]The quality of the fuel oil and lube oil （）, Im afraid.A . has much to do with the operation of the engine and its lifeB . have much to do with the operation of the engine and its lifeC . has much doing with the operation of the engine and its lifeD

[单选题]In a typical fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to （） and heated.A . a service tankB . a collecting tankC . a sumpD . a settling tank

[单选题]The burning of the fuel adds more heat to the air charge, causing it to expand and force the engine piston to do work on the crankshaftWhat does “it” mean in this sentence?（）A . the burningB . the fuelC . the air chargeD . the engine pisto

[单选题]Fuel injectors used in heavy fuel oil systems are usually provided with cooling to reduce（）.A . cold corrosion of the nozzlesB . fuel viscosity for better atomizationC . carbon accumulation on the nozzlesD . fuel detonation in the cylinder

[单选题]If there is water in fuel oil, the revolution of the engine will （）.A . decreaseB . increaseC . be dismantledD . be reassembled

[单选题]Improper maintenance of the fuel oil burners in an automatically fired auxiliary boiler, could result in （）A . increased fuel consumptionB . increased feed water consumptionC . fuel pump failureD . combustion control system failure

[单选题]Fuel oil begins injection into the cylinder of a four-stroke/cycle diesel engine during the （）.A . intake strokeB . exhaust strokeC . power strokeD . compression stroke