If a diesel engine fails to start，one of the likely causes is （）

A . must be centrifuged B . must by filtered C . must be changed D . is holding finely dispersed carbon in suspensio

A . turn engine with jacking gear B . drain filters and strainers and bleed off water at each injection pump C . use ether to start the engine with blow-down valves open D . blow through the cylinders and fuel lines with a drying agent

A . decrease until the engine speed increases B . increase as the load increases C . decrease as the load D . increases remain unchanged

A . low lube oil temperature B . low starting air temperature C . air in the fuel injection D . water in the starting air system

A . Full power cannot be developed B . The exhaust will contain black smoke C . Complete combustion will be impossible D . All of the above

A . place standby cooler in operation B . reduce engine load C . check thermostatic valve D . clean sea water strainer

A . inspection covers should not be opened until the engine has cooled B . ventilation system should be continued in operation for one hour for cooling C . scavenge pump should be immediately secured to prevent loss of lube oil D . explosion covers should be opened slightly to provide extra ventilatio

A . low air charge temperature B . high cranking speed C . excessive fuel dilution of lube oil D . high compression pressure

A . too light of a load B . injection timing is too early C . overloading of the engine D . too low of a compression ratio

A . fuel will not be properly atomized in the cylinder B . ignition will be delayed due to low ignition temperature C . maximum fuel expansion will occur on the compression stroke D . fuel will ignite before top dead center

A . Intake manifold pressure will be high B . Intake manifold pressure will be unaffected C . Exhaust temperatures will be high D . Exhaust temperatures will be low

A . fuel control rack had admitted excessive fuel B . engine speed does not match the fuel rack setting C . engine has failed to reach its firing speed D . starter pinion and ring gear contact is not correct

A . discharge a CO extinguisher in the air inlet B . pull off the distributor cap C . secure the jacket water D . secure the starting air supply valve

A . a cracked cylinder head B . a leaky cylinder head gasket C . a cracked cylinder liner D . any of the above

A . speed will drop drastically with any increase in load B . will stop due to zero fuel supply C . will stall upon application of load D . speed will remain fairly constant despite load change

A . low compression B . air-bound fuel system C . improper spark D . change in viscosity

A . air intake is restricted B . engine is cranked too fast C . vibration dampener is faulty D . exhaust back pressure is low

A . excessively late injection timing for each cylinder B . incorrectly adjusted intake valve timing C . incorrectly adjusted fuel injector D . incorrectly adjusted intake valve clearance

A . immediately open all crankcase relief ports B . increase crankcase exhauster speed to draw cool air into the engine C . allow the engine to cool naturally D . increase crank case scavenge air to remove unburned gase

A . low exhaust back pressure B . early fuel injection in one of the cylinders C . compression pressure in one of the cylinders D . plugged injector hole

A . excessive compression pressure B . air in the fuel lines C . high fuel pressure D . excessive load

A . liquid in the cylinder B . low compression in the cylinder C . high exhaust temperature D . poor fuel penetratio

A . compression pressures are below normal B . lube oil is diluted with fuel oil C . cranking speed is too low D . exhaust system is partially restricted

A.stop the engine immediately to prevent damage B.increase lube oil pressure C.slow the engine allowing it to gradually cool D.decrease the cooling water it temperature to the water jacket