If a diesel engine runs roughly, which of the systems listed is most likely to be at fault?（）

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

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

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

A . testing for the mechanical load and the thermal load B . inspecting thermal and mechanical condition of the engine C . inspecting each system and exhaust temperature D . testing for compress pressure and explosion pressure

A . The diesel oil must never be allowed to mix with the heavy fuel B . The temperature of the fuel from the pre–heater should be gradually reduced after switching over the three–way valve C . The heating steam to the pre-heater should be secured as soon as the diesel fuel passes through the three-way valve D . The heating steam must be secured before the diesel oil passes through the three-way valve

A . low compression temperature B . low ambient air pressure C . high lube oil pump pressure D . high fuel oil booster pump 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 . late ignition B . water in the fuel C . high compression temperature D . starting valve stuck ope

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 . Large crosshead type；crossheads B . High speed；the cylinders C . Large crosshead type；the cylinders D . Four-stroke；pistons and cylinder

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 . 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 . residual carbon deposits B . lube oil viscosity breakdown C . uneven heat expansion of the rings D . uneven heat expansion of the pisto

A . 525 RPM B . 775 RPM C . 1550 RPM D . 1800 RPM

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 . notify the duty officer, reduce the engine speed, take some measures to remove failures B . notify the duty officer and stop the engine immediately, find the cause and remove failures C . notify the C/E D . notify the captai

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