Smaller engines can be made more rigid than large ones and may not have （）.

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• Auxiliary diesel engines can be automatically shut down as a result of （）

  A . low lube oil temperature B . low lube oil pressure C . high exhaust temperature D . high cooling water pressure

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• White smoke exhausting from a diesel engine can be caused by （）

  A . low combustion temperature B . a leaking fuel nozzle check valve C . late fuel injection D . plugged oil-scraper ring hole

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• Bridge gauge can be used to measure （） of a diesel engine.

  A . diameters of journals B . deflections of crankwebs C . diameters of crankpins D . none of the above

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• A dark exhaust from a running diesel engine can be caused by （）

  A . late ignition B . water in the fuel C . high compression temperature D . starting valve stuck ope

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• A few spots of turbocharger can be caused by（） ①crash stop of engine ② rapid increased of engine speed

  A . ①only is correct B . ②only is correct C . both ① and ②are correct D . neither ① or ② correct

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• Poor combustion in a diesel engine can be caused by （）.

  A . high compression pressure B . low intake air temperature C . low exhaust pressure D . high scavenge air pressure

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• Combustion knock occurring in a diesel engine can be caused by （）

  A . low coolant temperature B . insufficient fuel C . high ambient temperature D . carbon buildup on the injector ti

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• In an operating diesel engine, pre-ignition can be caused by （）

  A . excessively late fuel injection B . oil in the air charge C . water in the fuel D . injection continuing after the fuel charge is ignited

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• Smaller engines can be made more rigid than large ones and may not have （）.

  A . connecting rods B . crankshaft C . crankcase D . through bolt

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• The indicated power of an engine can be obtained by taking the （）.

  A . precautions B . rpm C . indicator cards D . B and C

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• At least （） cylinders in four-stroke engine will be configured to ensure that the engine can be started with the crankshaft at whatever position.

  A . 6 B . 2 C . 12 D . 8

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• Black smoke exhausting from an operating diesel engine can be caused by （）

  A . fuel dribbling from leaking fuel injectors B . burning fuel with a high carbon content C . burning fuel with a high vanadium content D . burning fuel with a lower sulphur content

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• Low compression in a diesel engine can be caused by （）

  A . clogged coolant passages B . a leaking cylinder head gasket C . low fuel oil pressure D . worn or broken cylinder liner sealing ring

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• High diesel engine cooling water temperatures can be caused by （）.

  A . a worn water pump B . not enough coolant C . air in the cooling system D . all of the above

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• Lubricating oil viscosity in an operating diesel engine can be reduced by（）

  A . increasing cooling water flow B . increasing lube oil flow C . dilution by fuel oil D . adding SAE 70 oil

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• （） of an engine crankshaft can be detected by measuring deflections of crank webs for each unit of the engine.

  A . Misalignment B . Length C . Strength D . Stresse

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• A dirty diesel engine oil filter element can best be detected by （）.

  A . visual inspection of the elements B . the pressure drop across the filter C . high lube oil sump temperature D . decrease in oil viscosity from the filter

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• Main diesel engine control can be obtained by the bridge （）

  A . at any time B . only after the engine room control station is switched to ‘bridge control’ C . whenever the secondary station is switched to ‘bridge control’ D . whenever the engine side control station is switched to ‘bridge control&rsquo

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• Diesel engine exhaust noise can be reduced in an exhaust muffler by （）

  A . changing the direction of exhaust gas flow B . increasing the exhaust gas velocity C . changing the exhaust gas weight D . increasing the exhaust gas static pressure

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• Low compression pressure in a diesel engine can be caused by（）

  A . improperly seating intake valves B . leaking cylinder liner seal rings C . late fuel injection timing D . carbon deposits on the pisto

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• It can be inferred that the writer thinks that engineering curricula are

  A．strengthened when they include courses in design. B．weakened by the courses designed to develop mathematical skills. C．weak because they include some nonscientific components. D．strong despite the absence of nonscientific modes of thinking.

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• A few spots of turbocharger can be caused by ①crash stop of engine; ②rapid increased of engine speed.

  A.① only is correct B.② only is correct C.both ① and ②are correct D.neither ① or ② correct

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