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

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

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

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

A . through bolts B . turbo-chargers C . bed plates D . colum

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.

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