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

A . reduce mean effective pressure B . decrease average compression pressure C . decrease air charge density D . increase power output

A . conducted through the engine block B . conducted to water cooled cylinder walls C . conducted through the piston crown D . loss to escaping exhaust gase

A . 60 to75 B . 80 to 95 C . 100 to 115 D . 120 to 135

A . a dirty lube oil strainer B . internal water leaks C . an oil suction line restriction D . excessive wears of the cooling water pum

A . slightly acidic condition B . slightly alkaline condition C . overtreatment of water D . neutral condition of water

A . radiated through the engine block B . transferred to water cooled cylinder walls C . conducted through the piston crown D . transferred to escaping exhaust gase

A . alkale scence B . acidity C . salinity D . impurity

A . cylinder covers B . lubricating space C . crosshead D . exhaust manifold

A . high oil pressure B . excessive bearing end play C . plugged oil control rings D . engine overload

A . heat conduction into the injected fuel oil B . heat conduction into the water jacket wall C . water circulation through passages in the holder D . fuel oil circulation through passages in the holder

A . low compression pressure B . increased piston wear C . increased cylinder lube oil consumption D . poor contact between compression rings and liner

A . raw water pump discharge B . expansion tank outlet C . cooling water heat exchanger D . outlet engine jacket water outlet

A . reduce lube oil temperature B . raise exhaust temperature reduce C . excessive heating of engine room D . reduce load on cooling water pum

A . cylinder heads B . exhaust valves C . scavenging air D . injector

A . slight acidity B . slight alkalinity C . excessive alkalinity D . excessive acidity

A . regulating the level of corrosion inhibitor in the primary cooling system B . the level of the freshwater expansion tank C . varying the engine load to meet temperature requirements D . the operation of the thermostatic valve

A . Except for B . Beside C . Except D . In addition to

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 . maintain low pH in the cooling water B . reduce the cooling water temperature C . increase cooling water hardness D . form a protective film on metal surface

A . cylinders B . exhaust valves C . pistons D . fuel valve

A . sea water B . fine mineral oil C . sanitary water D . fresh water

A . Each engine must have its own engine driven cooling water pump capable of providing cooling for all ranges of operation B . propulsion engines with bores exceeding 200 mm are to be fitted with a means to display the cooling water temperature of each cylinder C . At least two independent sea suctions are to be provided for supplying water to the engine jackets or to the heat exchangers D . Suitable strain are to be fitted between the circulating pumps and heat exchangers when sea water is used for direct cooling

A . Ⅰ+Ⅱ B . Ⅱ+Ⅲ C . Ⅲ+Ⅳ D . Ⅰ+Ⅳ

A . higher torque but lower brake horsepower B . lower torque but higher brake horsepower C . higher torque and lower brake horsepower D . lower torque and higher brake horsepower