题目内容

The primary function of a waste heat boiler is to( )

A. reduce engine exhaust noise
B. reduce engine back pressure
C. recover heat which otherwise would be lost
D. increase turbocharger efficiency

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Common rail fuel systems call for( ) filtration regimes, typically dictating 5 microns filtration to protect injection components from extensive wear.

A. lax
B. coarse
C. more lax
D. stricter

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The( ) cooling system needs least maintenance work for( ) in this kind of system.

A. Open; the minimum components
B. Open; the high cooling efficiency
Central ; there are more coolers and a extra set of pumps
D. Central ; there is only one component contacts seawater

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In the engine system, heat exchanger tubes are frequently attacked by sea water because of ( ) within the tubes causing pitting and eventual leakage.

A. hitting
B. circulating
C. locking
D. turbulence

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The cylinder jacket cooling water after leaving the engine passes to a sea water circulating cooler,( ) and then into the jacket water circulating pumps.

A. condenser
B. evaporator
C. separator
D. heat exchanger

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The primary function of a waste heat boiler is to( )

A. reduce engine exhaust noise B. reduce engine back pressure C. recover heat which otherwise would be lost D. increase turbocharger efficiency

Common rail fuel systems call for( ) filtration regimes, typically dictating 5 microns filtration to protect injection components from extensive wear.

The( ) cooling system needs least maintenance work for( ) in this kind of system.

In the engine system, heat exchanger tubes are frequently attacked by sea water because of ( ) within the tubes causing pitting and eventual leakage.

The cylinder jacket cooling water after leaving the engine passes to a sea water circulating cooler,( ) and then into the jacket water circulating pumps.

A. reduce engine exhaust noise
B. reduce engine back pressure
C. recover heat which otherwise would be lost
D. increase turbocharger efficiency