单项选择题

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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单项选择题
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
单项选择题
The principal difference between loop scavenging and crossflow scavenging, as used in single acting diesel engines, is the （）

A.direction of air flow within the cylinder
B.sequence of port opening
C.method of opening exhaust ports
D.volume of air admitted to the cylinder
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