The diesel engine exhaust gas bypass, as fitted with some wa

A dry-type spark arrestor removes sparks from a diesel engine exhaust by ____.

A.increasing the linear velocity of the exhaust gases

B.changing directions of exhaust gas flow

C.decreasing the temperature of the exhaust gases

D.accelerating the exhaust gas through a reduced size orifice

In an auxiliary diesel engine bypass type lubricating oil system, the main lube oil pump forces_______ .

A.all of the oil used by the engine through a filter

B.some of the oil used by the engine through a filter

C.some of the oil used by the engine through a centrifuge

D.all of the oil used by the engine through a centrifuge

An indication of an overloaded main propulsion diesel engine is( ).

A.white smoke in the exhaust

B.high exhaust gas pyrometer readings

C.sparks in the exhaust

D.blue smoke in the exhaust

The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by_______.

A.large conical springs

B.compressed air pressure

C.hydraulic pressure

D.exhaust gas pressure

A bypass line provided around a waste heat auxiliary boiler in a diesel engine exhaust system, may be used to avoid boiler ______.

A.corrosion at low engine loads

B.erosion at high engine loads

C.overload at high engine loads

D.scaling at all exhaust temperatures

A water jacket is placed around the exhaust manifolds of propulsion diesel enginesto( ).

A.reduce heat radiation to the engine room

B.aid in preventing turbocharger overheating

C.condense and drain moisture from exhaust gases

D.dampen exhaust gas pulsations in the manifold