单项选择题
A.reducing exhaust gas velocity B.increasing the frequency of gas vibration C.the use of long head pipes D.the use of zinc electrodes
An indication of an overloaded main propulsion diesel e...
单项选择题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 most practical way of detecting an overload in one ...
单项选择题The most practical way of detecting an overload in one cylinder of an operating large, low-speed ,main propulsion diesel engine is to （）
A.check the cylinder exhausts for black smoke B.listen for combustion knock in that cylinder C.isolate each cylinder and inspect the injector D.check the cylinder exhaust temperature frequently
Diesel engine mufflers or silencers reduce the engine e...
单项选择题Diesel engine mufflers or silencers reduce the engine exhaust noise by （）
A.passing the exhaust through long head pipes B.diffusing exhaust vibrations through activated carbon baffles C.increasing the exhaust gas velocity D.reducing the exhaust gas velocity
