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
更多“Diesel engine mufflers accomplish noise reduction by （）”相关的问题
A、provide exhaust back pressure B、prevent exhaust smoke emissions C、power a reciprocating supercharger D、muffle exhaust gas noise
A、Diesel engines have more advantages in comparison with gasoline engines B、Diesel engines have more advantages in comparison to gasoline engines C、Gasoline engines have more advantages in comparison with diesel engines D、Gasoline engines have more advantages in comparison to diesel engines
A、most critical in a four-stroke cycle diesel engine B、most critical in a two-stroke/cycle diesel engine C、most critical in a four-stroke/cycle diesel engine if it is turbocharged D、of equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cycle diesel engine
A、bearing pressure in a four-stroke\cycle acting single diesel engine is continually reversed B、bearing pressure in a two-stroke\cycle single acting diesel engine is continually reversed C、the maximum bearing pressure is higher in a single acting two-stroke/cycle diesel engine D、two-stoke/cycle diesel engines require more complicated lubrication piping
A、inboard diesel engine B、outboard diesel engine C、outboard gasoline engine D、inboard gasoline engine
A、Slow speed diesel engines B、Medium-speed diesel engines C、Steam engines D、Gasoline engines
A、ignition lag B、engine horsepower C、lube oil system pressure D、specific fuel consumption
A、one half crankshaft speed in a two-stroke cycle diesel engine B、crankshaft speed in a two-stroke cycle diesel engine C、two times crankshaft speed in a two-stroke cycle diesel engine D、one-fourth times crankshaft speed in a four-stroke cycle diesel engine
A、A.Diesel engine propulsion B、B.Diesel electric propulsion C、C.Steam engine propulsion D、D.Gas turbine propulsion
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