单项选择题

Camshafts are usually driven by timing gears or （）.

A.push rods
B.chain drives
C.rocker arms
D.flywheels

相关考题

A waste heat boiler is installed on some diesel propell...

单项选择题A waste heat boiler is installed on some diesel propelled vessels to （）.

A.provide steam for emergency propulsion
B.provide steam for the turbo-generator
C.heat the waste water tanks
D.steam for warming engines

What is the speed of the crankshaft in a four-stroke/cy...

单项选择题What is the speed of the crankshaft in a four-stroke/cycle engine when the camshaft is turning at 750 rpm?（）

A.375 RPM
B.500 RPM
C.750 RPM
D.1500 RPM

An electric heater built into some smaller diesel engin...

单项选择题An electric heater built into some smaller diesel engines is used to （）.

A.raise lube oil viscosity for easier starting in cold weather
B.increase air inlet temperature
C.increase compression ratio
D.increase jacket water temperature for easier starting in cold weather

船舶动力装置

Camshafts are usually driven by timing gears or （）.