单项选择题
A.for starting diesel engines B.in pneumatic control system C.in pneumatic tools D.All the above are true
Compressed air is supplied by air compression to （）.A.t...
单项选择题Compressed air is supplied by air compression to （）.
A.the air receivers B.the starting valves C.the cylinder covers D.the distributors
Charging-air pressure increases if there is incorrect c...
单项选择题Charging-air pressure increases if there is incorrect combustion and drop in the （） of the diesel engine.
A.machine efficiency B.machinery efficiency C.mechanical efficiency D.mechanics efficiency
Charging is the filling of the engine cylinder with a s...
单项选择题Charging is the filling of the engine cylinder with a supply or charge of fresh air （） compression.
A.to need B.ready for C.want to D.going to be
