单项选择题
A.030 to 1 B.300 to 1 C.333 to 1 D.330 to 1
High diesel engine cooling water temperatures can be ca...
单项选择题High diesel engine cooling water temperatures can be caused by （）.
A.air in the cooling system B.an overhauled water pump C.correct amount of coolant D.no air in the cooling system
The rotary motion of a diesel engine crankshaft is obta...
单项选择题The rotary motion of a diesel engine crankshaft is obtained from the up and down motion of the piston via the （）.
A.camshaft B.reduction gears C.rocker arm D.connecting or piston rod
A.a worn water pump B.not enough coolant C.air in the cooling system D.all of the above
