单项选择题
A.maximum power at a normal load
B.maximum power and load under normal conditions
C.half speed and normal temperature
D.normal operating temperature without a load
单项选择题 To guarantee that a reduction gear bearing is receiving proper oil supply, you should check the （）
单项选择题 In a jerk pump, the amount of fuel that will be forced through the spray nozzle on each upward stroke of the plunger depends on （）
单项选择题 If the jacket water temperature in an auxiliary diesel engine cooling system is lower than normal, the probable cause is （）