In a diesel engine lube oil system, which of the following parts should be lubricated first?（）

单项选择题Before starting a diesel engine that has an engine driven lube oil pump, the engineer should （）.

A.open the bypass line
B.cut in the lube oil cooler
C.pressurize the lube oil system
D.top off the expansion tank

单项选择题The small end of the connecting rod is attached to the piston with a （）.

A.crankpin
B.sliding wedge
C.wrist pin
D.torque bashing

单项选择题Increasing the load on an engine equipped with a constant speed mechanical governor, will cause the engine speed to initially （）.

A.increase
B.decrease
C.fluctuate
D.remain constant

单项选择题A dirty diesel engine oil filter element can best be detected by （）.

A.visual inspection of the elements
B.the pressure drop across the filter
C.high lube oil sump temperature
D.decrease in oil viscosity from the filter

单项选择题In an auxiliary boiler steam and water system, the highest pressure will be in the （）.

A.steam stop valve
B.dry pipe
C.feedwater system
D.generating tubes