Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.

单项选择题Diesel engine control can be obtained by the bridge （）.

A.at any time
B.only after the engine room control station is switched to “bridge control”
C.whenever the secondary station is switched to "bridge control"
D.with the approval of the chief engineer only

单项选择题To determine if the lube oil filter elements need changing, （）.

A.open the filter and inspect the elements
B.check the lube oil pump discharge pressure
C.check the lube oil header pressure
D.check the pressure drop across the filter

单项选择题Which of the two events listed occurs simultaneously in a two-stroke cycle diesel engine?（）

A.Exhaust and scavenging
B.Scavenging and compression
C.Ignition and expansion
D.Exhaust and compression

单项选择题To successfully reduce an excessively high diesel engine exhaust gas temperature, you should （）.

A.reduce the engine driven fuel pump outlet pressure
B.retard the fuel injector timing to reduce power
C.increase the fuel rack setting
D.reduce the load on the engine

单项选择题A diesel engine with a combustion chamber located between the crowns of two pistons is known as a an （）.

A.double-acting engine
B.opposed pistons engine
C.single-acting engine
D.horizontal acting engine