Before starting any diesel or gasoline engine, which of the following must be checked?____

Before engaging the turning gear and turning the diesel engine, which of the following operation should be done except______.

A.open the indicator cocks

B.supply some CYL.Oil to cylinder liner wall with lubricator (only for two stoke diesel engine)

C.put the fuel handle in the "stop" position

D.pump up the air bottle

Before starting a gasoline engine on a motorboat，you should make sure for safety that ______．

A.The gasoline tank is full

B.The bilges，cabins，etc．are thoroughly ventilated

C.You have fresh water on board

D.Each of the above is followed

Diesel engine electric starting motors generally require heavier duty motors and motors and operate at higher voltages than comparable starting motors for gasoline engines due to _____________.

A.higher speed required

B.flywheel-effect

C.lower starting temperatures

D.higher compression pressures

In an operating diesel engine, which of the following conditions is an indication of a leaking air starting valve?

A.Noise coming from that air starting valve

B.Continuous operation of the starting air compressor

C.Zero air pressure in the air starting system

D.Overheated starting air pipe to the cylinder head

Which of the following reasons represents why the designed compression ratio of a gasoline engine is lower than that of a diesel engine?

A.compression must be low for effective spark ignition

B.compression must be low for required horsepower and torque generation

C.compression must be low to prevent pre-ignition

D.compression must be low to have effective pre-ignition