Before starting any diesel or gasoline engine，which of the f

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

Your vessel has a gasoline engine and a mechanical exhaust ventilation system．BEFORE starting the engine，the exhaust blower should be run long enough to ______．

A.warm up the exhaust blower motor

B.provide a proper supply of fresh air for the engine（s）

C.see the system is in good operating condition

D.insure at least one complete change of air in the compartments concerned

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

If you are unable to stop a diesel engine by any other means，you should ______．

A.Discharge a CO2 extinguisher in the air inlet

B.Pull off the distributor cap

C.Secure the jacket water

D.Secure the starting air supply valve

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

A.Oil level

B.Flow of cooling water

C.Exhaust discharge

D.All of the above

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