A water jacket is placed around the exhaust manifolds of propulsion diesel enginesto

The space between cylinder liner and jacket is called _____.

A.the cooling water

B.the circulating water

C.the cooler

D.the cooling water space

and ___ the sea water passing through the tubes.

A.dispose

B.dissolve

C.heat

D.dissipates

first

A.place standby cooler in operation

B.reduce engine load

C.check thermostatic valve

D.clean sea water strainer

t is determined not to be defective, you would suspect a/an

A.cavitation erosion in the water jackets

B.excess corrosion inhibitor in the coolant

C.dirty jacket water cooler

D.defective turbocharger

w sea suction and the expansion tank water level being normal. Which of the following problems is most likely the cause？

A.Faulty thermostatic bypass valve

B.Eroded zinc pencils in the heat exchanger

C.Steam formation in the expansion tank

D.Excessive leakage from jacket water pump seals

hat it ______．

A.Causes colloid suspension in the cooling water

B.Reduces the capability of the lubrication system

C.Can form pockets which block the flow of coolant through the system

D.Leads to the scuffing of cylinder walls

Two relative cooling water systems are designed for this prupose,respectively（) termed

.

A. fresh water cooling system and sea water system

B. sea water cooling system and lubricating oil cooling system

C. fresh water cooling system and lubricating oil cooling system

D. jacket cooling system and piston cooling system

Piston cooling fins are located

A.atop the piston crown

B.beneath the piston crown

C.at the base of the piston skirt

D.inside the cylinder liner cooling water jacket

ily by

A.heat conduction into the injected fuel oil

B.heat conduction into the water jacket wall

C.water circulation through passages in the holder

D.fuel oil circulation through passages m the holder

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