A.a fire -tube boiler
B.an internal combustion engine
C.an external combustion engine
D.an internal combustion generator
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A.the bearing clearances
B.the bearing thickness
C.the bearing strength
D.the bridge hardness
A.on top cover
B.on sides of bowl
C.in drain line on the discs
D.on the discs
A.low specific heat
B.high specific heat
C.corrosive action
D.high viscosity
A.low specific heat
B.corrosive action
C.high expense
D.acid property
A.injecting fuel oil into a cylinder
B.removing exhaust gases from the cylinder
C.forcing air into the cylinders under pressure after the exhaust valve has dosed
D.a combination of all the above
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In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.
When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.
Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.
For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.
Routine monitoring of a diesel engine should include （）.
A diesel engine piston ring face is in direct contact with the （）.
The minimum speed an engine must attain before ignition can occur depends upon （）.
Control of the main propulsion diesel engines can be shifted from the engine room to the wheelhouse from the （）.
Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.
Engine protection by means of an alarm or shutdown control can be obtained with devices that are sensitive to （）.