A.prevent soot fires in the exhaust system
B.prevent exhaust gas erosion of the tubes
C.increase the velocity of exhaust gas flow
D.increase the rate of heat transfer
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A.a spindle lubricator
B.an oil jet
C.internal splashing
D.drilled passages in the crankshaft
A.the same, whether at sea, or during maneuvering
B.adjusted during each hour of operation while at constant RPM
C.higher at sea than while maneuvering
D.lower at sea than while maneuvering
A.improve fuel economy
B.increase the air charge velocity
C.reduce the risk of explosion
D.all of the above
A.Increased suction head pressure
B.Decreased feedwater temperature
C.Pump recirculating line being open too much
D.Excessive feedwater temperature
A.The safety valve escape piping should be disconnected from the valve body and a blank inserted
B.The boiler vent valves should be opened
C.All handhole/manhole covers should be tightened up as much as possible to preclude any leaks
D.All of the above
最新試題
White smoke exhausting from an operating diesel engine may indicate （）.
A thrust bearing is used with a propulsion diesel engine to （）.
To determine if the lube oil filter elements need changing, （）.
What is the function of the thrust bearing?（）
When would the available energy of the exhaust gases of a two-stroke/cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion?（）
Control of the main propulsion diesel engines can be shifted from the engine room to the wheelhouse from the （）.
What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）
Lube oil filters remove contaminants more efficiently if the oil being filtered is （）.
In a simple mechanical governor, the （）.
How many power strokes per crankshaft revolution are there in an eight cylinder, two stroke/cycle diesel engine?（）