A.after the thrust power is zero
B.after the torsion is zero
C.surpass the critical point on the water turbo phase
D.after the speed is zero
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A.rapid reduction of ship’s friction force
B.shaft system over mechanical load
C.sharp growth of the torque of diesel engine
D.propeller torque change along J=0 curve
A.reduce the fuel feeding of main engine of inner propeller
B.reduce the fuel feeding of main engine of outer propeller
C.firstly reduce the fuel of main engine of inner propeller, then reduce the fuel feeding of engine of outer propeller
D.reduce fuel feeding of two engines at the same time
A.stop main engine immediately
B.ask the captain and the chief engineer’s permission for stopping the engine
C.initiatively inquire the bridge for the situation
D.stop engine and inform bridge
A.10%
B.15%
C.20%
D.5%
A.cleaning fuel oil, lubricating oil and seawater filter
B.reducing fuel feeding of the main engine appropriately or reducing the pitch angle of propeller
C.using low sea chest
D.closing the skylight and the ventilation opening, which doesn’t affect the normal work of equipments
A.navigating with a low diesel engine speed
B.navigating with a stable diesel engine speed
C.increasing the efficiency of propeller
D.increasing fuel injection
A.prevent the diesel engine surging
B.prevent governor from being damaged because of swing
C.reduce the probability of the crank shaft being torsional vibrated and resonated
D.prevent the main engine being overload or overspeed
A.the power of main engine will be reduced
B.exhaust temperature will be increased
C.the speed of the ship will be reduced
D.the propulsion characteristic of propeller will keep unchanged
A.reduce fuel feeding
B.increase fuel feeding
C.keep original fuel feeding
D.be overspeed
A.overspeed;overload
B.overload;overspeed
C.over torque;overspeed
D.low mechanical efficiency;overload
最新试题
Diesel engine air start system check valves are opened by ()
Under MARPOL Code the ship to which it applies has to carry ()
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to ()
By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a()
Cold weather starting of a diesel engine may be made easier by()
The main purpose of port State control is not to()
The additional mark ()in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.
The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the()
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a()
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?()