A.the good sealing performance and the simple structure
B.the good sealing performance and the short life expectancy
C.the good sealing performance but the short life expectancy
D.the good sealing performance and the lower cost
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A.the shafting’s vertical vibration
B.violent friction and sea water corrosive
C.friction and high temperature
D.violent friction and high temperature
A.the border flange’s excursion and flection
B.the both end shafts line’s accordance
C.the border flange’s flection and the both end shafts line’s accordance
D.the border flange’s accordance and both end shafts flection degree
A.the stopping engine suddenly
B.the sailing astern and changing direction suddenly
C.the sailing from the shallow water area to the deep water area
D.the ship’s trim too much
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
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
最新試題
Which of the following items don’t belong to dock repair works?（）
Flame failure in an automatically fired auxiliary boiler can from a/an （）
Cold weather starting of a diesel engine may be made easier by（）
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
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 main purpose of port State control is not to（）
To proceed to the assistance of a ship in distress is（）
Using a file without a handle may result in （）