A.starting the engine hot
B.knurling the piston skirt
C.operating an overheated engine
D.using scuff resistant piston rings
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A.the amount of lube oil additives increase
B.piston speeds increase
C.injection pressure decrease
D.engine speeds decrease
A.less piston slap and quieter running
B.increased crankshaft bearing wear
C.slightly greater piston wear
D.decreased side pressures
A.Liner wear is distributed equally between the upper and lower portions of the cylinder
B.Excessive liner wear causes wear between piston ring and groove
C.Excessive, but uniform liner wear will not cause wear between piston ring and groove
D.Liner wear is normally greatest in the middle of the cylinder
A.alternation of side thrust
B.a breakdown of the lube oil film on the cylinder wall
C.worn piston boss piston pin bearings
D.fluctuating gas pressure in the combustion space
A.hard starting
B.excessive fuel consumption
C.loss of power
D.all of the above
最新試題
To proceed to the assistance of a ship in distress is（）
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（）
Using a file without a handle may result in （）
The treatment of the fuel oils involves storage, heating, filtering and（）
The shipboard oil pollution emergency plan will be invalid after （）
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
If separating effect is not good, which measure should be taken （）
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（）