海船船员考试
单选题The knock occurring when a cold diesel engine is started and continues while running at low speed, but stops when the engine reaches normal operating speed and temperature, is（）.A caused by retarded injection timingB caused by a mechanical defect in on
题目
caused by retarded injection timing
caused by a mechanical defect in one cylinder
caused by high fuel injection pressures
normal for these conditions
相似问题和答案
第1题：
In a diesel engine, late fuel injection is indicated by black or gray exhaust smoke with ______.
A.low firing pressure
B.low exhaust temperature
C.mechanical knock in each cylinder
D.fuel knock in each cylinder
第2题：
a shortened ignition delay period
a lean fuel/air mixture
excess fuel in the combustion chamber
rapid vaporization of injected fuel droplets
第3题：
Combustion knock occurring in a diesel engine can be caused by _____.
A.low coolant temperature
B.insufficient fuel
C.high ambient temperature
D.carbon buildup on the injector tips
第4题：
increasing the quantity of starting air
increasing the lube oil pressure
heating the engine fuel supply
heating the engine coolant
第5题：
Crankshaft revolution
Type of engine (diesel or gasoline)
Distance a piston travels during a stroke
Number of pistons
第6题：
ignition lag
engine horsepower
lube oil system pressure
specific fuel consumption
第7题：
fuel pumps
cylinders
fuel strainers
all of above
第8题：
Cold weather starting of a diesel engine is more difficult than warm weather starting due to
A.use of low viscosity oil in cold weather
B.increased moisture content of inlet air in cold weather
C.increased drag of pistons and bearings due to increased oil viscosity
D.higher compression pressures reached due to smaller clearances existing in the engine during cold weather
第9题：
intake stroke
compression stroke
power stroke
exhaust stroke
第10题：
chromium plating piston rings
knurling the piston skirt
extended maximum power operation
applying load to a cold diesel engine