海船船员考试
单选题The ignition quality of diesel fuel is indicated by its（）A octane numberB cetane numberC viscosity in Saybolt secondsD air fuel ratio
题目
octane number
cetane number
viscosity in Saybolt seconds
air fuel ratio
参考答案和解析
相似问题和答案
第1题：
The cetane number of a diesel fuel oil indicates its ______.
A.ignition quality
B.acid content
C.heating value
D.viscosity
第2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3题：
Fuel droplets injected into a diesel engine cylinder must have adequate penetration to ____.
A.prolong the ignition delay period
B.ensure the beginning of fuel injection
C.thoroughly utilize the air charge
D.allow controlled fuel combustion
第4题：
vacuum pressure
specific gravity
heat
viscosity
第5题：
cetane number
octane number
ignition index number
volatility point
第6题：
The cetane number of a diesel fuel oil indicates its ______.
A.viscosity
B.acid content
C.heating value
D.ignition quality
第7题：
What quality of a diesel fuel is most significant for efficient combustion ________．
A.Volatility
B.Viscosity
C.Flash point
D.Specific heat
第8题：
Crankcase explosions in propulsion diesel engines result from ____.
A.the splashing of lubrication oil by the crankshaft
B.the dilution of crankcase oil with particles of combustion
C.broken fuel lines spraying oil on the crankcase
D.the ignition of unburned fuel and air in the crankcase
第9题：
flash point
auto-ignition point
volatility point
upper explosive limit
第10题：
excessively late fuel injection
oil in the air charge
water in the fuel
injection continuing after the fuel charge is ignited