海船船员考试
单选题For optimum results, centrifugal purification of heavy fuel oil should be accomplished with the fuel at the lowest practicable（）A throughputB additive percentC cetane numberD TBN number
题目
throughput
additive percent
cetane number
TBN number
相似问题和答案
第1题：
Which product is volatile ________．
A.Benzene
B.Diesel fuel
C.Coal tar
D.Heavy industrial fuel oil
第2题：
Glazing of the cylinder liners
Increase valve wear
Excessive oil pumping
Increase fuel consumption
第3题：
Which factor determines the ring dam size for a fuel oil, tubular bowl type, centrifugal purifier?
A.The viscosity of the fuel.
B.The quantity of water to be removed from the fuel.
C.The specific gravity of the fuel.
D.The quantity of dirt to be removed from the fuel.
第4题：
centrifugal force rotates the ball-head
flyweight centrifugal force is balanced by spring force
flyweight centrifugal force is balanced by hydraulic pressure
speeder spring alone actuates the fuel control rod
第5题：
(1) only is correct
(2) only is correct
both (1) and (2) are correct
neither (1) or (2) are correct
第6题：
What causes cavitation in a centrifugal pump ________．
A.Vapor pockets in the flow stream
B.Rough impeller surfaces
C.Worn wearing rings
D.Heavy fluid in the flow stream
第7题：
reduce fuel weight
increase specific gravity
separate fuel from lube oil
reduce fuel viscosity
第8题：
Injectors for use with heavy fuel oil must be cooled by either water or light oil to_____.
A.prevent heat corrosion to internal components
B.increase fuel delivery rate and economy
C.prevent pre-ignition
D.avoid carbonization of the nozzle tips
第9题：
regulate the fuel supply
maintain a constant fuel viscosity at the fuel valves
maintain efficient cooling
alter the fuel density
第10题：
bilge tank
sludge tank
overflow tank
oil collecting tank