单选

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

试题出自试卷《海船船员考试轮机部三管轮模拟题5(轮机英语)》

参考答案

查看试卷详情

相关试题

The stability of a vessel is normally the greatest when all fuel and water tanks are full because the _____.
- A.center of gravity is lowered
- B.center of buoyancy is lowered
- C.reserve buoyancy is unchanged
- D.hull freeboard is increased
点击查看答案
Which of the listed problems would be indicated by an accumulation of water in one cylinder, in addition to the crankcase of an idle diesel engine?
- A.Excessive cylinder liner
- B.water in the fuel system
- C.Cracked cylinder liner
- D.Leaking lube oil cooler
点击查看答案
When turning the engine with turning gear, you should keep the indicator cocks _____.
- A.attached to the indicators
- B.opened
- C.closed
- D.broken
点击查看答案
During compressors running the accumulated moisture in the separators must be _____.
- A.drained off
- B.collected
- C.sent to the crankcases
- D.separated with oil
点击查看答案
The propeller is pushed on to the tubeshaft taper and made tight by _____.
- A.a mechanical seal
- B.keyway and key
- C.a nut
- D.shrinkage
点击查看答案
An oil in water monitor is required in order to measure _____.
- A.the oil content in water
- B.the water content in fuel oil
- C.the water level in bilge well
- D.the oil level in bilge well
点击查看答案
After received the “finished with engine” instruction, which of the following operations is false?
- A.shut off the starting air receiver outlet valve
- B.stop the F.O priming transfer pump and shut off the correspondence inlet and outlet valve
- C.stop the S.W pump immediately and shut off the correspondence inlet and outlet valve
- D.stop the F.W pump immediately and shut off the correspondence inlet and outlet valve
点击查看答案
The sludge tank installed in the diesel engine room is used to collect_______Isludge from the fuel oil settling tanks ad centrifuge IIwater that has been collected in the settling tank
- A.I only
- B.II only
- C.both I and II
- D.neither I or II
点击查看答案
Whether using a centrifuge or a simple filter, oil cleaning and filtration will be the most effective when the oil is at a _____.
- A.high temperature and a high viscosity
- B.high temperature and a low viscosity
- C.low temperature and a high viscosity
- D.low temperature and a low viscosity
点击查看答案
The actual rudder angle reading is .
- A.the rudder angle indicator reading
- B.the desired rudder angle reading
- C.the measured rudder angle reading
- D.the intended rudder angle reading
点击查看答案