题目内容

A centrifugal pump may fail to deliver water when first started if the ______.

A. water seal pipe is plugged
B. pump is not primed
C. seal ring is properly located
D. impeller is flooded

查看答案

搜索结果不匹配？点我反馈

更多问题

The major cause of trouble in a mechanical-hydraulic governor is contamination of the hydraulic fluid by ______.

A. dirt
B. fuel oil
C. governor cooling water
D. fuel oil tar(焦油)

查看答案

Cooling of engines is achieved by circulating a cooling liquid around internal ______within the engine.

A. air
B. passages
C. pipes
D. means

查看答案

In a diesel engine, when refitting piston rings you should______. I. check the ring gap at

A. I only
B. II only
C. both I and II
D. neither I nor II

查看答案

Fuel has been injected but ignition fails. The possible cause may be ______.

A. slightly leaky exhaust valve
B. increased scavenging air temperature
C. engine cylinders not scavenged sufficiently
D. too much water in the fuel oil

查看答案

A centrifugal pump may fail to deliver water when first started if the ______.

A. water seal pipe is plugged B. pump is not primed C. seal ring is properly located D. impeller is flooded

The major cause of trouble in a mechanical-hydraulic governor is contamination of the hydraulic fluid by ______.

Cooling of engines is achieved by circulating a cooling liquid around internal ______within the engine.

In a diesel engine, when refitting piston rings you should______. I. check the ring gap at

Fuel has been injected but ignition fails. The possible cause may be ______.

A. water seal pipe is plugged
B. pump is not primed
C. seal ring is properly located
D. impeller is flooded