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Failure of the burner flame in an auxiliary boiler would probably be a result of .A.water

Failure of the burner flame in an auxiliary boiler would probably be a result of .

A.water in the fuel oil

B.broken high tension leads

C.incorrect electrode setting

D.full fuel pressure at the nozzle

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第1题

Which of the following problems will occur if the internal drain at either end of a hydraulic, two-way, spool-type directional control valve cylinder were to become plugged?

A.The reservoir would become vapor bound

B.The valve would be placed in hydraulic lock

C.The spring loaded relief ports would open

D.The buffering chambers would be unable to function

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第2题

Which of the following condition is likely to develop if the thermocouple element of a pyrometer becomes coated with excessive amounts of combustion by-products?

A.Indicated exhaust pressure readings will increase

B.Pyrometer responses will be retarded

C.Indicated cylinder temperature readings will increase

D.Indicated firing pressure readings will increase

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第3题

The heavy-duty lubricating oil with chemical has been widely introduced in recent years.

A.additives

B.behavior.

C.coolant

D.desiccant

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第4题

Excessive lube oil consumption can result from worn or broken ______________.

A.piston rings

B.valve guides

C.valve seals

D.all of the above

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