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If a diesel engine were running at 20% overload with a smoky exhaust, you should（）

A.stop the engine immediately to prevent damage
B.increase lube oil pressure
C.slow the engine allowing it to gradually cool
D.decrease the cooling water it temperature to the water jacket

單項選擇題

Air bubbles in a hydraulic governor can cause （）

A.sluggish response
B.speed droop variations
C.isochronous governing
D.sensitivity increase

單項選擇題

In a turbocharged four-stroke/cycle diesel engine, the exhaust valve remains open until after top dead center and the intake valve opens before top dead center to（）.

A.produce a scavenging effect in the combustion space
B.equalize cylinder and exhaust manifold pressures
C.alleviate the difference in valve size between the intake and exhaust
D.flush out condensate that collects after each compression stroke

單項選擇題

In a pneumatic automation system, a unit producing a signal to govern the position of the controller of the measured variable, relative to the value of the measured variable, is said to have（）.

A.reset action
B.proportional action
C.two position action
D.rate action

單項選擇題

Before marine sewage treatment plant works （） should be filled with fresh water.

A.deposition chamber
B.oxidation pool
C.disinfection chamber
D.all chamber

單項選擇題

Which of the listed classes of fire is considered as one involving electrical equipment?（）

A.Class "A"
B.Class "B"
C.Class "C"
D.Class "D"

單項選擇題

The minimum fuel oil delivery pressure required for diesel engine injection depends primarily on the（）

A.degree of cylinder air turbulence
B.firing pressure in the engine
C.quality of fuel to be injected
D.duration of the ignition delay period

單項選擇題

The size of the exhaust valve opening is （）

A.most critical in a four-stroke cycle diesel engine
B.most critical in a two-stroke/cycle diesel engine
C.most critical in a four-stroke/cycle diesel engine if it is turbocharged
D.of equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cycle diesel engine

單項選擇題

The process of scavenging a two-stroke/cycle diesel engine serves to（）

A.improve fuel flow volume
B.cool the exhaust valves
C.reduce the intake air charge density
D.increase the temperature of exhaust gases

單項選擇題

Self-excited a-cgenerator with "error operated" voltage control systems draw the full excitation power for the machine terminalsThis dispenses with the current transformers, reactors and capacitors necessary for accurate compounding, but renders the excitation system vulnerable to variations in its output voltageWhich of the following is correct about the generator mentioned according to the sentences above （）.

A.It consumes no excitation power
B.It has current transformers
C.Components are needed for accurate compounding
D.Its excitation system is vulnerable to voltage variations

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輪機英語船舶電氣與船舶安全章節(jié)練習(xí)(2019.04.30)

If a diesel engine were running at 20% overload with a smoky exhaust, you should（）

Air bubbles in a hydraulic governor can cause （）

In a turbocharged four-stroke/cycle diesel engine, the exhaust valve remains open until after top dead center and the intake valve opens before top dead center to（）.

In a pneumatic automation system, a unit producing a signal to govern the position of the controller of the measured variable, relative to the value of the measured variable, is said to have（）.

Before marine sewage treatment plant works （） should be filled with fresh water.

Which of the listed classes of fire is considered as one involving electrical equipment?（）

The minimum fuel oil delivery pressure required for diesel engine injection depends primarily on the（）

The size of the exhaust valve opening is （）

The process of scavenging a two-stroke/cycle diesel engine serves to（）