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【单选题】

The intake ports of a two-strike/cycle diesel engine are opened and closed by the action of the （）

A、camshaft

B、piston movement

C、exhaust valves

D、vertical drive

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更多“The intake ports of a two-strike/cycle diesel engine are opened and closed by the action of the （）”相关的问题

第1题

[单选题] In comparison to exhaust valves, intake valves of diesel engines may be fabricated from low alloy steels because （）.

A、the beveled edges of the intake valves provide for serf-centering during seating B、intake valves utilize stellite-coated valve seat inserts which reduce wear C、the volume of air passing through intake valves is less than the volume of air passing through exhaust valves D、intake valves are less affected to the corrosive action of exhaust gases

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第2题

[单选题] The present voyage of my ship began at the port of Shanghai after loading 8000 tons of cargo on board and ended after discharging the cargo at the port of Hong Kong, which is（）.

A、the port of destination B、the next port of call C、the port of arrival D、the last port of call

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第3题

[单选题] The present voyage of my ship began at the port of Shanghai after loading 8 000 tons of Cargo on board and ended after discharging the Cargo at the port of Hong Kong，which was（）.

A、the port of destination B、the next port of call C、the port of arrival D、the last port of call

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第4题

[单选题] Scavenging in a four-stroke/cycle diesel engine occurs during the （）.

A、last part of the exhaust stroke, and the first part of the intake stroke B、last part of the intake stroke only C、early part of the injection stroke only D、early part of the power stroke

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第5题

[单选题] Performance of a turbocharged engine can be improved by（）

A、decreasing the amount of valve overlap B、preheating the air intake C、after-cooling the intake air D、preheating light fuel

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第6题

[单选题] Directional intake ports in diesel engines are used to （）.

A、reduce air charge turbulence B、induce air swirl C、deflect hot combustion gas away from the valves D、oppose the effects of piston induced squish

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第7题

[单选题] The port in which crew or passengers go on board the ship is called（）.

A、port of call B、port of embarkation C、port of destination D、port of disembarkation

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第8题

[单选题] Prior to each voyage the master of every ship shall ensure that the intended route from the port of departure to（）is planned using adequate and appropriate charts and other nautical publications necessary for the intended voyage.

A、the first port of call B、any port of call C、the last port of call D、the destination

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第9题

[单选题] 船舶左舷的艉部叫左艉舷。（）

A、The forward part of a vessel on the starboard side is called starboard quarter. B、The aft part of a vessel on the starboard side is called port quarter. C、The aft part of a vessel on the port side is called port quarter. D、The forward part of a vessel on the port side is called port quarter.

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