In the piping systems of a vessel，what type of valve gives the least resistance to fluid flow when fully open?（）...

第1题

[单选题] In an auxiliary boiler steam and water system, the highest pressure will be in the （）.

A、steam stop valve B、dry pipe C、feedwater system D、generating tubes

第2题

[单选题] Moisture in a refrigeration system can cause （）.

A、freezing the expansion valve closed B、corrosion of system piping C、improper temperature regulation D、all of the above

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第3题

[单选题] The opening in the deck beneath the anchor windlass that leads to the chain locker is the（）.

A、hawse pipe B、fall pipe C、drop-pipe D、spill pipe

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第4题

[单选题] The opening in the deck beneath the anchor windlass that leads to the chain locker is the（）.

A、Hawse pipe B、Fall pipe C、Drop-pipe D、Spill pipe

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第5题

[单选题] An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.

A、restriction in refrigerant piping B、air and non-condensable gases in the condenser C、water in the refrigerant D、flooding back of liquid refrigerant from the evaporator

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第6题

[单选题] The opening in the deck that leads the anchor cable outside the hull is the（）.

A、hawsepipe B、fall pipe C、drop-pipe D、spill pipe

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第7题

[单选题] The pipe friction and the resistance will （） as a result of an increase in the amount of fluid flowing through the system.

A、reduce B、rise C、raise D、fall

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第8题

[单选题] In order for combustion to occur inside a piping system such as a vapor collection header in a marine emmission control system，there must be（）.

A、fuel B、oxygen C、ignition D、All of the above

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第9题

[单选题] In engines with system, the lubricating oil can be added to the engine through the filling hole in the crankcase cover, by using a hand oil can, or through the separator pipe（）

A、lubricating oil B、dry sump C、circulated tank D、wet sump

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第10题

[单选题] “Any leaks in piping, propeller shaft, machinery, tanks, will have to be repaired, or at least patched up temporarily until the next stop” This sentence means that （）.

A、Any leaks in piping, propeller shaft, machinery, tanks, will have to be repaired on the spot B、Any leaks in piping, propeller shaft, machinery, tanks, will have to be repaired on the next port of call C、Any leaks in piping, propeller shaft, machinery, tanks, will have to be repaired until the next stop D、Any leaks in piping, propeller shaft, machinery, tanks, will have to be at least patched up

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In the piping systems of a vessel，what type of valve gives the least resistance to fluid flow when fully open?（）.

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