What is head tank in the closed cooling water system used for?（）

A、for the release of air from the cooling water

B、providing expansion room for heated cooling water

C、a place for implementing water and water treatment agent

D、all of the above

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更多“What is head tank in the closed cooling water system used for?（）”相关的问题

第1题

[单选题] The piston cooling system may employ similar components, except that a drain tank is used instead of a head tank That means this system （）.

A、doesnt use a drain tank but a head tank B、uses a drain tank not head tank C、uses a drain tank and a head tank D、uses neither a drain tank nor a head tank

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第2题

[单选题] （） allows for expansion and water make up in the water cooling system.

A、A top tank B、A head tank C、A head valve D、A drain tank

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第3题

[单选题] There is （） in any water cooling system for a diesel engine allowing for expansion and water make-up in the system as well as air vent and chemicals addition.

A、a setting tank B、a service tank C、a head tank D、an expansion joint

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第4题

[单选题] 沥青用于污水舱和尖舱。（）

A、Bitumen is used in bilges and peak tanks. B、Paint is used in bilges and peak tanks. C、Bitumen is used in bilges and double bottom tanks D、. Varnish is used in bilges and peak tanks.

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第5题

[单选题] What is the purpose of pressure-vacuum relief valves? （）

A、Regulation of discharge pressure from cargo pumps B、Maintaining constant velocity in cargo lines C、Regulation of suction head on cargo pumps D、To maintain a tank or void at atmospheric pressure

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第6题

[] In a commonly used fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to （） and heated.

A、A.a service tank B、B.a settling tank C、C.an expansion tank D、D.a double bottom tank

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第7题

[单选题] Fire protection regulations for towing vessels require any fuel line subject to internal head pressure from fuel in the tank to（）.

A、be fitted with a positive fuel shut-off valve located at the tank B、have a shut-off valve at the top of the tank C、have a gate valve easily accessible in the space where the tank is located D、have a drain cock at the lowest point in the fuel line

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第8题

[单选题] Your vessel is listing 4° to port and has a short rolling period. There is loose firefighting water in the hull. The ship is trimmed down by the head with one foot of freeboard at the bow. Which action should you take FIRST?（）

A、Press up the slack NO.1 starboard double bottom tank B、Pump out the forepeak tank C、Eliminate the water in the 'tween decks aft

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第9题

[单选题] In a typical fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to （） and heated.

A、a service tank B、a collecting tank C、a sump D、a settling tank

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