0pen ullage holes in tanks which are not gas-free must be protected by（）.

A、PV valves

B、warning signs

C、flame screens

D、stop-check valves

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更多“0pen ullage holes in tanks which are not gas-free must be protected by（）.”相关的问题

第1题

[单选题] Ullage measurements are taken from the top of the liquid to（）.

A、the base of the expansion trunk B、the base of the ullage port C、a line scribed within the ullage port D、an above-deck datum，usually the top of the ullage hole

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第2题

[单选题] Open ullage holes in tanks which are not gas-free must be protected by（）.

A、PV valves B、warning signs C、flame screens D、stop-check valves

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第3题

[单选题] What is a cofferdam（）.

A、Tube fitted to an ullage hole B、Area the product is loaded into C、Void or empty space separating two tanks D、Opening in the deck used for cleaning a tank

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第4题

[单选题] The object of plugging holes below the waterline on a ship should be to（）.

A、eliminate all water entering the hole B、only plug holes in machinery or other vital spaces C、reduce the entry of water as much as possible D、plug the largest holes first

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第5题

[单选题] The greatest effect on stability occurs from loose liquids flowing（）.

A、from side to side in the tanks of the vessel B、from fore to aft in the tanks of a vessel C、in and out of a vessel that is holed in a wing tank D、in and out of a vessel that is holed in a peak tank

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第6题

[单选题] The tool used in precision work to smooth or enlarge a slightly undersized hole, is called（）

A、round out B、round file C、reamer D、hole driller

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第7题

[单选题] Litmus paste is used in order to determine（）.

A、innage B、thievage C、ullage D、the tank's datum point

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第8题

[单选题] Litmus paste is used in order to determine（）.

A、innage B、thievage C、ullage D、the tank's datum point