Seamless mild steel is used for steam (also copper for moderate pressure and temperature), h-pair, feed discharge and all oil fuel pressure pipingsAccording to the above sentence, which of the following statements is not true?（）

A、A.Both seamless mild steel and copper may be used for middle pressure steam

B、B."hpair" means high pressure air

C、C.The feed piping of the boilers can be made of seamless mild steel

D、D.All oil pipings are made of mild steel

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更多“Seamless mild steel is used for steam (also copper for moderate pressure and temperature), h-pair, feed discharge and all oil fuel pressure pipingsAccording to the above sentence, which of the following statements is not true?（）”相关的问题

第1题

[单选题] Rivets are usually made of（）.

A、wrought-iron B、aluminum C、high-tensile steel D、mild steel

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第2题

[单选题] Most propellers on merchant vessels are constructed of（）.

A、managanese bronze B、cast iron C、mild steel D、improved plow steel

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第3题

[单选题] Cast iron and gunmetal fittings are used freely in small sizes at moderate pressure; large fittings, those for high pressure and temperature are cast or mild steelIn the above sentence, the word “those” means （）.

A、east iron firings B、mild steel fittings C、small fittings D、large fittings

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第4题

[单选题] With reference to a vessel’s structural integrity, the most significant characteristic of a cryogenic liquid is its （）.

A、capability of causing brittle fractures B、highly corrosive action on mild steel C、vapor cloud which reacts violently with saltwater D、toxicity at atmospheric pressure

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第5题

[] Connecting elements of a mooring system should be fabricated from（）.

A、A.cast iron B、B.forged steel C、C.stainless steel D、D.cast steel

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第6题

[单选题] The main bearings are provided with thin-walled （）, lined with a copper-lead alloy.

A、steel guides B、steel shells C、steel bearing caps D、pig iron

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第7题

[单选题] （） pistons have low inertia and high coefficient of thermal expansion.

A、Cast iron B、Cast steel C、Forged steel D、Aluminum