單項(xiàng)選擇題

Which vessel is NOT to be regarded as restricted in her ability to maneuver?（）.

A.A vessel transferring provisions while underway
B.A pushing vessel and a vessel being pushed when connected in a composite unit
C.A vessel servicing a navigation mark
D.A vessel launching aircraft

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單項(xiàng)選擇題

Which types of portable fire extinguishers are designed for use on electrical fires?（）

A.Dry chemical and carbon dioxide
B.Foam (stored pressure) and soda-acid
C.Carbon dioxide and foam (stored pressure)
D.Dry chemical and soda-acid

單項(xiàng)選擇題

Which statement about immersion suits is TRUE?（）

A.The primary color of the suit's exterior may be red，orange or yellow
B.The suit must，without assistance，turn an unconscious person's mouth clear of the water within 5 seconds
C.The suit is flameproof and provides protection to a wearer swimming in burning oil
D.The suit may be stored in a machinery space where the ambient temperature is 160°F