单项选择题

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

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单项选择题

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

单项选择题

Which of the following would be of immediate concern after discovering a large fire in the ship’s galley?（）

A.An adjacent storeroom，containing spare parts
B.A storeroom directly above，containing combustible fluids
C.An adjacent storeroom，containing mattresses and linen
D.An adjacent storeroom，marked "Stewards Stores"

单项选择题

Which item may be substituted for，in the fireman’s outfit，on a cargo vessel?（）

A.fire ax
B.flashlight
C.rigid helmet
D.flame safety lamp