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


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1.單項(xiàng)選擇題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"

2.單項(xiàng)選擇題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

3.單項(xiàng)選擇題Which extinguishing agent will cool down a heated bulkhead in the least amount of time?（）

A.Water stream
B.Water fog or apray
C.Steam
D.Dry chemical

4.單項(xiàng)選擇題When loading or discharging dry mud or cement，crew members should use goggles and（）.

A.facial respirator mask
B.ear plugs
C.rubberized boots
D.fireman's outfit

5.單項(xiàng)選擇題When collecting condensation for drinking water，（）.

A.a sponge used to mop up and store condensation must be kept salt free
B.only condensation on the bottom of the canopy should be collected
C.it should be strained through a finely woven cloth
D.chlorine tablets should be used to make it drinkable