單項(xiàng)選擇題

When checking the liquid level in a tank, you should position yourself （）.

A.on the windward side of the opening
B.on the leeward side of the opening
C.at a right angle to the wind direction
D.so that the obstruction of your body will protect you from the fumes

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單項(xiàng)選擇題

The stability of a vessel is normally the greatest when all fuel and water tanks are full because the （）.

A.center of gravity is lowered
B.center of buoyancy is lowered
C.reserve buoyancy is unchanged
D.hull freeboard is increased

單項(xiàng)選擇題

Which of the following statements is true concerning Halon 1301 fire extinguishing equipment?（）

A.The agent is considered nontoxic at room temperature in low concentrations
B.The agent is less effective than carbon dioxide
C.Halon primarily extinguishes the fire by cooling
D.The agent cannot be used on electrical fires because it leaves a residue

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When checking the liquid level in a tank, you should position yourself （）.

你可能感興趣的試題

The stability of a vessel is normally the greatest when all fuel and water tanks are full because the （）.

Which of the following statements is true concerning Halon 1301 fire extinguishing equipment?（）

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