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  3. You’re alone, driving on a deserted stretch of highway. Suddenly you are enclosed by clouds of smoke and steam as the engine-tem

You’re alone, driving on a deserted stretch of highway. Suddenly you are enclosed by clouds of smoke and steam as the engine-tem

admin2011-04-26  37
问题     You’re alone, driving on a deserted stretch of highway. Suddenly you are enclosed by clouds of smoke and steam as the engine-temperature light flashes its red warning. You pull over to the slow lane and switch on the four-way emergency flashers. Then what? Should you keep on rolling or get off the road as fast as you can safely do so?Knowing what is happening and what to do in a car emergency can save time, money, worry--even your life.So learning how to check your car will help you handle some common car emergencies.
    The engine’s bearings must constantly be lubricated (使润滑) by oil that circulates under pressure. When the oil pressure drops too low, the engine begins to self-destruct. The red oil-pressure warning light flashes on. Listen for any knocking, and sign of serious trouble. If the warning light flashes only at highway speeds and goes out at low speeds or while the engine idles, chances are’ the engine is just slightly low on oil. If the light goes on at idle, but goes out when you accelerate, drive slowly to the repair shop. It is a matter of minutes after oil pressure drops that serious engine damage occurs. You could destroy the engine.
    The engine temperature warning light signals that the engine is running hotter than normal. Switching on your heater at the first sign of overheating may help delay a boilover--by drawing off some of the excess heat. Reducing speed may also help. If the light goes out, proceed to the nearest service station for help. If too much coolant has been lost, the engine will boil over, surrounding the engine with steam. If this happens, pull completely off the road, stop and wait. Don’t rush out and open the hood (发动机翼) in the steam. Wait until the vapor goes away and the engine metal cools. But remember that this can take a few hours on a hot summer day.
What will happen to the engine when oil pressure drops?
选项 A、It will be damaged when the engine stops working.
B、Very soon it will be severely damaged.
C、Serious damage to it is not likely to occur within the first few minutes.
D、Damage may occur to the engine when you drive the car at high speed.
答案B
解析 本题为细节辨析题。文中提到，当油压下降，距离发动机损坏就只有几分钟的时间了。因此，“油压下降，很快发动机就会严重损坏”。
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