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Which of the following is a low cost pavement de-icing mixture?

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Which of the following is a low cost pavement de-icing mixture?

(a) Carbon Mixture

(b) Aluminum mixture

(c) Urea mixture

(d) Quartz Mixture

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My question is based upon Aircraft Electronics topic in chapter Aircraft Electronics of Aircraft Maintenance

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Correct option is (c) Urea mixture

Explanation: Urea mixture is an economical de-icing mixture used primarily for deicing airport pavements. After application, the mixture gets converted into ammonia and thus has been phased out of most airports around the world.

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