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Reflective sheet materials used as thermal insulating material have ___________ reflectivity and __________ emissivity.(a) High, high(b) High, low(c) Low, low(d) Low, highThis question was posed to me in examination.Origin of the question is Thermal Insulation topic in division Air Conditioning, Thermal Insulation, Stones & Ferrous Metals of Construction & Building Materials

Answer»

Right ANSWER is (b) High, low

Easiest EXPLANATION: Reflective sheet materials used as thermal INSULATING material have high reflectivity and low emissivity. Because of this property, it OFFERS high heat RESISTANCE.



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