Question

Presence of moisture in the thermal insulating material increases thermal insulation while the presence of air spaces decreases thermal insulation.

(a) True

(b) False

I had been asked this question during an internship interview.

Origin of the question is Thermal Insulation in portion Air Conditioning, Thermal Insulation, Stones & Ferrous Metals of Construction & Building Materials

Answer 1

Correct answer is (b) False

To explain I would say: Presence of moisture in the thermal insulating material decreases thermal insulation while the presence of air spaces increases thermal insulation. The choice of the thermal insulating material depends on various factors like cost of material, area to be covered, coat of heating or cooling, etc.