MCQs
Total Questions : 2525
| Page 21 of 253 pages
Answer: Option B. -> 2
Question 202. The inner wall of a furnace is at a temperature of 700°C. The composite wall is made of two substances, 10 and 20 cm thick with thermal conductivities of 0.05 and 0.1 W.m-1.°C-1 respectively. The ambient air is at 30°C and the heat transfer co-efficient between the outer surface of wall and air is 20 W.m⁻².°C-1. The rate of heat loss from the outer surface in W.m-2is
Answer: Option A. -> 165.4
Answer: Option D. -> Linear
Answer: Option C. -> 70
Answer: Option B. -> And the wall are proportional to individual resistances
Answer: Option B. -> 0
Answer: Option D. -> Film
Answer: Option A. -> Boiling point
Answer: Option A. -> Viscosity
Answer: Option D. -> All of the above