MCQs
Total Questions : 2525
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Answer: Option C. -> Schmidt number
Question 22. 1000 Kg of liquid at 30°C in a well stirred vessel has to be heated to 120°C, using immersed coils carrying condensing steam at 150°C. The area of the steam coils is 1.2 m² and the overall heat transfer co-efficient to the liquid is 1500 W/m².°C. Assuming negligible heat loss to the surrounding and specific heat capacity of the liquid to be 4 kJ/kg.°C, the time taken for the liquid to reach desired temperature will be
Answer: Option D. -> 51 min
Answer: Option C. -> Sphere
Answer: Option B. -> 1/U₁ - 1/U₂
Answer: Option A. -> Higher economy
Answer: Option B. -> The equivalent diameter of heat transfer for a duct of square cross-section (having each side as
Answer: Option A. -> The heat transfer rate is low in view of the large temperature drop
Answer: Option A. -> Grashhoff number
Answer: Option A. -> 1 and 0