MCQs
Total Questions : 62
| Page 1 of 7 pages
Answer: Option B. -> 2
Answer: (b).2
Answer: (b).2
Answer: Option A. -> Turbulent
Answer: (a).Turbulent
Answer: (a).Turbulent
Answer: Option D. -> 1 and 2
Answer: (d).1 and 2
Answer: (d).1 and 2
Answer: Option A. -> 3-7 W/m² K
Answer: (a).3-7 W/m² K
Answer: (a).3-7 W/m² K
Answer: Option C. -> 1, 2 and 3
Answer: (c).1, 2 and 3
Answer: (c).1, 2 and 3
Question 6. The oil pan of 1.6 engine approximates a flat plate 0.3 m wide by 0.45 m long and protrudes below the framework of the automobile. The engine oil is at 95 degree Celsius and the ambient air temperature is 35 degree Celsius. If the automobile runs at 36 km/hr, make calculations for the rate of heat transfer from the oil-pan surface. Assume negligible resistance to conduction through the oil pan
Answer: Option C. -> 170.37 W
Answer: (c).170.37 W
Answer: (c).170.37 W
Answer: Option B. -> Reynolds number
Answer: (b).Reynolds number
Answer: (b).Reynolds number
Answer: Option D. -> Reynolds number are same
Answer: (d).Reynolds number are same
Answer: (d).Reynolds number are same
Question 9. Air flows through a 10 cm internal diameter tube at the rate of 75 kg/hr. Measurements indicate that at a particular point in the tube, the pressure and temperature of air are 1.5 bar and 325 K whilst the tube wall temperature is 375 K. Find heat transfer rate from one meter length in the region of this point
The general non-dimensional correlation for turbulent flow in the tube is
Nu = 0.023 (Re)^0.8 (Pr)^0.4
Where the fluid properties are evaluated at the bulk temperature
The general non-dimensional correlation for turbulent flow in the tube is
Nu = 0.023 (Re)^0.8 (Pr)^0.4
Where the fluid properties are evaluated at the bulk temperature
Answer: Option D. -> 177.35 W
Answer: (d).177.35 W
Answer: (d).177.35 W
Answer: Option A. -> p V l/δ
Answer: (a).p V l/δ
Answer: (a).p V l/δ