MCQs
Total Questions : 47
| Page 3 of 5 pages
Answer: Option C. -> 2.945 m
Answer: (c).2.945 m
Answer: (c).2.945 m
Answer: Option D. -> 1.1376 cm
Answer: (d).1.1376 cm
Answer: (d).1.1376 cm
Answer: Option B. -> δ = 5.64 x/ (Re) ½
Answer: (b).δ = 5.64 x/ (Re) ½
Answer: (b).δ = 5.64 x/ (Re) ½
Answer: Option C. -> 48294
Answer: (c).48294
Answer: (c).48294
Answer: Option D. -> Thickness of the boundary layer is limited to the pipe radius
Answer: (d).Thickness of the boundary layer is limited to the pipe radius
Answer: (d).Thickness of the boundary layer is limited to the pipe radius
Answer: Option B. -> 1.6885 * 10¯³ m/s
Answer: (b).1.6885 * 10¯³ m/s
Answer: (b).1.6885 * 10¯³ m/s
Question 27. A two pass surface condenser is required to handle the exhaust from a turbine developing 15 MW with specific steam consumption of 5 kg/k W h. The quality of exhaust steam is 0.9, the condenser vacuum is 66 cm of mercury while the bar meter reads 76 cm of mercury. The condenser tubes are 28 mm inside diameter, 4 mm thick and water flows through tubes with a speed of 3 m/s and inlet temperature 20 degree Celsius. All the steam is condensed, the condensate is saturated water and temperature of cooling water at exit is 5 degree Celsius less than the condensate temperature. Assuming that overall coefficient of heat transfer is 4 k W/m² degree, determine the mass of cooling water circulated.
Answer: Option D. -> 446.13 kg/s
Answer: (d).446.13 kg/s
Answer: (d).446.13 kg/s
Answer: Option B. -> Temperature
Answer: (b).Temperature
Answer: (b).Temperature
Answer: Option A. -> Decreases
Answer: (a).Decreases
Answer: (a).Decreases
Answer: Option C. -> t S – t/t S – t INFINITY = 0.99
Answer: (c).t S – t/t S – t INFINITY = 0.99
Answer: (c).t S – t/t S – t INFINITY = 0.99