Q.1
##### Which parameter is responsible for the commencement of the turbulent flow?
• a) Fourier number
• b) Reynolds number
• c) Stanton number
• d) Nusselt number
Q.2
• a) 1800
• b) 2200
• c) 2600
• d) 3000
Q.3
• a) 4.353 m
• b) 3.353 m
• c) 2.353 m
• d) 1.353 m
Q.4
• a) 47648 W
• b) 12345 W
• c) 19879 W
• d) 97123 W
Q.5
##### Consider the above problem, find the rate at which steam is condensed at the tube surface
• a) 7.7 * 10 -3
• b) 8.7 * 10 -3
• c) 9.7 * 10 -3
• d) 10.7 * 10 -3
Q.6
• a) δ
• b) 3 δ
• c) 2 δ
• d) 4 δ
Q.7
• a) 4 m/δ b
• b) 2 m/δ b
• c) 3 m/δ b
• d) m /δ b
Q.8
##### Kirk bride criterion is given by
• a) h = 0.0057 (Re) 0.4 [k 3 p 2 g/δ 2] 1/3
• b) h = 0.0067 (Re) 0.4 [k 3 p 2 g/δ 2] 1/3
• c) h = 0.0077 (Re) 0.4 [k 3 p 2 g/δ 2] 1/3
• d) h = 0.0087 (Re) 0.4 [k 3 p 2 g/δ 2] 1/3
Q.9
##### The relation between relative effectiveness of horizontal and vertical tubes as condensing surfaces is given by
• a) h h/h v = 0.768 (l/d)
• b) h h/h v = 0.768 (l/d) 0.25
• c) h h/h v = 0.768 (l/d) 0.5
• d) h h/h v = 0.768 (l/d) 1.25
Q.10
##### For n-tubes in a vertical column of the tube bank pattern, identify the correct statement
• a) D e = n D
• b) D e = n 2 D
• c) D e = (1/n) D
• d) D e = D