Q.1
Assume the following thermos-physical properties of air
  • a) 0.423
  • b) 0.523
  • c) 0.623
  • d) 0.723
Q.2
Air atdegree Celsius temperature flows atm/s past a wet flat plate of length 0.5 m. Estimate the value of mass transfer coefficient. Assume that the water vapor content of air initially is negligible and take the following thermos-physical properties of air
  • a) 0.1076 m/s
  • b) 0.2076 m/s
  • c) 0.3076 m/s
  • d) 0.4076 m/s
Q.3
Consider the above problem, find out the value of Reynolds number
  • a) 14.09 * 10 8
  • b) 14.09 * 10 7
  • c) 14.09 * 10 6
  • d) 14.09 * 10 5
Q.4
Assume the following thermos-physical properties of air
  • a) 2.89
  • b) 1.89
  • c) 3.89
  • d) 0.89
Q.5
Air at 1 atm anddegree Celsius temperature, flows inside a 3 cm diameter tube with a velocity of 5.m/s. Determine mass transfer coefficient for iodine transfer from the air stream to the weak surface. Assume the following thermos-physical properties of air
  • a) 0.0176 m/s
  • b) 1.0176 m/s
  • c) 2.0176 m/s
  • d) 3.0176 m/s
Q.6
Consider the above problem, find the value of Sherwood number
  • a) 84.44
  • b) 74.44
  • c) 64.44
  • d) 54.44
Q.7
The empirical correlation for local mass transfer coefficient for laminar boundary layer flow past a flat plate is given by
  • a) Sh X = 0.332 (Re) 0.5 (Sc) 0.23
  • b) Sh X = 0.332 (Re) 0.5 (Sc) 0.33
  • c) Sh X = 0.332 (Re) 0.5 (Sc) 0.43
  • d) Sh X = 0.332 (Re) 0.5 (Sc) 0.53
Q.8
The empirical correlation for local mass transfer coefficient for turbulent boundary layer flow past a flat plate is given by
  • a) Sh X = 0.332 (Re) 0.5 (Sc) 0.33
  • b) Sh X = 0.332 (Re) 0.6 (Sc) 0.33
  • c) Sh X = 0.0298 (Re) 0.7 (Sc) 0.33
  • d) Sh X = 0.0298 (Re) 0.8 (Sc) 0.33
Q.9
The expression for average mass transfer coefficient is
  • a) Sh = 0.664 (Re) 0.5 (Sc) 0.33
  • b) Sh = 0.664 (Re) 0.6 (Sc) 0.33
  • c) Sh = 0.332 (Re) 0.7 (Sc) 0.33
  • d) Sh = 0.332 (Re) 0.8 (Sc) 0.33
Q.10
Sherwood number is a function of
  • a) Lewis number and Reynolds number
  • b) Prandtl number and Lewis number
  • c) Reynolds number and Schmidt number
  • d) Schmidt number and Lewis number
0 h : 0 m : 1 s