Related Mcqs:

1. Prandtl and Reynolds analogy are same, when Prandtl number is____________________?

   A. 0.5
   B. 1
   C. > 2
   D. 1.5

2. Value of Prandtl number for water ranges from_________________?

   A. 1 to 2
   B. 5 to 10
   C. 100 to 500
   D. 1000 to 2000

3. Prandtl and Reynold’s analogies are identical for Prandtl number value of__________________?

   A. 0
   B. 0.5
   C. 1
   D. 5

4. For what value of Prandtl number, the Col-burn analogy is valid ?

   A. 0.06 to 120
   B. 0.6 to 120
   C. 1 to 103
   D. 1 to 50

5. For what value of Prandtl number, St = f/2 ?

   A. 1.5
   B. 1
   C. > 1
   D. < 1

6. At what value of Prandtl number, conduction is negligible in the turbulent core of a fluid flowing through a heated pipe ?

   A. 0.5
   B. < 0.5
   C. > 0.6
   D. < 0.1

7. Heat transfer by conduction in the turbulent core of a fluid flowing through a heated pipe is negligible, if the value of Prandtl number is_______________?

   A. 0.2
   B. 0.4
   C. 0.6
   D. 0.8

8. At what value of Prandtl number, the hydrodynamic and thermal boundary layers of a fluid flowing over a heated plate will be identical ?

   A. 1
   B. 1
   D. None of these

9. Thickness of thermal boundary layer is more compared to that of hydrodynamic boundary layer, when the value of Prandtl number is_________________?

   A. 1
   B. < 1
   C. > 1
   D. > 5

10. Analogy between mass and heat transfer is not applicable in case of____________________?

    A. Same velocity profile or equal eddy diffusivities
    B. Thermal or pressure mass diffusion
    C. Viscous heating or chemical reaction
    D. Both B. and C.