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

Related Mcqs:

1. With the increase of temperature, the Col-burn jH factor_____________________?

   A. Increases
   B. Decreases
   C. Remains unchanged
   D. May increase or decrease; depending on temperature

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

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

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

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

4. Colburn analogy is applicable for the value of Prandtl number from_________________?

   A. 0.001 to 1
   B. 0.6 to 120
   C. 0.5 to 5
   D. 120 to 400

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. Value of Prandtl number for water ranges from_________________?

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