This set of Manufacturing Science Puzzles focuses on “Heat Transfer-2”.

1. Ratio of rate of heat conduction to the rate of internal energy storage is in solid is known as

a) Biot number

b) Drag coefficient

c) Eckert number

d) Fourier number

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Explanation: Fourier number is the ratio of rate of heat conduction to the rate of internal energy storage is in solid.

2. Ratio of pressure drop for internal flow through ducts is known as

a) Friction factor

b) Grashof number

c) Colburn factor

d) Nusselt number

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Explanation: Friction factor is the ratio of pressure drop for internal flow through ducts.

3. Ratio of buoyancy to viscous forces is known as

a) Friction factor

b) Grashof number

c) Colburn factor

d) Nusselt number

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Explanation: Grashof number is the ratio of buoyancy to viscous forces.

4. Which of the following is known as dimensionless heat transfer coefficient?

a) Friction factor

b) Grashof number

c) Colburn factor

d) None of the mentioned

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Explanation: Colburn factor is also known as dimensionless heat transfer coefficient.

5. Which of the following is known as dimensionless heat transfer coefficient?

a) Friction factor

b) Grashof number

c) Nusselt number

d) None of the mentioned

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Explanation: Nusselt number is also known as dimensionless heat transfer coefficient.

6. Ratio of convection heat transfer to conduction is known as

a) Friction factor

b) Grashof number

c) Colburn factor

d) Nusselt number

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Explanation: Nusselt number is the ratio of convection heat transfer to conduction.

7. Product of Prandtl number and Reynolds number is also known as

a) Peclet number

b) Prandtl number

c) Rayleigh number

d) Biot number

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Explanation: Peclet number is the product of Prandtl number and Reynolds number.

8. Ratio of molecular diffusivity to thermal diffusivity is also known as

a) Biot number

b) Prandtl number

c) Rayleigh number

d) Biot number

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Explanation: Prandtl number is the ratio of molecular diffusivity to thermal diffusivity.

9. Product of Grashoff and Prandtl number is known as

a) Peclet number

b) Biot number

c) Rayleigh number

d) Reynolds number

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Explanation: Rayleigh number is the product of Grashoff and Prandtl number.

10. Ratio of inertia to viscous forces is known as

a) Stanton number

b) Prandtl number

c) Rayleigh number

d) Reynolds number

View Answer

Explanation: Reynolds number is the ratio of inertia to viscous forces.

**Sanfoundry Global Education & Learning Series – Manufacturing Engineering.**

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