PrepBharat

1. The mass transfer by convection can take place under how many conditions?
a) 1
b) 2
c) 3
d) 4

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2. Lewis number is given by
a) 4 α/D
b) 3 α/D
c) 2 α/D
d) α/D

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3. Prandtl number is given by
a) V/α
b) 2 V/α
c) 3 V/α
d) 4 V/α

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4. Schmidt number is given by
a) 2 V/D
b) D/V
c) V/D
d) 2 D/V

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5. Sherwood number is given by
a) 3/2 h _m L/D
b) ½ h _m L/D
c) 3 h _m L/D
d) h _m L/D

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6. The solution for velocity, concentration and temperature boundary layers will be same if
a) Prandtl number = Schmidt number= Lewis number
b) Prandtl number = 2 Schmidt number= Lewis number
c) Prandtl number = Schmidt number= 2 Lewis number
d) 2 Prandtl number = Schmidt number= Lewis number

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7. Convective mass transfer involves the transportation of material between a boundary surface and a moving fluid or between two immiscible fluids. It is prescribed by the relation
a) 2 h _m (d C _B)
b) ½ h _m (d C _B)
c) h _m (d C _B)
d) 3/2 h _m (d C _B)

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8. Which number forms the connecting link between the velocity and temperature profiles?
a) Fourier number
b) Prandtl number
c) Stanton number
d) Biot number

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9. Which number forms the connecting link between the velocity and concentration profiles?
a) Schmidt number
b) Reynolds number
c) Stanton number
d) Fourier number

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10. Which number forms the connecting link between the temperature and concentration profiles?
a) Prandtl number
b) Schmidt number
c) Fourier number
d) Lewis number

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