The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, N<sub>Pr</sub> = N<sub>Sc</sub> = __________

The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________

A

1

B

0.5

C

10

D

0

What is the monoisotopic and average mass of valine? Given data: Mass of the most abundant isotope of Carbon (C°)=12.0000, Mass of most abundant isotope of Hydrogen (H°)=1.0078, Mass of most abundant isotope of Oxygen (O°)=15.9949, Mass of most abundant isotope of Nitrogen (N°)=14.0031, The average mass of Carbon (C)=12.011, The average mass of Hydrogen (H)=1.008, The average mass of Oxygen (O)=15.999, The average mass of Nitrogen (N)=14.007.

A

99.068 and 99.2361

B

99.216 and 99.326

C

99.111 and 99.321

D

99.068 and 99.132

Thermal diffusivity of a substance is given by (where h = Thermal diffusivity, ρ = Density of substance, S = Specific heat, and k = Thermal conductivity)

A

h = k/ ρS

B

h = ρS/k

C

h = S/ρk

D

h = kρ/S

Thermal diffusivity of a substance is given by (where h = Thermal diffusivity, $$\rho $$ = Density of substance, S = Specific heat and k = Thermal conductivity)

A

$${\text{h}} = \frac{{\text{k}}}{{\rho {\text{S}}}}$$

B

$${\text{h}} = \frac{{\rho {\text{S}}}}{{\text{k}}}$$

C

$${\text{h}} = \frac{{\text{S}}}{{\rho {\text{k}}}}$$

D

$${\text{h}} = \frac{{\rho {\text{k}}}}{{\text{S}}}$$

The ratio of momentum diffusivity to thermal diffusivity is the __________ number.

A

Prandtl

B

Nusselt

C

Stanton

D

Grashoff

Which number is defined as the ratio of momentum diffusivity to thermal diffusivity?

A

Prandtl number

B

Nusselt number

C

Reynold’s number

D

Sherwood number

The ratio of momentum diffusivity (kinematic viscosity) and mass diffusivity is referred as:

A

Nusselt number

B

Schimdt number

C

Sherwood number

D

Reynolds number

In fluid flow, and heat and mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular diffusivity (θ) and thermal diffusivity (α). The units of these quantities are.

A

μ , α and θ all have units of m/s

B

μ , α and θ all have units of m²/s

C

α and θ have units of m²/s, while μ has unit of m/s

D

α and θ have units of m/s, while μ has unit of m²/s

In fluid flow, heat and mass transfer, one encounters (i) kinematic viscosity μ (ii) molecular diffusivity (θ) and (iii) thermal diffusivity (α) the units of these quantities are:

A

μ, α and θ all have units of m/s

B

μ α and θ all have units of m²/s

C

μ and θ have units of m²/s while μ has units of m/s

D

μ and θ have units of m/s while μ has units of m²/s

In fluid flow and heat & mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular diffusivity (θ) and thermal diffusivity (α). The units of these quantities are

A

μ, α and θ all have units of m/s

B

μ, α and θ all have units of m²/s

C

α and θ have units of m²/s, while μ has unit of m/s

D

α and θ have units of m/s, while μ has unit of m²/s

The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, N_Pr = N_Sc = __________

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