Prandtl number is the reciprocal of____________________?

Byadmin March 2, 2019August 24, 2021

Prandtl number is the reciprocal of____________________?

A. Thermal diffusivity/Momentum diffusivity
B. Thermal diffusivity × Momentum
C. Thermal diffusivity × Mass diffusivity
D. Mass diffusivity × Momentum diffusivity

Chemical Heat Transfer

Boiling point elevation for a strong and concentrated solution is found by Duhring’s rule, which states that at the same pressure, the boiling point of a solution is a linear function of the _______________ of pure water?

Boiling point elevation for a strong and concentrated solution is found by Duhring’s rule, which states that at the same pressure, the boiling point of a solution is a linear function of the _______________ of pure water?

A. Boiling point
B. Dynamic viscosity
C. Kinematic viscosity
D. Density

Read More Boiling point elevation for a strong and concentrated solution is found by Duhring’s rule, which states that at the same pressure, the boiling point of a solution is a linear function of the _______________ of pure water?
Chemical Heat Transfer

If the baffle spacing in a shell and tube heat exchanger increases, then the Reynolds number of the shell side fluid_________________?

If the baffle spacing in a shell and tube heat exchanger increases, then the Reynolds number of the shell side fluid_________________?

A. Remains unchanged
B. Increases
C. Increases or decreases depending on number of shell passes
D. Decreases

Read More If the baffle spacing in a shell and tube heat exchanger increases, then the Reynolds number of the shell side fluid_________________?
Chemical Heat Transfer

A hot body will radiate heat most rapidly, if its surface is___________________?

A hot body will radiate heat most rapidly, if its surface is___________________?

A. White & rough
B. Black & rough
C. White & polished
D. Black & polished

Read More A hot body will radiate heat most rapidly, if its surface is___________________?
Chemical Heat Transfer

_____________ equation relates the thermal conductivity of a solid to its temperature ?

_____________ equation relates the thermal conductivity of a solid to its temperature ?

A. Antoine
B. Kopp’s
C. Lee’s
D. Kistyakowsky

Read More _____________ equation relates the thermal conductivity of a solid to its temperature ?
Chemical Heat Transfer

In case of surface condensers, a straight line is obtained on plotting 1/U vs. ____________ on an ordinary graph paper?

In case of surface condensers, a straight line is obtained on plotting 1/U vs. ____________ on an ordinary graph paper?

A. 1/V̅ -0.8
B. V̅ -0.8
C. V̅ -2
D. 1/ V̅ -2

Read More In case of surface condensers, a straight line is obtained on plotting 1/U vs. ____________ on an ordinary graph paper?
Chemical Heat Transfer

The rate of heat transfer through a pipe wall is given by, q = 2π k (Ti – T0)/ln (ri/r0). For cylinder of very thin wall, q can be approximated by__________________?

The rate of heat transfer through a pipe wall is given by, q = 2π k (Ti – T0)/ln (ri/r0). For cylinder of very thin wall, q can be approximated by__________________?

A. q = [2π k (Ti + T0)/2]/ln (ri/r0)
B. q = 2π ri k (Ti – T0)/(r0/ri)
C. q = 2π k (Ti – T0)/(r0/ri)
D. q = 2π k (Ti – T0)/[(r0 + ri)/2]

Read More The rate of heat transfer through a pipe wall is given by, q = 2π k (Ti – T0)/ln (ri/r0). For cylinder of very thin wall, q can be approximated by__________________?

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