A composite slab has two layers of different materials with thermal conductivities k1 and k2. If each layer has the same thickness, then the equivalent thermal conductivity of the slab will be

Byadmin September 14, 2022

Question: A composite slab has two layers of different materials with thermal conductivities k1 and k2. If each layer has the same thickness, then the equivalent thermal conductivity of the slab will be
[A].

k1k2

[B].

k1 + k2

[C].

[D].

Answer: Option D

Explanation:

No answer description available for this question.

CHEMICAL ENGINEERING | Heat Transfer

Fluid motion in the natural convection heat transfer between a solid surface and a fluid in contact with it, results from the

Question: Fluid motion in the natural convection heat transfer between a solid surface and a fluid in contact with it, results from the
[A].

existence of thermal boundary layer.
[B].
temperature gradient produced due to density difference
[C].
buoyancy of the bubbles produced at active nucleation site.
[D].
none of these.

Answer: Option D

Explanation:

No answer description available for this question.

Read More Fluid motion in the natural convection heat transfer between a solid surface and a fluid in contact with it, results from the
CHEMICAL ENGINEERING | Heat Transfer

Heat transfer in the laminar sublayer in case of a liquid flowing through a pipe, is mostly by

Question: Heat transfer in the laminar sublayer in case of a liquid flowing through a pipe, is mostly by
[A].

eddies current
[B].
conduction
[C].
convection
[D].
none of these

Answer: Option B

Explanation:

No answer description available for this question.

Read More Heat transfer in the laminar sublayer in case of a liquid flowing through a pipe, is mostly by
Engineering Materials | Mechanical Engineering

Duplex process of steel making is a combination of

Question: Duplex process of steel making is a combination of
[A].

basic bessemer and acid open hearth processes
[B].
acid bessemer and basic open hearth processes
[C].
acid bessemer and acid open hearth processes
[D].
basic bessemer and basic open hearth processes

Answer: Option B

Explanation:

No answer description available for this question.

Read More Duplex process of steel making is a combination of
Hydraulics and Fluid Mechanics | Mechanical Engineering

Bulk modulus of a fluid is the ratio of

Question: Bulk modulus of a fluid is the ratio of
[A].

shear stress to shear strain
[B].
increase in volume to the viscosity of fluid
[C].
increase in pressure to the volumetric strain
[D].
critical velocity to the viscosity of fluid

Answer: Option C

Explanation:

No answer description available for this question.

Read More Bulk modulus of a fluid is the ratio of
Engineering Mechanics | Mechanical Engineering

An irregular body may have more than one centre of gravity.

Question: An irregular body may have more than one centre of gravity.
[A].

Yes
[B].
No

Answer: Option B

Explanation:

No answer description available for this question.

Read More An irregular body may have more than one centre of gravity.
Refrigeration and Air Conditioning

On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process ________________?

On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process ________________?

A. involves no change in volume
B. takes place at constant temperature
C. takes place at constant entropy
D. takes place at constant enthalpy
E. takes place at constant pressure

Read More On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process ________________?

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