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1. Common applications of finned surfaces are with
(i) Electrical motors
(ii) Economizers for steam power plant
(iii) Convectors for steam and cold water heating systems
(iv) Cooling coils
Identify correct option


Hint Answer

2. The extended surface used for enhancement of heat dissipation is


Hint Answer

3. It is said that fins can take a variety of forms
(i) Longitudinal fins of rectangular cross section attached to a wall
(ii) Cylindrical tubes with radial fins
(iii) Conical rod protruding from a wall
Identify correct statement


Hint Answer

4. A steel rod (k = 30 W/m degree) 1 cm in diameter and 5 cm long protrudes from a wall which is maintained at 10 degree Celsius. The rod is insulated at its tip and is exposed to an environment with h = 50 W/m2 degree and t a = 30 degree Celsius. Calculate fin efficiency


Hint Answer

5. If fin is sufficiently thin, so heat flows pertain to


Hint Answer

6. If heat dissipation for one fin is given by 377.45 k J/hour, n what is heat dissipation for 12 fins?


Hint Answer

7. In order to achieve maximum heat dissipation, fin should be designed in such a way that has a


Hint Answer

8. A steel rod (k = 30 W/m degree) 1 cm in diameter and 5 cm long protrudes from a wall which is maintained at 10 degree Celsius. The rod is insulated at its tip and is exposed to an environment with h = 50 W/m2 degree and t a = 30 degree Celsius. Calculate rate of heat dissipation


Hint Answer

9. On a heat transfer surface, fins are provided to


Hint Answer

10. Analysis of heat flow from finned surface is made with following assumptions
(i) Uniform heat transfer coefficient, h over entire fin surface
(ii) No heat generation within fin generation
(iii) Homogenous material
Identify correct option


Hint Answer

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Heat Transfer from Extended Surfaces

Common applications of finned surfaces are with
(i) Electrical motors
(ii) Economizers for steam power plant
(iii) Convectors for steam and cold water heating systems
(iv) Cooling coils
Identify correct option

;

The extended surface used for enhancement of heat dissipation is

;

It is said that fins can take a variety of forms
(i) Longitudinal fins of rectangular cross section attached to a wall
(ii) Cylindrical tubes with radial fins
(iii) Conical rod protruding from a wall
Identify correct statement

;

A steel rod (k = 30 W/m degree) 1 cm in diameter and 5 cm long protrudes from a wall which is maintained at 10 degree Celsius. The rod is insulated at its tip and is exposed to an environment with h = 50 W/m2 degree and t a = 30 degree Celsius. Calculate fin efficiency

;

If fin is sufficiently thin, so heat flows pertain to

;

If heat dissipation for one fin is given by 377.45 k J/hour, n what is heat dissipation for 12 fins?

;

In order to achieve maximum heat dissipation, fin should be designed in such a way that has a

;

A steel rod (k = 30 W/m degree) 1 cm in diameter and 5 cm long protrudes from a wall which is maintained at 10 degree Celsius. The rod is insulated at its tip and is exposed to an environment with h = 50 W/m2 degree and t a = 30 degree Celsius. Calculate rate of heat dissipation

;

On a heat transfer surface, fins are provided to

;

Analysis of heat flow from finned surface is made with following assumptions
(i) Uniform heat transfer coefficient, h over entire fin surface
(ii) No heat generation within fin generation
(iii) Homogenous material
Identify correct option

;