The temperature profile at a particular location on a surface is prescribed by the identity(t s t) / (t s t infinity) = (1/2) (y/0.0075) 3 + (3/2) (y/0.0075)

nIf thermal conductivity of air is stated to be 0.03 W/m K, determine the value of convective heat transfer coefficient

Explore topic-wise MCQs in Heat Transfer.

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1.	Air at 20 degree Celsius flows over a flat surface maintained at 80 degree Celsius. The local heat flow at a point was measured as 1250 W/m² .Take thermal conductivity of air as 0.028 W/m K, calculate the temperature at a distance 0.5 mm from the surface
A.	57.682 degree celsius
B.	67.682 degree celsius
C.	77.682 degree celsius
D.	87.682 degree celsius
Answer» B. 67.682 degree celsius

Discussion

2.	The temperature profile at a particular location on a surface is prescribed by the identity (t _s t) / (t _s t_infinity) = (1/2) (y/0.0075) ³+ (3/2) (y/0.0075)
A.	nIf thermal conductivity of air is stated to be 0.03 W/m K, determine the value of convective heat transfer coefficient
B.	4 W/m<sup>2 </sup>K
C.	5 W/m<sup>2 </sup>K
D.	6 W/m<sup>2 </sup>K
E.	7 W/m<sup>2 </sup>K
Answer» D. 6 W/m<sup>2 </sup>K

Discussion

3.	Consider the above problem, make calculations for the rate of heat dissipation from the cylinder fins by convection when motor cycle is moving at 60 km/hr and convective coefficient is 75 W/m² K
A.	9640 W
B.	9540 W
C.	9440 W
D.	9340 W
Answer» C. 9440 W

Discussion

Explore topic-wise MCQs in Heat Transfer.

Air at 20 degree Celsius flows over a flat surface maintained at 80 degree Celsius. The local heat flow at a point was measured as 1250 W/m2 .Take thermal conductivity of air as 0.028 W/m K, calculate the temperature at a distance 0.5 mm from the surface

The temperature profile at a particular location on a surface is prescribed by the identity(t s t) / (t s t infinity) = (1/2) (y/0.0075) 3 + (3/2) (y/0.0075)

Consider the above problem, make calculations for the rate of heat dissipation from the cylinder fins by convection when motor cycle is moving at 60 km/hr and convective coefficient is 75 W/m2 K

Air at 20 degree Celsius flows over a flat surface maintained at 80 degree Celsius. The local heat flow at a point was measured as 1250 W/m² .Take thermal conductivity of air as 0.028 W/m K, calculate the temperature at a distance 0.5 mm from the surface

The temperature profile at a particular location on a surface is prescribed by the identity
(t _s t) / (t _s t_infinity) = (1/2) (y/0.0075) ³+ (3/2) (y/0.0075)

Consider the above problem, make calculations for the rate of heat dissipation from the cylinder fins by convection when motor cycle is moving at 60 km/hr and convective coefficient is 75 W/m² K