If h1 = inner film co-efficient and /h2 = outer film co-efficient, then the overall heat transfer co-efficient is________________?

Related Mcqs:

Pick out the wrong statement?

A. Fluid movement under the influence of buoyant forces resulting from change in density takes place in case of natural convection B. The ratio NNu/NRe . Npr is called the Stanton number C. The Peclet number is a measure of the ratio of energy transport by convection to that by conduction D. The Colburn jH … Pick out the wrong statement?Read More...

Solid angle subtended by the finite surface at the radiating element is_________________?

A. Called the view factor B. Called the angle of vision C. Proportional to the square of the distance between surfaces D. Expressed in terms of radians...

Overall heat transfer co-efficient of a particular tube is U1. If the same tube with some dirt deposited on either side has coefficient U2, then_________________?

A. U1 = U2 B. U2 > U1 C. U1 > U2 D. U1 = dirt factor – U2...

The equation, (NSt × N2/3 Pr) = f/2, is the ____________ analogy ?

A. Colburn B. Reynolds C. Prandtl D. None of these...

The rate of emission of radiation by a body does not depend upon the__________________?

A. Wavelength of radiation B. Surface temperature of the body C. Nature of the surface D. Shape and porosity of the body...