Question

What is the loss dissipated by tubes by convection, given area of the tubes = 3.5?

(a) 12.3 W per °c

(b) 2.51 W per °c

(c) 5.3 W per °c

(d) 30.8 W per °c

The question was asked during an interview.

My doubt stems from Design of Tank in chapter Design of Transformers of Design of Electrical Machines

Answer 1

The correct option is (d) 30.8 W per °c

To elaborate: Loss dissipated by tubes by convection = 8.8 * Area of tubes

Loss = 8.8 * 3.5 = 30.8 W per °c.