For heat flow through very thick walled cylinder, use ___________mean radius?

Related Mcqs:

Fouling factor for a heat exchanger is given by (where, U1 = heat transfer co-efficient of dirty surface U2 = heat transfer co-efficient of clean surface) ?

A. U1 – U2 B. 1/U1 – 1/U2 C. 1/U2 – 1/U1 D. U2 – U1...

Tube expansion allowances exist in _____________ heat exchanger?

A. Multipass fixed tube sheet B. U-tube C. Single pass fixed tube sheet D. None of these...

A _____________ evaporator employs an annular downtake?

A. Basket type B. Horizontal C. Long tube vertical D. None of these...

The units of resistance to heat transfer is _____________________?

A. J.m-2.K-1 B. J.m-1.K-1 C. W.m-2.K-1 D. W-1m2K...

Heat exchanger tubes are never made of_________________?

A. Plain carbon steel B. Stainless steel C. Lead D. Copper...