_____________ heat exchanger is used for chilling oil to be dewaxed?

Related Mcqs:

The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m2.K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m2.K. The overall heat transfer co-efficient at this time is _____________________?

A. 1200 W/m2.K B. 894 W/m2.K C. 333 W/m2.K D. 287 W/m2.K...

The absorptivity of a grey body at a given temperature _____________ with increasing wavelength of radiation?

A. Increases B. Decreases C. Remain constant D. May increase or decrease; depends on the material...

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 purpose of providing expansion bellows in the shell of tubular exchanger is to _____________________?

A. Increase the heating load B. Impart structural strength C. Account for the uneven expansion of shell and tube bundles D. Facilitate increase of shell length, if needed...

When the ratio of the Grashoff number and to the square of Reynolds number is one, the dominant mechanism of heat transfer is _______________?

A. Free convection B. Entry length problem in laminar forced conduction (developing thermal boundary layer) C. Mixed convection (both free and forced) D. Forced convection...