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_________________?

Related Mcqs:

At what value of Prandtl number, conduction is negligible in the turbulent core of a fluid flowing through a heated pipe ?

A. 0.5 B. < 0.5 C. > 0.6 D. < 0.1...

Planck’s distribution law is valid for _____________ bodies?

A. Black B. White C. Coloured D. All A., B. & C....

The capacity of double-effect evaporator is less than half of the capacity of two single effects, each of which is operating over same terminal temperature difference, when the________________ ?

A. Solution has an elevation of boiling point B. Evaporators operate under vacuum C. Evaporators operate at atmospheric pressure D. None of these...

Prandtl number is the ratio of________________?

A. Momentum diffusivity to mass diffusivity B. Momentum diffusivity to thermal diffusivity C. Thermal diffusivity to mass diffusivity D. Thermal diffusivity to momentum diffusivity...

Increasing the liquor level in the evaporator results in the_______________?

A. Decreased capacity B. Increase in liquor film co-efficient C. Decreased effect of hydrostatic head D. Increased true temperature drop...