It is not preferable to use superheated steam in evaporators, because of its very_________________?

Related Mcqs:

If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface temperature follows _____________ law?

A. Parabolic B. Hyperbolic C. Linear D. Logarithmic...

One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to________________?

A. Heat the water from 0°C to 100°C B. Evaporate the water C. To superheat the steam D. Data insufficient, can’t be predicted...

In a co-current double pipe heat exchanger used for condensing saturated steam over the inner tube, if the entrance and exit conditions of the coolant are interchanged, then the rate of condensation will___________________?

A. Increase B. Decrease C. Remain unchanged D. Either increase or decrease; depends on the coolant flow rate...

The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe, where the wall heat flux is constant, is__________________?

A. 2.36 B. 4.36 C. 120.36 D. Dependent on NRe only...

A process stream of dilute aqueous solution flowing at the rate of10 Kg.s-1 is to be heated. Steam condensate at 95°C is available for heating purpose, also at a rate of 10 Kg.s-1. A 1 – 1 shell and tube heat exchanger is available. The best arrangement is_______________?

A. Counter flow with process stream on shell side B. Counter flow with process stream on tube side C. Parallel flow with process stream on shell side D. Parallel flow with process stream on tube side...