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.Management Sciences
Category: Chemical Heat Transfer
Temperature profile in steady state heat transfer is________________?
0
A. Asymptotic
B. Hyperbolic
C. Parabolic
D. Linear
Which is the most suitable for the concentration of foamy & frothy liquors ?
A. Agitated film evaporator
B. Long tube vertical evaporator
C. Open pan evaporator
D. None of these
Heat transfer co-efficient equation for forced convection, Nu = 0.023 Re 0.8. Pr n, is not valid, if the value of __________________?
A. n = 0.4 is used for heating
B. n = 0.3 is used for cooling
C. Reynolds number for the flow involved is > 10000
D. Reynolds number for the flow involved is < 2100
Corrosiveness of steam condensate is due to the presence of________________?
A. CO2
B. Dissolved O2
C. Both A. & B.
D. Neither A. nor B.
Presence of a non-condensing gas in a condensing vapour___________________?
A. Increases the rate of condensation
B. Decreases thermal resistance
C. Is desirable to increase the film co-efficient
D. None of these
The purpose of providing bleed points in the evaporator is to__________________?
A. Admit the feed
B. Remove the product
C. Facilitate removal of non-condensable gases
D. Create vacuum
____________ chart is known as transient heat conduction chart?
A. Dirhing’s
B. Heisler’s
C. Mollier’s
D. Cox
The equation, Nst = f/2, is the _____________ analogy?
A. Colburn
B. Reynolds
C. Prandtl
D. None of these
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