Search
.Management Sciences
Category: Chemical Heat Transfer
Loss of heat from untagged steam pipe to the ambient air is by __________________?
0
A. Conduction
B. Convection
C. Radiation
D. All A., B. & C.
Fourier’s law of heat conduction applies to _____________ surfaces?
A. Isothermal
B. Non-isothermal
C. Both A. and B.
D. Neither A. and B.
Conductance is given by (where, x = thickness, A = heat flow area, K = thermal conductivity.)?
A. x/KA
B. KA/x
C. K/Ax
D. A/Kx
Heat flux through several resistances in series in analogous to the current flowing through several_____________________?
A. Resistances in parallel
B. Capacitors in series
C. Resistances in series
D. None of these
Which of the following parameters is increased by use of finned tube in a multipass shell and tube heat exchanger ?
A. Tube side pressure drop and the heat transfer rate
B. Convective heat transfer co-efficient
C. Effective tube surface area for convective heat transfer
D. All A. B. and C.
Heat flux is the time rate of heat transfer per unit_______________?
A. Length
B. Area
C. Volume
D. None of these
Small scale evaporation is done in a_________________?
A. Heat exchanger
B. Condenser
C. Multiple effect evaporator
D. Steam jacketed kettle
The number of kg vaporised per kg of steam fed to the evaporator is defined as____________?
A. Capacity
B. Rate of evaporation
C. Economy
D. Rate of vaporisation
Recent Comments