In SI units, thermal conductivity is expressed in Watt/m². °K Watt/m². °K Watt/m.°K Watt/m4. °K TRUE ANSWER : ? YOUR ANSWER : ?
Heat transfer by __________ may not necessarily require the presence of a medium natural convection radiation coduction none of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
Heat transfer co-efficient (h1) for liquids increases with Decreasing Reynolds number None of these Decreasing temperature Increasing temperature TRUE ANSWER : ? YOUR ANSWER : ?
Use of transverse baffles in a shell and tube heat exchanger is done to increase the Turbulence of shell side fluid Rate of heat transfer Flow velocity All of these TRUE ANSWER : ? YOUR ANSWER : ?
The actual temperature drop across the heating surface in an evaporator depends on the Pressure difference between steam chest and vapour space All of these Feed Depth of liquid over heating surface TRUE ANSWER : ? YOUR ANSWER : ?
The advantage of backward feed multiple effect evaporators over forward feed units is that Heat sensitive material can be handled Equal heat transfer co-efficients exist in various effects There is no additional cost of pumping Most concentrated liquid is at highest temperature TRUE ANSWER : ? YOUR ANSWER : ?
In a forward feed multiple effect, the pressure build up will be least at the outlet of the last effect highest at the outlet of the last effect least at the inlet of the first effect highest at the inlet of the last effect TRUE ANSWER : ? YOUR ANSWER : ?
Value of Nusselt number [Nu = (hD/k)] for the heat transfer by conduction from a droplet or a spherical particle to a surrounding stagnant film is 10 100 0.5 2 TRUE ANSWER : ? YOUR ANSWER : ?
Low thermal conductivity of heat insulating materials is due to its High specific heat None of these High proportion of air space Dense structure TRUE ANSWER : ? YOUR ANSWER : ?
According to Reynolds analogy, Stanton number is equal to f/4 f/2 2f f TRUE ANSWER : ? YOUR ANSWER : ?