1. Fourier’s law applies to the heat transfer by

1. convection
2. radiation
3. conduction
4. all (a), (b) & (c)

2. When vaporization takes place directly at the heating surface, it is called

1. Film Boiling
2. Nucleate Boiling
3. Vapor Boiling
4. None of these

3. The thermal conductivity of Non-metallic solid (amorphous) , —————— with increase in temperature

1.  increases
2.  decreases
3. remains constant
4. first decreases upto certain temperature then increases

4. Shell side pressure drop in a shell and tube heat exchanger does not depend upon the

1. baffle spacing & shell diameter.
2. tube diameter & pitch.
3. viscosity, density & mass velocity of shell side fluid.
4. none of these.

5.  The steam ejector is used to

1. remove condensate from the steam pipelines
2. create vacuum.
3. superheat the steam.
4. none of these.

Check Your Answers Here 

1. 3
2. 3
3. 1
4. 4
5. 2