Process Equipment and Plant Design MCQs

Question 1

Floating head heat exchangers are used for the

Accepted Answer

Cases where temperature difference between the shell and the tubes is more (>50°C)

Answer

Heat transfer between corrosive fluids

Answer

Co-current heat transfer systems

Answer

Counter-current heat transfer systems

Question 2

Maximum size of the raschig rings used in a packed tower is about __________ of the coloumn diameter.

Accepted Answer

$${\frac{1}{{30}}^{{	ext{th}}}}$$

Answer

$${\frac{1}{{10}}^{{	ext{th}}}}$$

Answer

$${\frac{1}{{20}}^{{	ext{th}}}}$$

Answer

$${\frac{1}{{50}}^{{	ext{th}}}}$$

Question 3

Mc Cable Thiele method used for finding theoretical stages in a distillation column assumes that the

Accepted Answer

All of the above

Answer

Sensible heat differences are small, because the temperature changes from tray to tray is small

Answer

Trouton's rule is applicable

Answer

Liquid/vapor loading across the column remains constant

Question 4

Longitundinal stress induced in a thin walled cylindrical storage vessel is

Accepted Answer

$$\frac{{{	ext{pD}}}}{{4{	ext{t}}}}$$

Answer

$$\frac{{{	ext{pD}}}}{{2{	ext{t}}}}$$

Answer

$$\frac{{{	ext{pD}}}}{{3{	ext{t}}}}$$

Answer

$$\frac{{{	ext{pD}}}}{{6{	ext{t}}}}$$