PROCESS EQUIPMENT AND PLANT DESIGN QUIZ

Pick out the wrong statement pertaining to the design of the bubble cap tray of a distillation column to give stable operation and even vapour distribution.

The dimensionless ratio of liquid gradient to pressure drop head caused by the bubble cap assembly should be less than 0.4

None of these

Tendency towards stable operation is increased by increasing the skirt clearance of the caps, lowering the rate of liquid flow per unit plate width or increasing the spacing between the caps

The pressure drop due to the caps & slots and the static submergence should be as high as practicable for reasonable operation

TRUE ANSWER : ?
YOUR ANSWER : ?

In a multipass shell and tube heat exchanger, the baffles on shell side is primarily provided for

Reducing scale deposition

Fixing the tubes

Increasing pressure drop

Creating turbulence

TRUE ANSWER : ?
YOUR ANSWER : ?

Column support for the roof of cylindrical storage tank must be provided for

All of these

Small diameter tanks

Small diameter tall tanks

Large diameter tanks

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ closure is the weakest enclosure for cylindrical vessels.

Hemispherical

Torispherical

Conical or flat plate

Elliptical

TRUE ANSWER : ?
YOUR ANSWER : ?

Cooling water fouling factors vary in the range of 0.001 to 0.003

(kcal/hr.m² .°C)⁻¹

(BTU/hr.ft² . °F)⁻¹

(kcal/hr. m. °C)⁻¹

(W/m².°K)⁻¹

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following types of reactors is the safest from operation point of view?

A liquid phase catalytic reactor

A vapor phase reactor

Pot type reactor

A liquid phase reactor

TRUE ANSWER : ?
YOUR ANSWER : ?

A binary liquid azeotropic mixture has boiling point higher than either of the components, when it shows __________ deviation from Raoult's Law.

Negative

None of these

Positive

No

TRUE ANSWER : ?
YOUR ANSWER : ?

Heat transfer co-efficient for a horizontal condenser as compared to a vertical condenser operating under similar conditions is

About 3 times

About 0.33 times

Same

Less

TRUE ANSWER : ?
YOUR ANSWER : ?

Excessive liquid gradient on a tray may result in the

Maldistribution of gas

All of these

Back trapping

Gas blowing beneath cap skit

TRUE ANSWER : ?
YOUR ANSWER : ?

For a cylindrical shell, (subject to the thickness of uppermost course being more than the minimum for diaofthe tank in question), the thickness of the courses of shell

Decreases upwards

Remains same throughout

May decrease or increase upwards depending upon whether vacuum or positive pressure would be maintained inside the shell

Increases upwards

TRUE ANSWER : ?
YOUR ANSWER : ?

↑