PROCESS EQUIPMENT AND PLANT DESIGN QUIZ

When one of the fluids is highly corrosive and has fouling tendency, it should

Perferably flow outside the tube

Preferably flow inside the tube for its easier internal cleaning

Flow outside the tube, when the flow is counter-current and inside the tube when the flow is co-current

Flow at a very slow velocity

TRUE ANSWER : ?
YOUR ANSWER : ?

The optimum size ratio for two mixed reactors in series depends on the kinetics of the reaction and the conversion level. For reaction orders more than one, the

Equal sized reactors are the best

Larger reactor should come first

None of these

Smaller reactor should come first

TRUE ANSWER : ?
YOUR ANSWER : ?

Bubble cap tray is the most commonly used tray in large distillation column, because

It incurs less pressure drop as compared to any other try designed for the same duty

Of its flexibility and nearly constant efficiency under varying conditions of operation

It eliminates the foaming and entrain-ment tendency during operation

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The retention time of material in a rotary dryer depends upon its

All of these

Slope & length

Flights arrangement

Rpm

TRUE ANSWER : ?
YOUR ANSWER : ?

Hole diameter of the seive trays in the distillation column ranges from __________ mm.

3 to 12.5

L to 3

12.5 to 18.5

4 to 8

TRUE ANSWER : ?
YOUR ANSWER : ?

Large process vessels operating under extreme temperature and pressure conditions are normally clad/ lined with materials like stainless steel, aluminium, nickel & its alloys, copper & its alloys and titanium. The cladding thickness is generally about __________ percent of the total thickness.

40 to 50

10 to 20

1 to 5

30 to 40

TRUE ANSWER : ?
YOUR ANSWER : ?

Rotary driers are most economically designed for the number of heat transfer units (HTU) from

5 to 10

0.01 to 1

1.5 to 2.5

10 to 20

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YOUR ANSWER : ?

Pressure differential maintained across a continuous rotary vacuum filter is in the range of __________ mm Hg column.

600 to 700

250 to 500

100 to 150

50 to 100

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YOUR ANSWER : ?

For laminar flow (NRe < 2100) in steel pipe, the optimum inside pipe diameter is given by

Di, opt = 3 Q0.36 ρ0.18

Di, opt = 3 Q0.36 . ρ1.86 μ0.08

Di, opt = 7.6 Q0.36 . ρ0.9

Di, opt = 3.9 Q0.45 . ρ0.23

TRUE ANSWER : ?
YOUR ANSWER : ?

In a distillation column, bubble caps are located on trays with a pitch of __________ times the outside diameter of the caps.

1.6 to 2

1.5 to 3

2.5

1.3 to 2

TRUE ANSWER : ?
YOUR ANSWER : ?

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