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.

Process Equipment and Plant Design
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.

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

None of these

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

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

None of these

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

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Process Equipment and Plant Design
Tube side pressure drop in a 1-2 heat exchanger (for turbulent flow of fluids through the tubes) is about __________ times, that in a 1-1 heat exchanger having the same size & number of tubes and operated at the same liquid flow rate.

4

1/2

8

2

4

1/2

8

2

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Process Equipment and Plant Design
With increase in temperature drop (in a shell and tube heat exchanger), the LMTD correction factor, FT

Decreases very rapidly

Increases linearly

Remains constant

Increases very rapidly

Decreases very rapidly

Increases linearly

Remains constant

Increases very rapidly

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Process Equipment and Plant Design
The LMTD correction factor (FT) is defined as the

Ratio of LMTD to the true temperature difference

Geometric mean of the true temperature difference and the LMTD

Differenced of true temperature difference and the LMTD

Ratio of true temperature difference to the LMTD

Ratio of LMTD to the true temperature difference

Geometric mean of the true temperature difference and the LMTD

Differenced of true temperature difference and the LMTD

Ratio of true temperature difference to the LMTD

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Process Equipment and Plant Design
The normal range of velocity of water in pipes is __________ m/sec.

10-50

15-30

1-2

0.1-0.5

10-50

15-30

1-2

0.1-0.5

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Process Equipment and Plant Design
For laminar flow (NRe < 2100) in steel pipe, the optimum inside pipe diameter is given by

Di, opt = 3.9 Q0.45 . ρ0.23

Di, opt = 7.6 Q0.36 . ρ0.9

Di, opt = 3 Q0.36 ρ0.18

Di, opt = 3 Q0.36 . ρ1.86 μ0.08

Di, opt = 3.9 Q0.45 . ρ0.23

Di, opt = 7.6 Q0.36 . ρ0.9

Di, opt = 3 Q0.36 ρ0.18

Di, opt = 3 Q0.36 . ρ1.86 μ0.08

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Process Equipment and Plant Design

Process Equipment and Plant Design 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.

Process Equipment and Plant Design Tube side pressure drop in a 1-2 heat exchanger (for turbulent flow of fluids through the tubes) is about __________ times, that in a 1-1 heat exchanger having the same size & number of tubes and operated at the same liquid flow rate.

Process Equipment and Plant Design With increase in temperature drop (in a shell and tube heat exchanger), the LMTD correction factor, FT

Process Equipment and Plant Design The LMTD correction factor (FT) is defined as the

Process Equipment and Plant Design The normal range of velocity of water in pipes is __________ m/sec.

Process Equipment and Plant Design For laminar flow (NRe < 2100) in steel pipe, the optimum inside pipe diameter is given by

Process Equipment and Plant Design
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.

Process Equipment and Plant Design
Tube side pressure drop in a 1-2 heat exchanger (for turbulent flow of fluids through the tubes) is about __________ times, that in a 1-1 heat exchanger having the same size & number of tubes and operated at the same liquid flow rate.

Process Equipment and Plant Design
With increase in temperature drop (in a shell and tube heat exchanger), the LMTD correction factor, FT

Process Equipment and Plant Design
The LMTD correction factor (FT) is defined as the

Process Equipment and Plant Design
The normal range of velocity of water in pipes is __________ m/sec.

Process Equipment and Plant Design
For laminar flow (NRe < 2100) in steel pipe, the optimum inside pipe diameter is given by