Liquid gradient over the tray results due to the___________________?

Byadmin March 2, 2019August 23, 2021

Liquid gradient over the tray results due to the___________________?

A. Resistance offered to flow of liquids by caps & risers and the flow of gas
B. Low gas velocity
C. Large plate spacing
D. Large reflux ratio

Process Equipment and Plant Design

In case of a shell and tube heat exchanger, the effect of L/D on inside film heat transfer coefficient (hi) vanishes after a Reynold number of_____________?

In case of a shell and tube heat exchanger, the effect of L/D on inside film heat transfer coefficient (hi) vanishes after a Reynold number of_____________?

A. 1000
B. 3000
C. 5000
D. 10000

Read More In case of a shell and tube heat exchanger, the effect of L/D on inside film heat transfer coefficient (hi) vanishes after a Reynold number of_____________?
Process Equipment and Plant Design

The centre to centre distance between two consecutive baffles in a shell and tube heat exchanger is called the baffle pitch or baffle spacing, which is more than 1/5th the I.D. of the shell. Which of the following is not a function of the baffles ?

The centre to centre distance between two consecutive baffles in a shell and tube heat exchanger is called the baffle pitch or baffle spacing, which is more than 1/5th the I.D. of the shell. Which of the following is not a function of the baffles ?

A. To increase the residence time of shell side fluid
B. To provide support to the tube bundle
C. To reduce the induced vibration in the tubes
D. To increase the tube side heat transfer co-efficient by inducing turbulence

Read More The centre to centre distance between two consecutive baffles in a shell and tube heat exchanger is called the baffle pitch or baffle spacing, which is more than 1/5th the I.D. of the shell. Which of the following is not a function of the baffles ?
Process Equipment and Plant Design

Angled baffles are preferred in the agitation tank to control the swirling action; if the viscosity of the liquid to be mixed is about 200 poise. However, the baffle may be completely eliminated for mixing liquids having viscosity above ____________________ poise?

Angled baffles are preferred in the agitation tank to control the swirling action; if the viscosity of the liquid to be mixed is about 200 poise. However, the baffle may be completely eliminated for mixing liquids having viscosity above ____________________ poise?

A. 300
B. 600
C. 1000
D. 1500

Read More Angled baffles are preferred in the agitation tank to control the swirling action; if the viscosity of the liquid to be mixed is about 200 poise. However, the baffle may be completely eliminated for mixing liquids having viscosity above ____________________ poise?
Process Equipment and Plant Design

Minimum recommended baffle spacing in a shell and tube heat exchanger is about (where, D = shell diameter) ?

Minimum recommended baffle spacing in a shell and tube heat exchanger is about (where, D = shell diameter) ?

A. 0.2 D
B. 0.5 D
C. 0.66 D
D. 0.80 D

Read More Minimum recommended baffle spacing in a shell and tube heat exchanger is about (where, D = shell diameter) ?
Process Equipment and Plant Design

In a shell and tube heat exchanger, the ‘tube pitch’ is defined as the _____________________?

In a shell and tube heat exchanger, the ‘tube pitch’ is defined as the _____________________?

A. O.D. of the tube for square pitch
B. Shortest distance between two adjacent tube holes
C. Shortest centre to centre distance between adjacent tubes
D. None of these

Read More In a shell and tube heat exchanger, the ‘tube pitch’ is defined as the _____________________?
Process Equipment and Plant Design

A high vapour velocity is required for high plate efficiency in a sieve plate column. The satisfactory value of operating vapor velocity for design purpose in sieve plate column is about _______________ percent of the flooding velocity?

A high vapour velocity is required for high plate efficiency in a sieve plate column. The satisfactory value of operating vapor velocity for design purpose in sieve plate column is about _______________ percent of the flooding velocity?

A. 45
B. 60
C. 80
D. 95

Read More A high vapour velocity is required for high plate efficiency in a sieve plate column. The satisfactory value of operating vapor velocity for design purpose in sieve plate column is about _______________ percent of the flooding velocity?

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