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?

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

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Process Equipment and Plant Design
A stuffing box is used for

Reducing the resistance of fluid flow
Absorbing the contraction/expansion of pipeline due to temperature changes
Prevention of fluid leakage around moving parts
Facilitating smooth opening and closing of a valve

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