A. Equal to the impeller diameter
B. Twice the impeller diameter
C. Twice the tank diameter
D. 3/4 of the tank height
Related Mcqs:
- 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 - Minimum baffle spacing recommended in a shell and tube heat exchanger is equal to _____________________?
A. 5 cms
B. 40% of the I.D. of the shell
C. 25 cms
D. I.D. of the shell - 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 - Baffle width is normally taken as ______________ times the tank diameter?
A. 0.1-0.12
B. 0.4-0.5
C. 0.45-0.6
D. 0.2-0.45 - If ‘D’ is the inside diameter of the shell of a shell and tube heat exchanger, then the baffle spacing is usually in the range of__________________?
A. D/2 or minimum 2″ to 5D
B. D/5 or minimum 2″ to 5D
C. D/5 or minimum 2″ to D
D. None of these - Baffles are provided in a shell and tube heat exchanger to increase the turbulence and velocity of the shell side fluid. Which of the following shaped baffles does not fall in the category of transverse baffle ?
A. Segmental baffle
B. Flat plate extending across the wall
C. Disk type baffle
D. Helical type baffle - Baffle spacing is generally _________________ the I.D. of the shell ?
A. More than
B. Not greater than
C. Not less than one fifth of
D. Both B. and C. - Which of the following is the most common type of baffle used in industrial shell and tube heat exchanger ?
A. 75% cut segmental baffle
B. 25% cut segmental baffle
C. Orifice baffle
D. Disk and doughnut baffle - 25 per cent cut segmental baffle means that the baffle__________________?
A. Height is 75% of the I.D. of the shell
B. Height is 25% of the I.D. of the shell
C. Spacing is 75% of its height
D. Width is 25% of its height - 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
