Related Questions

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
Size reduction of the __________ can be suitably done by ball mills, crushing rolls and rod mills.
A Metalliferrous ores
B Non-metallic ores
C Basic slags
D Asbestos & mica
Ball mills and tube mills with flint or porcelain balls are used for size reduction of
A Asbestos
B Rubber
C Non-metallic ores
D Limestone
__________ mills fall in the category of tumbling mills,
A Ball and pebble
B Rod and tube
C Compartment
D All of the above
For achieving maximum capacity of the ball mill, the ball charge should be equal to about __________ percent of the ball mill volume.
A 10
B 25
C 50
D 75
The main function of baffles provided in a shell and tube heat exchanger is to
A Facilitate the cleaning of outer tube surface
B Enhance turbulence
C Hold the tubes in position
D All of the above
In a shell and tube heat exchanger, baffles are provided on the shell side to
A Improve heat transfer
B Provide support for tubes
C Prevent stagnation of shell side fluid
D All of these
Baffles provided on the shell side of a shell and tube heat exchanger are meant for
A Providing support for the tubes
B Improving heat transfer
C Both A & B
D Preventing the fouling of tubes & stagnation of shell side fluid
Baffles in mixing tanks are provided to
A Reduce swirling and vortex formation
B Increase the structural strength of the tank
C Aid in rotational flow
D None of these
Baffles are provided in heat exchangers to increase the
A Fouling factor
B Heat transfer area
C Heat transfer co-efficient
D Heat transfer rate

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