Power required for agitation depends upon the

Process Equipment and Plant Design
Power required for agitation depends upon the

Height & properties of the liquid

Agitator type & speed of agitation

Size of agitator & the tank

All of these

Height & properties of the liquid

Agitator type & speed of agitation

Size of agitator & the tank

All of these

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Process Equipment and Plant Design
Pick out the wrong statement pertaining to the use of valve tray, seive tray and bubble cap trays in continuous distillation column.

Maintenance cost for valve and seive trays are comparatively more than bubble cap tray due to their relatively complicated construction features

Murphree efficiency of all the three trays are nearly equal, however the peak efficiency is generally higher for seive and valve trays than the bubble cap

Valve trays have the highest turn down ratio (i.e. the ratio of the highest to the lowest vapour flow rates) and thus provides the maximum flexible operating range

Bubble cap trays though most expensive are the best in situations, where low vapour rates is to be handled and a positive liquid seal is essential at all flow rates

Maintenance cost for valve and seive trays are comparatively more than bubble cap tray due to their relatively complicated construction features

Murphree efficiency of all the three trays are nearly equal, however the peak efficiency is generally higher for seive and valve trays than the bubble cap

Valve trays have the highest turn down ratio (i.e. the ratio of the highest to the lowest vapour flow rates) and thus provides the maximum flexible operating range

Bubble cap trays though most expensive are the best in situations, where low vapour rates is to be handled and a positive liquid seal is essential at all flow rates

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Process Equipment and Plant Design
Hold up of material in a operating rotary drier is in the range of

0.5 to 0.8

0.25 to 0.50

0.05 to 0.15

0.8 to 0.9

0.5 to 0.8

0.25 to 0.50

0.05 to 0.15

0.8 to 0.9

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Process Equipment and Plant Design
To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of

(1.2)3/2

(1.2)3/5

(1.2)5/3

(1.2)2/3

(1.2)3/2

(1.2)3/5

(1.2)5/3

(1.2)2/3

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Process Equipment and Plant Design
Smoker's equation for the calculation of number of equilibrium stages in a continuous binary distillation column is used, when the

Relative volatility is close to one (e.g., separation of close boiling isomers)

Number of equilibrium stages required is likely to be very small

Feed is not at its bubble point

Number of equilibrium stages in only stripping section is to be calculated

Relative volatility is close to one (e.g., separation of close boiling isomers)

Number of equilibrium stages required is likely to be very small

Feed is not at its bubble point

Number of equilibrium stages in only stripping section is to be calculated

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Process Equipment and Plant Design
A perforated plate has holes of diameter dh arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by

(ph - dh)/dh

(ph - dh . dt/2)/ph

(ph - dh)/ph

(ph - dt)/ph

(ph - dh)/dh

(ph - dh . dt/2)/ph

(ph - dh)/ph

(ph - dt)/ph

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Process Equipment and Plant Design

Process Equipment and Plant Design Power required for agitation depends upon the

Process Equipment and Plant Design Pick out the wrong statement pertaining to the use of valve tray, seive tray and bubble cap trays in continuous distillation column.

Process Equipment and Plant Design Hold up of material in a operating rotary drier is in the range of

Process Equipment and Plant Design To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of

Process Equipment and Plant Design Smoker's equation for the calculation of number of equilibrium stages in a continuous binary distillation column is used, when the

Process Equipment and Plant Design A perforated plate has holes of diameter dh arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by

Process Equipment and Plant Design
Power required for agitation depends upon the

Process Equipment and Plant Design
Pick out the wrong statement pertaining to the use of valve tray, seive tray and bubble cap trays in continuous distillation column.

Process Equipment and Plant Design
Hold up of material in a operating rotary drier is in the range of

Process Equipment and Plant Design
To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of

Process Equipment and Plant Design
Smoker's equation for the calculation of number of equilibrium stages in a continuous binary distillation column is used, when the

Process Equipment and Plant Design
A perforated plate has holes of diameter dh arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by