For a cylinderical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness?

Process Equipment and Plant Design
For a cylinderical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness?

Ellipsoidal (2 : 1)

Hemispherical

Conical

Flat plate

Ellipsoidal (2 : 1)

Hemispherical

Conical

Flat plate

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Process Equipment and Plant Design
At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally.

Unpredictable

Lower

Higher

Same

Unpredictable

Lower

Higher

Same

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Process Equipment and Plant Design
In a vertical short tube evaporator (Calendria type), the

Liquor is inside the tube while the steam is outside the tube

Tube dia of 2.5-7.5 cms, tube length of 75-200 cms and cylinderical drum dia of 1-6 metres are normally used

All of these

Area of central downtake is equal to 40 to 100% of total cross-sectional area of the surrounding tube

Liquor is inside the tube while the steam is outside the tube

Tube dia of 2.5-7.5 cms, tube length of 75-200 cms and cylinderical drum dia of 1-6 metres are normally used

All of these

Area of central downtake is equal to 40 to 100% of total cross-sectional area of the surrounding tube

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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.

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

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

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

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

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

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

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Process Equipment and Plant Design
The wall thickness for a large high pressure pipeline is determined by the consideration of the

Forces exerted by static and dynamic action at bends

Axial tensile stress in the pipe

Circumferential pipewall tension

Temperature stresses

Forces exerted by static and dynamic action at bends

Axial tensile stress in the pipe

Circumferential pipewall tension

Temperature stresses

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Process Equipment and Plant Design
The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the __________ stress.

None of these

Damaging

Allowable

Working

None of these

Damaging

Allowable

Working

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Process Equipment and Plant Design

Process Equipment and Plant Design For a cylinderical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness?

Process Equipment and Plant Design At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally.

Process Equipment and Plant Design In a vertical short tube evaporator (Calendria type), 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 The wall thickness for a large high pressure pipeline is determined by the consideration of the

Process Equipment and Plant Design
For a cylinderical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness?

Process Equipment and Plant Design
At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally.

Process Equipment and Plant Design
In a vertical short tube evaporator (Calendria type), 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
The wall thickness for a large high pressure pipeline is determined by the consideration of the