PROCESS EQUIPMENT AND PLANT DESIGN QUIZ

In the allocated cap area, bubble caps are generally arranged on equilateral triangular pitch. Number of caps fixed on a plate is with a

Cap pitch of 1.3-2 times the cap diameter

Clearance of 25-75 mm

Either A or B

Neither A nor B

TRUE ANSWER : ?
YOUR ANSWER : ?

Any shell opening greater than 5 cms for a storage tank must be reinforced for reason of

Making the joint leak proof

Preventing the local overstressing of the shell around the opening

None of these

Reduction of discontinuity in shape at the junction

TRUE ANSWER : ?
YOUR ANSWER : ?

Pick out the wrong statement pertaining to 'Horton sphere' used for the storage of liquid ammonia.

Horton sphere is used for the storage of gases and volatile liquid at a moderate pressure of 1 to 10 kg/cm²

Thickness of spherical shell is half that of the cylinderical vessel under same operating pressure condition. Besides, the ratio of surface area to volume is less for sphere than any other shape ; hen

Horton sphere is used for the storage of liquid at sub-zero temperature at very high pressure upto 200 kg/cm²

Diameter of Horton sphere is normally 6 to 25 metres and it is supported by 6 to 12 nos. tubular or rolled section column

TRUE ANSWER : ?
YOUR ANSWER : ?

In actual operation of distillation column, the vapour is not distributed uniformly among the bubble caps, primarily because of the

Lower skirt clearance

Lower static submergence

Liquid gradient on the tray

Small downcomer liquid seal

TRUE ANSWER : ?
YOUR ANSWER : ?

Rate of filtrate delivery is inversely proportional to the

Filtering area & the pressure difference driving force

Both A & B

Viscosity of filtrate

Cake & filter medium resistance

TRUE ANSWER : ?
YOUR ANSWER : ?

Welded joint efficiency in the design of chemical process equipment is taken as

0.75

0.95

0.55

0.85

TRUE ANSWER : ?
YOUR ANSWER : ?

In a multipass shell and tube heat exchanger, the shell side cross flow area does not depend upon

Pitch

None of these

Baffle spacing

Clearance

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ is the determining factor for the number of bubble caps to be used per tray.

Vapor load

Permissible slot velocity

Tray diameter

Liquid load

TRUE ANSWER : ?
YOUR ANSWER : ?

The minimum baffle height should be

3/4 of the tank height

Equal to the impeller diameter

Twice the impeller diameter

Twice the tank diameter

TRUE ANSWER : ?
YOUR ANSWER : ?

Low pressure steam (with saturation temperature between 105 to 120°C) is usually used in the vacuum evaporators, which normally employ a vacuum of about __________ mm Hg (referred to a 760 mm mercury barometer).

750

450

250

650

TRUE ANSWER : ?
YOUR ANSWER : ?