__________ liquor is best handled in a long tube vertical evaporator.

__________ shaped roof is most commonly used for cylindrical tanks.

Tube side heat transfer co-efficient for turbulent flow of liquid through tubes is proportional to

At the following point for a given packing and set of fluids, the pressure drop per metre of packed height, with variation in fluid rates and operating pressure

Nominal size of a pipe is an indication of its __________ diameter.

In a shell and tube heat exchanger, the overall heat transfer co-efficient is proportional to the tube side (volumetric flow rate)^0.8. This is valid, only when the ratio of the tube side film resistance to the total resistance is almost equal to

Shortest distance between two tubes is

A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator

Vertical condenser is advantageous to the horizontal condenser from operation point of view, when

__________ dished head is the strongest of all.

In the agitators, the power required will be changed with the increase of diameter of agitator (D) as

Theoretically calculated diameter of the stripping section of the continuous rectification column is __________ that of the enriching section.

In a thin cylindrical shell, the hoop stress is __________ stress.

Circumferential (hoop) stress in a thin cylindrical vessel under internal pressure is __________ the longitudinal stress.

Excessive liquid gradient on a tray may result in the

Apex angle of conical heads used in the bottom heads of chemical process equipments is usually

Hold up of material in a operating rotary drier is in the range of

Commercial packed scrubbers are normally designed for a pressure drop range of __________ mm water coloumn per metre of packed height.

The dust collection efficiency of electrostatic precipitator increases with increase in the

The ratio of tube length to shell diameter in case of liquid shell and tube heat exchanger ranges from

Back-trapping in a distillation column results due to

Pick out the wrong statement pertaining to the design of the distillation column.

Commercial packed scrubbers are normally designed for a pressure drop range of __________ mm water coloumn per metre of packed height.

For a cylinderical vessel of moderate height, the weld joint efficiency for joints parallel to the cylinderical axis is given as 1.while for joints along the girth (circumference) it is given as 0.In calculating the shell wall thickness using code formula for an internally pressurised cylinderical vessel, what value of weld joint efficiency should be used ?

The longitudinal stress induced in a thin walled cylinderical vessel under internal pressure is

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

Value of Peclet number =is the representative of

Maximum plate efficiency is achieved in case of __________ flow.

For annular flow of a fluid, the ratio of the equivalent diameter for pressure drop calculation to the equivalent diameter for heat transfer calculation is

Diameter of bubble caps used in high pressure columns is __________ as compared to that used in identical vacuum columns.

In distillation columns, bubble caps are held in place over trays by

The length of straight rectangular weir used on cross-flow trays is generally __________ the column diameter.

In a rotary drier, the average retention time of solid is(where Z = length of the drier, metres ρ = apparent solid density, kg/m³ L = flow rate of dry solids, kg/see. m² drier cross-section H = hold up of solid.)

Poisson's ratio of a material is the ratio of unit lateral strain to the unit axial elongation within its elastic limit. The value of Poisson's ratio for structural and pressure vessel steel may be taken as

The LMTD correction factor (F_T) is defined as the

The ideal size of round bubble caps to be used in industrial distillation column having a diameter of 3-6 metres is __________ cms.

The buckling tendency of compression members is always in the direction of the

What is the slope of the operating line in the rectifying section of a distillation coloumn ?

Removable connection of tubes to tube sheet is called

The clearance between two tubes in a shell and tube heat exchanger is known as 'ligament', whose minimum value is __________ the outside diameter of the tube, but in no case it should be less than 4.5 mm.

The thermal stress in a metallic bar does not depend upon the

Minimum tube pitch recommended for shell and tube heat exchangers is about __________ times the outside diameter of the tube.

Lap joints are preferred for plates having thickness __________ mm.

In case of plain carbon steel, butt welded joints are used for shell plate thickness ≤ __________ cms.

Stage efficiency for packed tower varies with the

The ratio for the rate of washing to the final rate of filtration in a washing type of plate and frame filter is

Stage efficiency for packed tower varies with the

The minimum baffle height should be

For turbulent flow (N_Re >of low viscosity fluid (μ > 20cp) in steel pipes, the optimum inside pipe diameter is given by(where, Q = fluid flow rate, ft³/sec.ρ = fluid density, lb/ft³ μ = fluid viscosity, centipoise D_i = optimum inside pipe diameter, inches)

Liquid redistribution should be done in a packed tower packed with raschig rings every 6 metres or __________ times the column diameter, whichever is lower.