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1.
In a distillation column, bubble caps are located on trays with a pitch of __________ times the outside diameter of the caps.
2.
In a shell and tube heat exchanger having square pitch, the shell side equivalent diameter is given by (where, P = pitch, d = outside diameter of the tube)
3.
Minimum tube pitch recommended for shell and tube heat exchangers is about __________ times the outside diameter of the tube.
4.
Brass valves are usually made for pipe sizes __________ inches.
5.
An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by
6.
Welded joint efficiency in the design of chemical process equipment is taken as
7.
Apex angle of conical heads used in the bottom heads of chemical process equipments is usually
8.
Diameter of rivet hole (d, mm) and the plate thickness (t, mm) are related by Unwin's formula as
9.
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
10.
The retention time of material in a rotary dryer depends upon its