Q1-a) Answer by True (T) or False (F) on the following questions: [Marks: 1.54=6] i) Hemispherical head is good for high pressures and the cheapest to fabricate and thicker than vessel shell. ii) Design is an inexact art; errors and uncertainties will arise from uncertainties in the design data available and approximations necessary in design calculations. iii) Saddle supports are used for tall, vertical columns. iv) Pipe size is fabricated to nominal size with the outside diameter of a given size remaining constant while changing wall thickness is reflected in varying inside diameter