Question 151. The equivalent diameter for fluid flow through a channel of constant non-circular cross section of area 'A' is given by (where, P = perimeter of the channel in contact with the fluid)

Question 152. The main purpose of providing stepping on the trays is to

Question 153. Heat transfer co-efficient for a horizontal condenser as compared to a vertical condenser operating under similar conditions is

Question 154. Slope of countercurrent flow rotary drier is in the range of __________ meter/metre.

Question 155. Flanges are connected to pipes by

Question 156. Compensation against openings in process vessels for giving inlet and outlet connections, for providing sight glasses and manholes etc. is provided for strength and rigidity. The most efficient type of compensation is of __________ type.

Question 157. In the design of a bag filter, the gas temperature is an important consideration, as it affects the

Question 158. The maximum liquid gradient over a tray must not exceed

Question 159. For a cylinderical vessel of moderate height, the weld joint efficiency for joints parallel to the cylinderical axis is given as 1.0, while for joints along the girth (circumference) it is given as 0.8. In calculating the shell wall thickness using code formula for an internally pressurised cylinderical vessel, what value of weld joint efficiency should be used?

Question 160. Excessive liquid gradient on a tray may result in the