Typical static submergence for bubble cap plate column operating at atmospheric pressure may be around _________________?

For identical situation, condensing film coefficient in case of a horizontal condenser is almost ______________ the value expected in case of vertical condenser? A. Half B. TwiceC. Thrice D. Five times

The wall thickness of thin cylindrical shell with hemispherical ends is ______________ that of the spherical ends? A. Equal toB. More than C. Less than D. Either B. or C.; depends on maximum permissible internal pressure

In a continuous distillation column, the optimum reflux ratio ranges from _______________ times the minimum reflux ratio? A. 1.1 to 1.5 B. 1.6 to 2 C. 2.2 to 2.6 D. 2.7 to 3

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____________________? A. Increases B. DecreasesC. Remain same D. May increase or decrease depending upon the solubility of the gas in the liquid

Seamless pipe is made________________? A. From rolled strips formed into cylinders and seam-welded B. By extrusion & casting into static and centrifugal molds C. By forging a solid round, piercing it by simultaneously rotating & forcing it over a piercer point and further reducing it by rolling gas drawingD. Both B. and C.

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 crosssection H = hold up of solid.) ? A. Z.H.ρ/L B. L/Z.H.ρ C. H.ρ/L D. Z.H/ρL