In actual operation of a bubble cap distillation tower, the __________ at the bottom of the tower is more than that at the top of the tower. Molal flow rate of vapour All of these Pressure and temperature Vapour molecular weight TRUE ANSWER : ? YOUR ANSWER : ?
With increase in the number of shell passes, the value of FT Increases Remains same, only if the number of tube passes does not change Decreases Remains same TRUE ANSWER : ? YOUR ANSWER : ?
Movement of pipeline caused by thermal expansion is taken care by providing Changes in its direction Expansion joint Change in the shape of pipeline All of these TRUE ANSWER : ? YOUR ANSWER : ?
Elastic failure of a material occurs, when the tensile stress equals yield strength, yield point or the elastic limit. Also, the elastic failure occurs according to maximum strain theory, when the maximum tensile strain equals (where, σ = yield strength and E = modulus of elasticity) E E/σ Σ/E Σ TRUE ANSWER : ? YOUR ANSWER : ?
For a cylinderical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness? Hemispherical Ellipsoidal (2 : 1) Flat plate Conical TRUE ANSWER : ? YOUR ANSWER : ?
Weep holes provided in the plates of a distillation column Facilitate draining out liquid from a tray when the unit is not in operation All of these Are normally located near the overflow weir so that any delivery of liquid during operation follows approximately the same path as the overflow fluid Must be large enough (usually 1/4" to 5/8" dia) to prevent plugging but should not deliver excessive amount of fluid during operation TRUE ANSWER : ? YOUR ANSWER : ?
A pressure vessel is said to be made of 'thick' shell, if the ratio of its diameter to wall thickness is 10 10 20 20 TRUE ANSWER : ? YOUR ANSWER : ?
Reflux ratio variation in a distillation column is between Minimum and infinity Zero and one Zero and infinity None of these TRUE ANSWER : ? YOUR ANSWER : ?
Longitundinal stress induced in a thin walled cylindrical storage vessel is PD/4t PD/6t PD/2t PD/3t TRUE ANSWER : ? YOUR ANSWER : ?
For laminar flow (NRe < 2100) in steel pipe, the optimum inside pipe diameter is given by Di, opt = 3.9 Q0.45 . ρ0.23 Di, opt = 3 Q0.36 . ρ1.86 μ0.08 Di, opt = 7.6 Q0.36 . ρ0.9 Di, opt = 3 Q0.36 ρ0.18 TRUE ANSWER : ? YOUR ANSWER : ?