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) 4(P² - πd²/4)/πd Πd/4P² 4P²/πd (P² - πd²/4)/πd TRUE ANSWER : ? YOUR ANSWER : ?
The practical representative values of HETP for a number of commercial operations lies within a range of __________ metre. 1.2-1.5 0.1-0.2 0.2-0.5 0.4-0.9 TRUE ANSWER : ? YOUR ANSWER : ?
The thickness of segmental baffles (25 -35% cut truncated plates usually) is generally __________ the tube wall thickness. Twice Equal to Half Four times TRUE ANSWER : ? YOUR ANSWER : ?
In case of plain carbon steel, butt welded joints are used for shell plate thickness ≤ __________ cms. . 1.2 0.5 6.8 3.8 TRUE ANSWER : ? YOUR ANSWER : ?
The ratio of tube length to shell diameter in case of liquid shell and tube heat exchanger ranges from 4 to 8 3 to 5 2 to 3 6 to 12 TRUE ANSWER : ? YOUR ANSWER : ?
Wind load consideration in the design of a support can be neglected, when the vessel is Tall but empty Short (< 2 m) and housed indoor Tall (say 30 metres), but is full of liquid None of these TRUE ANSWER : ? YOUR ANSWER : ?
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 cross-section H = hold up of solid.) Z.H/L.ρ Z.H.ρ/L H.ρ/L L/Z.H.ρ TRUE ANSWER : ? YOUR ANSWER : ?
In a continuous distillation column, the optimum reflux ratio ranges from __________ times the minimum reflux ratio. 1.6 to 2 1.1 to 1.5 2.7 to 3 2.2 to 2.6 TRUE ANSWER : ? YOUR ANSWER : ?
Tube side heat transfer co-efficient for turbulent flow of liquid through tubes is proportional to G0.8 G0.2 G0.5 G1.5 TRUE ANSWER : ? YOUR ANSWER : ?
Lap joints are preferred for plates having thickness __________ mm. < 12.5 > 5 43961 > 3 TRUE ANSWER : ? YOUR ANSWER : ?