The safe height (h) to diameter (d) ratio (i.e., h/d) for liquid/petro fuel storage tank of capacity more than 45 kilolitres is less than 3 3.5 1 2 TRUE ANSWER : ? YOUR ANSWER : ?
Pressure differential maintained across a continuous rotary vacuum filter is in the range of __________ mm Hg column. 50 to 100 250 to 500 600 to 700 100 to 150 TRUE ANSWER : ? YOUR ANSWER : ?
To avoid the tearing off the plate of an edge, the margin (i.e., the minimum distance from the centre of the rivet hole to the nearest edge of the plate) should be equal to 1.5 d D 2.5 d 0.5 d TRUE ANSWER : ? YOUR ANSWER : ?
Diameter of bubble caps used in high pressure columns is __________ as compared to that used in identical vacuum columns. Same Less More Either A or B; no generalisation can be made TRUE ANSWER : ? YOUR ANSWER : ?
Back-trapping in a distillation column results due to Excessive liquid gradient over the tray High gas velocity Low gas velocity Low reflux ratio TRUE ANSWER : ? YOUR ANSWER : ?
Pick out the wrong statement pertaining to the design of the bubble cap tray of a distillation column to give stable operation and even vapour distribution. The dimensionless ratio of liquid gradient to pressure drop head caused by the bubble cap assembly should be less than 0.4 Tendency towards stable operation is increased by increasing the skirt clearance of the caps, lowering the rate of liquid flow per unit plate width or increasing the spacing between the caps The pressure drop due to the caps & slots and the static submergence should be as high as practicable for reasonable operation None of these TRUE ANSWER : ? YOUR ANSWER : ?
In a shell and tube heat exchanger having triangular pitch, the shell side equivalent diameter is given by 4(0.86p² - πd²)/πd (p² - πd²/4)/πd 4(0.86p² - πd²/4)/πd (4p² - πd²/4)/πd TRUE ANSWER : ? YOUR ANSWER : ?
In a heat exchanger, shell side fluid velocity can be changed by changing the tube Layout Neither A nor B Pitch Both A & B TRUE ANSWER : ? YOUR ANSWER : ?
The ratio of volumes of the mixed reactor to the plug flow reactor (for identical feed composition, flow rate, conversion, and for all positive reaction orders) is always < 1 >1 1 Equal to the order of reaction TRUE ANSWER : ? YOUR ANSWER : ?
Rotary driers are most economically designed for the number of heat transfer units (HTU) from 1.5 to 2.5 0.01 to 1 10 to 20 5 to 10 TRUE ANSWER : ? YOUR ANSWER : ?