127. The thickness of segmental baffles (25 -35% cut truncated plates usually) is generally __________ the tube wall thickness.
129. 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.
131. Which tube arrangement in a heat exchanger would facilitate highest heat transfer rate?
133. With increase in pressure drop (for a given particle size), the dust collection efficiency of a cyclone separator will
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