- (A) Plain carbon steel and cast iron parts are used
- (B) Wall thickness is > 30 mm
- (C) Material of construction is high alloy steel
- (D) Both
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- (A) 0.08 to 0.12 d
- (B) 0.02 to 0.05 d
- (C) 0.2 to 0.5 d
- (D) 0.5 to 0.6 d
- (A) Keep a check on the liquid gradient over the plate by direct visual observation
- (B) Give access to the individual trays for cleaning, maintenance and installation
- (C) Guard against foaming & entrainment by dumping antifoaming agent through it
- (D) All
- (A) The downcomer design and the residence time in the downcomer is almost same for sieve plate and bubble cap columns
- (B) Weir length for a bubble cap plate is the same as that for the sieve plate
- (C) Weir height for a bubble cap plate column is the same as that for a sieve plate column
- (D) Weir height in case of a bubble cap plate ranges from 50 to 150 mm and is higher than the sieve plate
- (A) Low gas velocity
- (B) High gas velocity
- (C) Excessive liquid gradient over the tray
- (D) Low reflux ratio
- (A) Welded
- (B) Screwed
- (C) Flanged
- (D) Brazed
- (A) Increases
- (B) Decreases
- (C) Remain same
- (D) May increase or decrease depending upon the plate spacing
- (A) Larger dia vessel
- (B) Smaller dia vessel
- (C) Larger dia long vessel
- (D) Strength of the vessel is same irrespective of the diameter
- (A) 0.99
- (B) 0.95
- (C) 0.80
- (D) 0.55
- (A) 1-5
- (B) 20-40
- (C) 100-150
- (D) 1000-1500
