- (A) Height & properties of the liquid
- (B) Agitator type & speed of agitation
- (C) Size of agitator & the tank
- (D) All
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- (A) Aluminium
- (B) Stainless steel
- (C) Copper
- (D) Carbon steel
- (A) Ratio of true temperature difference to the LMTD
- (B) Ratio of LMTD to the true temperature difference
- (C) Differenced of true temperature difference and the LMTD
- (D) Geometric mean of the true temperature difference and the LMTD
- (A) 1.2
- (B) 0.5
- (C) 3.8
- (D) 6.8
- (A) Clearance between shell & baffles and between tube & baffles should be minimum to avoid by-passing of the fluid, but it should be enough to permit the removal of tube bundle
- (B) Baffles are supported independently of the tubes by tie rods and positioned by spacers
- (C) Tie rods are fixed at one end in the tube sheet by making blind holes and the minimum number of tie rods is 4 with at least 10 mm diameter
- (D) Bracket supports are used for horizontal shell, while saddle support is used for vertical shell
- (A) Liquid gradient on the tray
- (B) Lower skirt clearance
- (C) Lower static submergence
- (D) Small downcomer liquid seal
- (A) Equal to the impeller diameter
- (B) Twice the impeller diameter
- (C) Twice the tank diameter
- (D) 3/4 of the tank height
- (A) If sufficient residence time (around 8 seconds) is not provided to the downcoming liquid in the downcomer, it may entrain some vapour
- (B) The liquid head in the downcomer should not be greater than one half the plate spacing to avoid flooding
- (C) The discharge end of the downcomer must project far enough into the tray liquid so that no gas bubbles can enter the open end and by pass the bubble caps
- (D) None of these
- (A) Ferrule
- (B) Socket
- (C) Nipple
- (D) Saddle
- (A) Two
- (B) Five
- (C) Ten
- (D) Twenty
