Category: Process Equipment and Plant Design

A. Low gas velocity
B. High gas velocity
C. Excessive liquid gradient over the tray
D. Low reflux ratio

A. Higher
B. Lower
C. Same
D. Unpredictable

A. Results in higher shell side pressure drop
B. Can accomodate less number of tubes for a given shell diameter
C. Facilitates easier shell side cleaning; hence is more suitable for handling high dirt factor shell
side fluid
D. Creates relatively lower turbulence on the shell side resulting in lower shell side heat transfer
co-efficient

A. Baffle spacing
B. Clearance
C. Pitch
D. None of these

A. Plate efficiency increases with increase in superficial vapour velocity till entrainment limit
B. Increase in depth of the liquid about the slots increases the plate efficiency, particularly if the liquid depth is < 1"
C. Too small a plate spacing can cause a low efficiency, if the vapour velocity is greater than the allowable value
D. None of these

A. 30°
B. 45°
C. 60°
D. 75°

A. Need not be provided for non-pressure parts like tie rods, spacers, baffles, supports etc.
B. For carbon steel and cast iron pressure parts is 1.5 mm (except for tubes) and for severe
conditions it is 3 mm
C. For internal cover and tube sheet is provided on both the sides
D. All A., B. & C.

A. 0.2 D
B. 0.5 D
C. 0.66 D
D. 0.80 D

A. 6.5 cms
B. 6.5 mm
C. Equal to tube I.D
D. Equal to tube O.D

A. Preferably flow inside the tube for its easier internal cleaning
B. Preferably flow outside the tube
C. Flow at a very slow velocity
D. Flow outside the tube, when the flow is counter-current and inside the tube when the flow is
co-current