The buckling tendency of compression members is always in the direction of the _____________________?

A. 0.1 to 0.25
B. 0.3 to 0.5
C. 0.5 to 0.6
D. 0.65 to 0.80

A. < 30
B. < 7
C. > 7 20 < 50

A. Sieve plate
B. Packed
C. Bubble cap plate
D. None of these

A. 0
B. 1
C. 1

A. Providing a higher skirt clearance or a higher weir
B. Decreasing the number of rows of caps through which the liquid flows or by decreasing the
velocity of liquid flow past the caps or by reducing the distance along the tray through which
the liquid must flow
C. Using split flow, radial flow or cascade flow for column diameter large than 4 ft
D. All A., B. and C.

A. Hemispherical
B. Dished
C. Ellipsoidal
D. Conical