A. Hemispherical
B. Dished
C. Ellipsoidal
D. Conical
A. Practical limit reached, due to low heat transfer rate because of inadequate temperature
difference
B. Economic limit reached, when the plant cost exceeds the saving of steam
C. Both A. & B.
D. Neither A. nor B.
A. About 9
B. Considerably more than 9
C. Considerably less than 9
D. About 3
A. 5 cms
B. 40% of the I.D. of the shell
C. 25 cms
D. I.D. of the shell
A. Least radius of gyration
B. Axis of the load
C. Perpendicular to the axis of the load
D. None of these
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 dumg antifoaming agent through it
D. All A., B. and C.
A. Permits the use of less tubes in a given shell diameter
B. Facilitates comparatively easier external cleaning because of large clearance
C. Permits the use of more tubes in a given shell diameter
D. Both B. and C.