With increase in temperature drop (in a shell and tube heat exchanger), the LMTD correction factor, FT_________________?

A. Decreases very rapidly
B. Increases very rapidly
C. Remains constant
D. Increases linearly

Which of the following efficiencies can be greater than 100% ?

A. Overall plate efficiency
B. Murphree plate efficiency
C. Point efficiency
D. None of these

Liquid redistribution should be done in a packed tower packed with raschig rings every 6 metres or ______________ times the column diameter, whichever is lower?

A. 2.5-3.0
B. 5-7.5
C. 10-12.5
D. 15-20

In a cylindrical vessel subjected to internal pressure, the longitudinal stress ζL and the circumferential stress, ζn are related by___________________?

A. ζh = 2 ζL
B. ζh = ζL
C. ζh = ζL/2
D. No relation exists

The thermal stress in a metallic bar does not depend upon the_____________________?

A. Changes in temperature
B. Cross-sectional area
C. Both A. and B.
D. Neither A. nor B.

A binary liquid Azeotropic mixture has boiling point higher than either of the components, when it shows ______________ deviation from Raoult’s Law?

A. Positive
B. Negative
C. No
D. None of these

For a given design of bubble cap, the number of bubble caps to be used per tray is set by the _________________?

A. Allowable gas velocity through the slots
B. Plate spacing
C. Diameter of the column
D. All A., B. and C.

The normal range of velocity of water in pipes is _______________ m/sec?

A. 0.1-0.5
B. 1-2
C. 10-50
D. 15-30

Log mean temperature difference in case of multi-pass shell and tube heat exchanger is always_________________?

A. Less than arithmetic mean value
B. More than arithmetic mean value
C. More than geometric mean value
D. Both B. & C.

In distillation columns, bubble caps are held in place over trays by ________________?

A. Rivets
B. A hold down bar
C. Bolts
D. Both B. and C.