Thickness of the frame of a plate and frame filter as compared to that of plates is___________________?

A. Less
B. Same
C. More
D. Either A. or B.

Diameter of the sieve tray column is determined by the_________________?

A. Lower limit of vapour velocity
B. Upper limit of the vapour velocity
C. Hole diameter of the sieve tray
D. Height of the plate spacing

Brass valves are usually made for pipe sizes ______________ inches?

A. ≤ 1
B. ≤ 2
C. > 2.5
D. > 3.5

Heat transfer co-efficient, hG(Kcal/hr.m2 .°C) and mass velocity of air, G (kg/hr.m2 ) for air flow parallel to the surface in case of constant drying rate in batch drying is related as hG = 0.0176G0.8. But when the flow of air perpendicular to the surface is encountered, this equation changes to ____________________?

A. hG = 1.004G0.37
B. 1.004G0.8
C. hG = 0.0176G0.37
D. 0.0176G1.37

The ratio of tube length to shell diameter in case of liquid shell and tube heat exchanger ranges from__________________?

A. 2 to 3
B. 3 to 5
C. 4 to 8
D. 6 to 12

For turbulent flow (NRe > 2100) of low viscosity fluid (μ > 20cp) in steel pipes, the optimum inside pipe diameter is given by(where, Q = fluid flow rate, ft3/sec, ρ = fluid density, lb/ft3 μ = fluid viscosity, centipoise Di = optimum inside pipe diameter, inches) ?

A. Di, opt = 3.9 Q0.45 ρ0.13
B. Di, opt = 3.9 Q0.45. μ0.95
C. Di, opt = 4.7 Q0.36. μ3.2ρ0.13
D. Di, opt = 3 Q0.36. μ0.88

For pipe flows, head is proportional to ______________ at constant capacity (where D = pipe diameter) ?

A. 1/D
B. 1/D2
C. 1/D5
D. D2

Which of the following types of reactors is the safest from operation point of view ?

A. A vapor phase reactor
B. Pot type reactor
C. A liquid phase reactor
D. A liquid phase catalytic reactor

A pressure vessel is said to be made of ‘thick’ shell, if the ratio of its diameter to wall thickness is_______________?

A. < 10
B. > 10
C. > 20
D. < 20

Steam economy is defined as the amount of evaporation per unit amount of steam used, while the capacity is the total evaporation obtained per hour. Use of multiple effects in evaporation ?

A. Increases capacity
B. Increases economy
C. Does not affect the capacity
D. Both B. & C.