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.Management Sciences
Category: Process Equipment and Plant Design
At the following point for a given packing and set of fluids, the pressure drop per metre of packed height, with variation in fluid rates and operating pressure____________________?
A. Increases
B. Decreases
C. Remain same
D. May increase or decrease depending upon the solubility of the gas in the liquid
In a shell and tube heat exchanger, tube side _______________ of the mass velocity?
A. Heat transfer co-efficient is proportional to 0.8th power
B. Pressure drop is proportional to the square
C. Both A. & B.
D. Neither A. nor B.
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
Safety valves are provided in chemical equipments to guard against excessive_________________?
A. Temperature
B. Pressure/pressure fluctuation
C. Turbulence
D. Noise
Tube height in a calandria type evaporator is normally less than _______________ metres?
A. 1
B. 2
C. 3.5
D. 5.5
A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator__________________?
A. Is economical in operation
B. Employs high velocity, high heat transfer rate and less heating surface requirement
C. Employs a centrifugal pump placed between external downtake from vapor drum and inlet to
tube bundle
D. Both B. & C.
A stuffing box is used for____________________?
A. Absorbing the contraction/expansion of pipeline due to temperature changes
B. Prevention of fluid leakage around moving parts
C. Facilitating smooth opening and closing of a valve
D. Reducing the resistance of fluid flow
Friction factor for turbulent flow in a new pipe is given by____________________?
A. f = 16/NRe
B. f = 0.04/(NRe)0.16
C. f = 0.22 NRe
0.5
D. f = 25/NRe
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