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.Management Sciences
Category: Process Equipment and Plant Design
A ‘rupture disc’ is provided in chemical equipments as an accessory meant for ___________________?
0
A. Relieving excess pressure
B. Creating turbulence
C. Enhancing mixing rate
D. Avoiding vortex formation
For given number of passes, pitch & tube diameter, the maximum number of tubes that can be accommodated in a shell of tripled inside diameter will be ____________ times?
A. About 9
B. Considerably more than 9
C. Considerably less than 9
D. About 3
Large process vessels operating under extreme temperature and pressure conditions are normally clad/ lined with materials like stainless steel, aluminium, nickel & its alloys, copper & its alloys and titanium. The cladding thickness is generally about ______________ percent of the total thickness?
A. 1 to 5
B. 10 to 20
C. 30 to 40
D. 40 to 50
Ponchon Savarit method is based on the use of enthalpy concentration diagram, which contains the bubble point curve (saturated liquid curve), dew point curve (saturated vapour curve) and equilibrium tie lines. As compared to McCabe-Thiele’s method, this method_________________?
A. is more accurate in finding the number of equilibrium stages
B. accounts for the enthalpy changes in the process
C. Facilitates direct calculation of heat load on reboiler & condenser from, the diagram used in
this method
D. All A, B. & C.
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 equivalent diameter for pressure drop is _______________ that for heat transfer?
A. Smaller than
B. Greater than
C. Equal to
D. Not related with
Heat transfer co-efficient for a horizontal condenser as compared to a vertical condenser operating under similar conditions is_______________?
A. Same
B. Less
C. About 3 times
D. About 0.33 times
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