A. Overall plate efficiency
B. Murphree plate efficiency
C. Point efficiency
D. None of these
Related Mcqs:
- In case of bubble cap distillation column of diameter greater than 1.2 metres, the cap diameter is roughly about _______________ cms?
A. 10
B. 20
C. 30
D. 35 - Smaller sized packings are generally dumped to the packed columns, and the large ones of size greater than ______________ mm are stacked individually, which provides better control over bed porosity and offers lower gas pressure drop?
A. 25
B. 50
C. 75
D. 150 - Any shell opening greater than 5 cms for a storage tank must be reinforced for reason of ____________________?
A. Preventing the local overstressing of the shell around the opening
B. Reduction of discontinuity in shape at the junction
C. Making the joint leak proof
D. None of these - For identical operating conditions, the pressure drop over _______________ tray is the highest out of the following?
A. Sieve
B. Valve
C. Counter flow
D. Bubble cap - 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 - Which of the following factors affect the pressure drop in a co-current gas-liquid absorption packed tower ?
A. Size, shape, orientation and surface of the packing particles
B. Density and viscosity of fluids
C. Fluid flow rates
D. All A., B. and C. - Which of the following is used to set the diameter of the distillation column ?
A. Number of theoretical plates
B. Static submergence
C. Allowable vapour velocity
D. Length of straight rectangular weir on cross-flow tray - For a cylindrical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness ?
A. Hemispherical
B. Ellipsoidal (2 : 1)
C. Conical
D. Flat plate - Which of the following material is seldom used for pressure vessel construction ?
A. Rimmed still
B. Mild steel
C. Killed steel
D. Semi-killed steel - The centre to centre distance between two consecutive baffles in a shell and tube heat exchanger is called the baffle pitch or baffle spacing, which is more than 1/5th the I.D. of the shell. Which of the following is not a function of the baffles ?
A. To increase the residence time of shell side fluid
B. To provide support to the tube bundle
C. To reduce the induced vibration in the tubes
D. To increase the tube side heat transfer co-efficient by inducing turbulence
