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.Management Sciences
Category: CHEMICAL ENGINEERING
Which of the following is not a batch drier ?
A. Truck drier
B. Agitated pan drier
C. Fluidised bed drier
D. Vacuum shelf drier
Pick out the wrong statement?
A. Benzopyrene which causes cancer is present in traces in tobacco, charcoal & petrol driven
automobile exhaust
B. NO2 is capable of penetrating the troposphere and can absorb both ultraviolet & visible light
C. Hydrocarbon pollutants are produced by sweet gum, oak & natural rubber trees
D. H2S is not at all produced during combustion of sulphur bearing fuels as all the sulphur is
oxidised to SO2
A solid is being dried in the linear drying rate regime from moisture content Xo to XF. The drying rate is zero at X = 0 and the critical moisture content is the same as the initial moisture Xo. The drying time for M = (Ls/ARc) is (where, L = total mass of dry solid, A = total surface area for drying Rc = Constant maximum drying rate per unit area X = moisture content (in mass of water/mass of dry solids))_____________?
A. M(Xo – XF)
B. M(Xo/XF)
C. M ln(Xo/XF)
D. MXo ln(Xo/XF)
Circular cross section machine parts which are symmetrical about the axis of rotation are made by hot_____________________?
A. Piercing
B. Spinning
C. Drawing
D. Extrusion
Filtration capacity of a rotary drum vacuum filter depends upon the_______________?
A. Cake thickness
B. Characteristics of the feed slurry
C. Both A. & B.
D. Neither A. nor B.
With the increase in depth, the hydrostatic pressure in an un-accelerated incompressible fluid (in a constant gravitational field) ?
A. Decreases
B. Increases linearly
C. Increases exponentially
D. Remain constant
Bomb calorimeter can be used to determine the _____________ of the coal?
A. Sulphur content
B. Calorific value
C. Both A. & B.
D. Neither A. nor B.
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