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.Management Sciences
Category: CHEMICAL ENGINEERING
Response of a system to a sinusoidal input is called _____________ response?
A. Impulse
B. Unit step
C. Frequency
D. None of these
Narrow coke ovens as compared to wider coke ovens_________________?
A. Produce smaller coke
B. Produce stronger coke
C. Require less time of carbonisation
D. All A., B. and C.
Mc Cable Thiele method used for finding theoretical stages in a distillation column assumes that the_____________________?
A. Sensible heat differences are small, because the temperature changes from tray to tray is small
B. Trouton’s rule is applicable
C. Liquid/vapor loading across the column remains constant
D. All A., B. and C.
Main constituent of phosphate rock is_____________________?
A. Ammonium phosphate
B. Flour apatite
C. Calcium fluoride
D. Calcium phosphate
Fuel oil is subjected to visbreaking to reduce its_______________?
A. Pour point
B. Viscosity
C. Pressure drop on pumping
D. All A., B. and C.
Most commonly used crude heater before the fractionation tower in a refinery is the ______________ heater?
A. Electric immersion
B. Pipestill
C. Steam coil
D. None of these
What is the geometric mean of two heat transfer areas A1 and A2 ?
A. √(A1 . A2)
B. √(A1 + A2)
C. ½ √(A1 . A2)
D. 2 √(A1 . A2)
1 gm mole of methane (CH4) contains_________________?
A. 6.02 × 1023 atoms of hydrogen
B. 4 gm atoms of hydrogen
C. 3.01 × 1023 molecules of methane
D. 3 gms of carbon
Pick out the wrong statement ?
A. A soft magnetic material should have high permeability and small area of hysteresis loop
B. Poisson’s ratio of high melting point metals is more than unity
C. Solders generally melt at less than 185°C
D. Steel produced by B.O.F process is ideally suited for manufacturing flat product
In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for _______________ fibres?
A. Polythene
B. PVC
C. Rayon
D. Polyvinyl acetate
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