Chemical Engineering MCQs

6108 MCQs  (Page 177 of 611)

Attempt Chemical Engineering Quiz
In liquid extraction, if the selectivity is unity, then___________________?
A. Separation of the constituents is the most effective
B. No separation will occur
C. Amount of solvent required will be minimum
D. Solvent flow rate should be very low
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With the lowering of equilibrium pressure, at a given temperature, the amount of adsorbate on the adsorbent______________________?
A. Increases
B. Decreases
C. Remain same
D. Either a. or b., depends on the system
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Drying of a wet solid under constant drying conditions means the exposure of the wet solid to the air of constant____________________?
A. Humidity
B. Velocity
C. Temperature
D. All a., b. & c.
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The temperature of water cooled in cooling tower is always _________________ temperature of entering air?
A. More than the wet bulb
B. Less than the wet bulb
C. Equal to the wet bulb
D. Equal to the dry bulb
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The relation among various mass transfer co-efficients (M.T.C) for ideal gases is given by (where, Kc & Km are M.T.C. for equimolar counter diffusion with concentration & mole fraction respectively as the driving force. and, Kp= M.T.C. for diffusion of a gas through a stagnant inert gas with pressure as driving force) ?
A. Kc = kp = km
B. Kc = kp/rt = km . rt/p
C. Kc = kp . rt = km . rt/p
D. None of these
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Dimension of mass diffusivity is the same as that of_____________________?
A. Kinematic viscosity
B. Dynamic viscosity
C. Surface tension
D. Pressure
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For a single component absorber, the operating line is straight only when plotted in term of ______________ units?
A. Partial pressure
B. Mole ratio
C. Mole fraction
D. None of these
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The cooling effect in a cooling tower cannot be increased by_____________________?
A. Increasing the air velocity over the wet surfaces
B. Reducing the humidity of entering air
C. Lowering the barometric pressure
D. None of these
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Sodium bicarbonate is produced during soda ash manufacture using a _______________ tower?
A. Plate
B. Baffle
C. Packed
D. None of these
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Leaching rate is independent of the________________?
A. Agitation
B. Temperature
C. Particle size
D. None of these
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Word of the Day
26 Jul
Simultaneously
at the same time.
ایک ہی وقت میں، ایک ساتھ، بیک وقت

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