Chemical Engineering MCQs

6108 MCQs  (Page 160 of 611)

Attempt Chemical Engineering Quiz
Large quantity of silica gel is normally dried in a _________________ dryer?
A. Freeze
B. Through circulation
C. Rotary vacuum
D. Tray
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Mass transfer co-efficient is defined as__________________?
A. Flux = co-efficient/concentration difference
B. Co-efficient = flux/concentration difference
C. Flux=concentration difference/coefficient
D. None of these
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Unsaturated air (with dry and wet bulb temperatures being 35 and 25°C respectively) is passed through water spray chamber maintained at 35°C. The air will be__________________?
A. Cooled
B. Humidified
C. Both a. & b.
D. Dehumidified
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In case of cooling towers, the ratio of the rates of heat and mass transfer is indicated by the ______________ number ?
A. Lewis
B. Grashoff
C. Sherwood
D. None of these
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In an absorption column, the flooding velocity for random packing is ___________________ that for stacked/regular packing?
A. Greater than
B. Smaller than
C. Equal to
D. Either a., or b.; depends on the type of packing
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Though, theoretically the adsorption & desorption isotherms is expected to coincide but sometimes at least a part of the isotherms does not coincide and this phenomenon is known as adsorption hysteresis. In such cases, the desorption equilibrium pressure is ______________ that obtained for adsorption?
A. Lower than
B. Higher than
C. Same as
D. Either same or higher than
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In distillation where q is defined as the moles of liquid flow in the stripping section per mole of feed introduced, for saturated liquid feed____________________?
A. Q > 1
B. Q < 1
C. Q = 1
D. Q = 0
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With increase in temperature, the leaching rate increases due to__________________?
A. Decreased liquid viscosity
B. Increased diffusivity
C. Both a. and b.
D. Neither a. nor b.
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Large scale drying of wheat is done in a ________________ dryer?
A. Fluidised bed
B. Spouted bed
C. Tray
D. Vacuum rotary
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With increase in the mass velocity of the gas, the rate of drying during the constant rate period ______________, if the conduction and radiation through the solid are negligible ?
A. Increases
B. Decreases
C. Remain same
D. Increases linearly
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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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