chemical engineering MCQs – Page 84

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs

1661. Flash point of most vegetable oils is about _______________ C ?
0

A. 300

B. 100

C. 200

D. 50

1662. Presence of sodium tripolyphosphate (an additive) in synthetic detergent___________________?
0

A. None of these

B. Does not allow redeposition of dirt on the cleaned surface

C. Facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions)

D. Inhibits its corrosive effects

1663. Phenol formaldehyde resin is used as an adhesive in making__________________?
0

A. Laminates

B. Books

C. Card boxes

D. Furniture

1664. The commonly used solvent in supercritical extraction is_____________________?
0

A. Methyl ethyl ketone

B. Carbon dioxide

C. Carbon tetrachloride

D. Water

1665. Trinitrotoluene (TNT), an explosive, is made by the nitration of ____________________?
0

A. Nitrobenzene

B. Nitrotoluene

C. Benzene

D. Toluene

1666. ______________ is produced using molasses as the starting raw material ?
0

A. Dimethyl ether

B. Benzol

C. Methyl alcohol

D. Ethyl alcohol

1667. When the gas to be dissolved in liquid is a/an ___________________ then normally co-current adsorber are used?
0

A. Sparingly soluble gas

B. Mixture of two gases

C. Pure gas

D. Ideal gas

1668. Coffee is prepared from coffee beans by leaching with____________________?
0

A. Naphtha

B. Hot water

C. Dilute hot caustic solution

D. Cold water

1669. Which is not concerned directly with mass transfer ?
0

A. Lewis relationship

B. Froude number

C. Sherwood number

D. Schmidt number

1670. Which of the following is not produced on commercial scale from sea water ?
0

A. Potassium compounds

B. Magnesium compounds

C. Bromine

D. Sodium sulphate

1671. Sudden temperature fluctuation does not affect pyrex glass, because of its __________________?
0

A. Low co-efficient of expansion

B. High co-efficient of expansion

C. High melting point

D. Both B. and (C)

1672. Sea weeds are an important source of_________________?
0

A. Bromine

B. Iodine

C. Fluorine

D. Chlorine

1673. Drying of a wet solid under constant drying conditions means the exposure of the wet solid to the air of constant______________________?
0

A. All A., B. & C.

B. Velocity

C. Humidity

D. Temperature

1674. Moisture in a solid exerting an equilibrium vapour pressure equal to that of the pure liquid at the same temperature is called the ___________________ moisture ?
0

A. Bound

B. Critical

C. Free

D. Unbound

1675. Oils and fats are converted to soap in a process called _________________?
0

A. Saponification

B. None of these

C. Esterification

D. Hydrogenation

1676. Free alkali in a toilet soap is _______________ that in a laundry shop ?
0

A. Less than

B. Same

C. More than

D. None of these

1677. Rayleigh equation applies to _________________ distillation ?
0

A. Molecular

B. Equilibrium

C. Differential

D. Flash

1678. The equation, NA = (DAB . Pt /RTZ) (y1 y2) is for _______________________?
0

A. Steady state equimolar counter diffusion

B. Steady state diffusion for stagnant case

C. Ficks first law of diffusion

D. Liquid M.T.C. by penetration theory

1679. With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide________________?
0

A. Decreases

B. Increases linearly

C. Increases

D. Decreases linearly

1680. For water-ethanol system, the minimum reflux ratio_____________________?
0

A. Is computed from the intercept of the operating line

B. Cannot be computed

C. Is computed from the slope of the upper operating line that is tangent to the equilibrium curve

D. Is the optimum reflux ratio

Previous Next

Showing 1661 to 1680 of 8709 mcqs