Chemical Engineering Basics - Study Mode

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[#161] Which of the following is a synthetic abrasive ?

(A) Corundum

(B) Emery

(C) Pumice

(D) Silicon carbide

Correct Answer

(D) Silicon carbide

[#162] Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?

(A) Cresylic acid

(B) Xanthaies

(C) Pine oil

(D) All of the above

Correct Answer

(B) Xanthaies

[#163] In __________ process, there is an increase in entropy with no degradation of energy.

(A) Isothermal expansion

(B) Isochoric heat addition

(C) Polytropic expansion

(D) Isobaric heat addition

Correct Answer

(A) Isothermal expansion

[#164] Wrought iron does not have

(A) Uniform strength in all directions

(B) Ability to hold protective coating

(C) High ductility & corrosion resistance

(D) Easily weldable characteristics

Correct Answer

(A) Uniform strength in all directions

[#165] Wrought iron does not have the

(A) Uniform strength in all directions

(B) Ability to hold protective coating

(C) High ductility & corrosion resistance

(D) Easily weldable characteristics

Correct Answer

(A) Uniform strength in all directions