Chemical Engineering Mcqs

The ratio of the actual mesh dimension of Taylor series to that of the next smaller screen is_______________?

• (A)  2
• (B)  √2
• (C)  1.5
• (D)  √3

Answer

Submitted By :Ali Uppal

Sphericity is the ratio of the surface area of a spherical particle having the same volume as the particle to the surface area of the particle. Which of the following has the maximum value of sphericity ?

• (A)  Sphere
• (B)  Cube
• (C)  Cylinder (L/
• (D)  = 1)

Answer

Submitted By :Ali Uppal

Cumulative analysis for determining surface is more precise than differential analysis, because of the_______________?

• (A)  Assumption that all particles in a single fraction are equal in size
• (B)  Fact that screening is more effective
• (C)  Assumption that all particles in a single fraction are equal in size, is not needed
• (D)  None of these

Answer

Submitted By :Ali Uppal

Float and sink test determines the possibility of cleaning of coal by a process based on the___________________?

• (A)  Gravity separation
• (B)  Wettability
• (C)  Particle shape
• (D)  None of these

Answer

Submitted By :Ali Uppal

Which of the following is not a part of the Blake jaw crusher ?

• (A)  Hanger
• (B)  Check plates
• (C)  Toggles
• (D)  Pitman

Answer

Submitted By :Ali Uppal

Wet grinding in a revolving mill ______________ as compared to dry grinding ?

• (A)  Gives less wear on chamber walls
• (B)  Requires more energy
• (C)  Increases capacity
• (D)  Complicates handling of the product

Answer

Submitted By :Ali Uppal

A screen is said to be blinded, when the___________________?

• (A)  Over-sizes are present in undersize fraction
• (B)  Under-sizes are retained in oversize fraction
• (C)  Screen is plugged with solid particles
• (D)  Screen capacity is abruptly increased

Answer

Submitted By :Ali Uppal

Which of the following may prove unsuitable for filtering volatile liquids ?

• (A)  Pressure filter
• (B)  Gravity filter
• (C)  Centrifugal filter
• (D)  Vacuum filter

Answer

Submitted By :Ali Uppal

The most suitable equipment used to devulcanise rubber scrap and to make water dispersion & rubber solution is a __________________?

• (A)  Boundary mixer
• (B)  Propeller agitator
• (C)  Sharpies centrifuge
• (D)  None of these

Answer

Submitted By :Ali Uppal

To remove dirt from the flowing fluid, we use a ____________________?

• (A)  Coagulant
• (B)  Gravity settler
• (C)  Strains
• (D)  Clarifier

Answer

Submitted By :Ali Uppal