Chemical Engineering Mcqs

For removal of very small amounts of precipitate from large volume of water, the most suitable filter is the ______________ filter?

• (A)  Plate & frame
• (B)  Shell & leaf
• (C)  Sand
• (D)  Rotary vacuum

Answer

Submitted By :Ali Uppal

Pulverised coal passing through 200 mesh screen has a diameter of 0.074 mm (74 micron). The same passing through 50 mesh screen will have a dia of ____________ mm?

• (A)  0.007
• (B)  0.30
• (C)  50
• (D)  0.014

Answer

Submitted By :Ali Uppal

____________ mills fall in the category of tumbling mills ?

• (A)  Ball and pebble
• (B)  Rod and tube
• (C)  Compartment
• (D)  All

Answer

Submitted By :Ali Uppal

____________ conveyor is the most suitable for long distance transportation of cold, nonabrasive granular/irregular shape/fine materials?

• (A)  Bucket
• (B)  Belt
• (C)  Screw
• (D)  Apron

Answer

Submitted By :Ali Uppal

A sand mixture was screened through a standard 10-mesh screen. The mass fraction of the oversize material in feed, overflow and underflow were found to be 0.38, 0.79 and 0.22 respectively. The screen effectiveness based on the oversize is_________________?

• (A)  0.50
• (B)  0.58
• (C)  0.68
• (D)  0.62

Answer

Submitted By :Ali Uppal

Run of mine (ROM) coal is crushed by a _________________________ for use in domestic ovens?

• (A)  Jaw crusher
• (B)  Hammer crusher
• (C)  Ball mill
• (D)  Tube mill

Answer

Submitted By :Ali Uppal

Sizing of very fine particles of the order of 5 to 10 microns is done by elutriation, which is a _____________ operation?

• (A)  Clarification
• (B)  Sedimentation
• (C)  Flocculation
• (D)  Classification

Answer

Submitted By :Ali Uppal

Ultra centrifuges are used for the separation of _____________ solid particles?

• (A)  Coarse
• (B)  Fine
• (C)  Colloidal
• (D)  Dissolved

Answer

Submitted By :Ali Uppal

Separation of materials into products based on the difference of their sizes is called___________________?

• (A)  Sizing
• (B)  Sorting
• (C)  Classification
• (D)  Flocculation

Answer

Submitted By :Ali Uppal

The sphericity of a cylinder of 1 mm diameter and length 3 mm is_________________?

• (A)  0.9
• (B)  0.78
• (C)  0.6
• (D)  0.5

Answer

Submitted By :Ali Uppal