1000+ Mechanical Operations Objective Type Questions and Answers Pdf - 2

Question: 6

Which of the following oxides is not present in hematite iron ore?

(A) manganese oxide

(B) cobalt oxide

(C) calcium oxide

(D) titanium oxide

Question: 7

To produce talcum powder, use

(A) pin mill

(B) jet mill

(C) hammer mill

(D) ball mill

Question: 8

______ are mixed using ribbon blenders.

(A) Thick pastes

(B) High viscosity liquids

(C) Dry powders

(D) Lumpy solids and low viscosity liquids

Question: 9

Ultrafine grinders operate principal by

(A) cutting action

(B) attrition

(C) impact

(D) slow compression

Question: 10

The porosity of a compressible cake is

(A) same throughout the thickness of cake

(B) maximum at the filter medium

(C) minimum at the upstream face

(D) minimum at the filter medium