Mechanical Operations

141. For the transportation of ultrafine particles, the equipment used is a _________ conveyor.

1. Belt
2. Pneumatic
3. Screw
4. None of these

View answer

142. For transporting pasty material, one will use a/an

1. Apron conveyor
2. Belt conveyor
3. Screw conveyor
4. Bucket elevator

View answer

143. Froth floatation is the most suitable for treating

1. Iron ores
2. Sulphide ores
3. Quartzite
4. None of these

View answer

144. Gelatinous solid (which plug the septum) can be filtered by a _________ filter.

1. Sparkler
2. Plate and frame
3. Vacuum leaf
4. Pre-coat

View answer

145. General mechanism of size reduction in intermediate and fine grinder is by

1. Cutting action
2. Compression
3. Compression and tearing
4. Impact and attrition

View answer

146. Gold ore concentration is mostly done using

1. Jigging
2. Tabling
3. Froth floatation
4. Elutriation

View answer

147. Gravity settling process is not involved in the working of a

1. Hydrocyclone
2. Classifier
3. Dorr-thickener
4. Sedimentation tank

View answer

148. Gravity stamp mill is meant for the _________ crushing.

1. Primary
2. Intermediate
3. Fine
4. Ultrafine

View answer

149. Grindability of a material does not depend upon its

1. Elasticity
2. Hardness
3. Toughness
4. Size

View answer

150. Grinding characteristic of a material is given by its

1. HGI
2. Angle of repose
3. Shatter index
4. Abrasion index

View answer