126. Mixing of light fine powder such as insecticides is done by
127. Run of mine (ROM) coal is crushed by a __________ for use in domestic ovens.
128. 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 ?
129. The unit of specific cake resistance is
130. Size reduction of asbestos and mica is done by
131. A pebble mill
132. The study on washability of coal is done by using the __________ technique.
133. Horsepower required for a roll crusher is directly proportional to its
134. A suspension of glass beads in ethylene glycol has a hindered settling velocity of 1.7 mm/s, while the terminal settling velocity of a single glass bead in ethylene glycol is 17 mm/s. If the Richardson-Zaki hindered settling index is 4.5, the volume fraction of solids in the suspension is
135. __________ conveyor is the most suitable for long distance transportation of cold, non-abrasive granular/irregular shape/fine materials.
136. The specific cake resistance for compressible sludges is a function of the pressure drop
137. Moisture can be removed from lubricating oil using
138. Tabling process used for separating two materials of different densities by passing the dilute pulp over a table/deck, which is inclined from the horizontal surface at an angle of about
139. Addition of filter aid to the slurry before filtration is done to ...... of the cake.
140. Which of the following terminology is not used for size reduction of materials to fine sizes or powders?
141. A tube mill as compared to a ball mill
142. Kick's law assumes that the energy required for size reduction is proportional to the logarithm of the ratio between the initial and the final diameters. The unit of Kick's constant is
143. Which of the following gives the crushing energy required to create new surface ?
144. In filtration, the use of 'filter aid' helps in
145. Which of the following is the oldest dynasty?
146. Gizzlies are used for separating __________ solids.
147. Which of the following clay mixing devices is vacuum operated for deairation of clay?
148. Pick out the material having minimum Rittinger's number.
149. __________ mills are termed as impactors.
150. In case of a revolving mill, wet grinding compared to dry grinding