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

View solution

Q. Ribbon blenders are exclusively meant for

View solution

Q. In closed circuit grinding as compared to open circuit grinding, the

View solution

Q. Pick out the correct statement.

View solution

Q. Separation of solid particles based on their densities is called

View solution

Q. Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator?

View solution

Q. __________ are mixed using ribbon blenders.

View solution

Q. During agitation of liquids, the

View solution

Q. For crushing of solids, the Rittinger's law states that the work required for crushing is proportional to

View solution

Q. Traces of liquid tar fog present in coke oven gas is separated using

View solution

Q. Close circuit grinding by a ball mill with air sweeping employs a

View solution

Q. Work index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size that 80% of product particles will pass through a 0.1 mm screen. The value of work index determined for wet grinding should be multiplied with __________ to get the same for dry grinding.

View solution

Q. Choke crushing (in case of a Jaw crusher) compared to free crushing

View solution

Q. The specific surface of sherical particles is proportional to (where, Dₚ = diameter of particle).

View solution

Q. Wheat is ground into flour in a

View solution

Q. Gravity stamp mill is meant for the __________ crushing.

View solution

Q. Washability curve based on float and sink test enables an assessment to be made of the possibility of cleaning a coal fraction based on the

View solution

Q. Toothed roll crushers achieve size reduction by

View solution

Q. Pick out the wrong statement:

View solution

Q. Soft & non-abrasive materials can be made into fines by

View solution