Mechanical Operations Questions

• During agitation of liquids, the
• Pick out the wrong statement.
• In closed circuit grinding as compared to open circuit grinding, the
• Pick out the wrong statement.
• The most suitable filter for the removal of very small amount of precipitate from very large volumes of water is the __________ filter.
• Which of the following is not a revolving/tumbling mill used for size reduction?
• Gummy & sticky materials like molasses, sugar etc. are best transported/handled by using a __________ conveyor.
• Gravity stamp mill is meant for the __________ crushing.
• Ribbon blenders are exclusively meant for
• The opening of a 200 mesh screen (Taylor series) is
• During the washing of cake
• 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
• A fluid energy mill is used for
• Metallic wire mesh is used as a filtering medium for the separation of dust from dust laden gas in case of a/an
• In a size reduction crushing operation, feed size is 300 to 1500 mm while the product size is 100 to 300 mm. This is a case of the __________ crushing.
• Separation of solid particles based on their densities is called
• Soft & non-abrasive materials can be made into fines by
• The specific cake resistance for incompressible sludges is (where ΔP = pressure drop over cake)
• Paddle agitator
• Which of the following is a coarse crusher?