Question
a.
Froude number is independent for the curves between power number and Reynolds number in baffled system.
b.
Power number becomes independent of impellers Reynolds number at high Reynolds number, but is dependent on the geometry of the impeller.
c.
Froude number is used to account for the effect of surface (e.g., the centre vortex) on the power number.
d.
all (a), (b) and (c).
Posted under Basic Chemical Engineering
Interact with the Community - Share Your Thoughts
Uncertain About the Answer? Seek Clarification Here.
Understand the Explanation? Include it Here.
Q. During agitation of liquids, the
Similar Questions
Explore Relevant Multiple Choice Questions (MCQs)
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
Q. In constant pressure filtration,
View solution
Q. The critical speed of a trommel (N) is related to its dia (D) as
View solution
Q. Which of the following minerals is not subjected to magnetic separation method?
View solution
Q. Which of the following is not a revolving/tumbling mill used for size reduction?
View solution
Q. __________ mills fall in the category of tumbling mills.
View solution
Q. Capacity of flight conveyor in tons/hr is given by (where, W & D = width and depth of flight respectively in metre, V = speed of the conveyor in metre/second, ρ = bulk density of material in kg/m³)
View solution
Q. Which of the following is not a cutting machine?
View solution
Q. Weber number is significant and is concerned with the
View solution
Recommended Subjects
Are you eager to expand your knowledge beyond Basic Chemical Engineering? We've handpicked a range of related categories that you might find intriguing.
Click on the categories below to discover a wealth of MCQs and enrich your understanding of various subjects. Happy exploring!
