Chemistry Test Preparations On Mechanical Operations Part 1

Test Preparation on Chemistry Test Preparations On Mechanical Operations Part 1

1.

Short distance transportation of grain, gravel, sand, ash, asphalt, etc. is done by using a __________ conveyor.

1flight
2slat or drag
3ribbon
4screw

2.

The equivalent diameter of a particle is the diameter of the sphere having the same

1ratio of surface to volume as the actual volume.
2ratio of volume to surface as the particle.
3volume as the particle.
4none of these.

3.

Pick out the wrong statement.

1Recycled coarse material to the grinder by a classifier is termed as circulating load.
2Wear and tear in wet crushing is more than that in dry crushing of materials.
3Size enlargement (opposite of size reduction) is not a mechanical operation.
4A 'dust catcher' is simply an enlargement in a pipeline which permits the solids to settle down due to reduction in velocity of the dust laden gas.

4.

In continuous filtration (at a constant pressure drop), the filtrate flow rate varies inversely as the

1square root of the velocity.
2square of the viscosity.
3filtration time only.
4washing time only.

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