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Mechanical Operations Quiz 3

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Mechanical Operations Quiz 3

1 / 50

Filtrate flow rate in case of a rotary drum vacuum filter (in which Rm < < Rc) is proportional to _____ and the cycle time (where, ? = filtrate viscosity Rm = filter medium resistance Rc = cake resistance)?

2 / 50

Filtration of water in a paper mill is done by a/an ________ filter?

3 / 50

General mechanism of size reduction in intermediate and fine grinder is by ___________?

4 / 50

For spheres, the specific surface shape factor is given by_____?

5 / 50

Filtration rate through a filter cake is proportional to (where, S = filtering surface R = specific cake resistance ? = viscosity of the filtrate) ?

6 / 50

Np ? 1/NRe choiceno C Short distance transportation of grain, gravel, sand, ash, asphalt etc. is done by using a _______ conveyor?

7 / 50

For classification of potable (drinking) water, we use a ________ filter?

8 / 50

For raschig rings, the sphericity is_______?

9 / 50

Gelatinous solid (which plug the septum) can be filtered by a ______ filter?

10 / 50

Gyratory crushers compared to the reciprocating jaw crushers___________?

11 / 50

For coarse reduction of hard solids, use ______?

12 / 50

For a cyclone of diameter 0.2 m with a tangential velocity of 15 m/s at the wall, the separation factor is___________?

13 / 50

Filtration capacity of a rotary drum vacuum filter depends upon the________?

14 / 50

Filter aid is used to______?

15 / 50

Gold ore concentration is mostly done using_____?

16 / 50

Fick?s law relates to__________?

17 / 50

Fluid medium used in the classification technique of mineral beneficiation is__________?

18 / 50

For the preliminary breaking of hard rock, we use a______?

19 / 50

Fibrous material is broken by a___________?

20 / 50

For separation of sugar solution from settled out mud, we use a _____ filter?

21 / 50

Grinding characteristic of a material is given by its_____?

22 / 50

For achieving maximum capacity of the ball mill, the ball charge should be equal to about _______ percent of the ball mill volume?

23 / 50

For laminar flow of filtrate through the cake deposited on septum, which of the following will be valid ?

24 / 50

Filtration operation carried out by continuous increase of the inlet pressure of slurry, is called the ______ filtration?

25 / 50

For spheres, the surface shape factor is given by (where, A = area, V = volume, and D = diameter) ?

26 / 50

Gravity stamp mill is meant for the _____ crushing?

27 / 50

Grindability of a material does not depend upon its_______?

28 / 50

For removal of very small amounts of precipitate from large volume of water, the most suitable filter is the _______ filter?

29 / 50

Flow of filtrate through the cake in a plate and frame filter press is best described by the _______ equation?

30 / 50

For sizing of fine materials, the most suitable equipment is a______?

31 / 50

Filtration should be stopped in a filter press, if the__________?

32 / 50

For transporting pasty material, one will use a/an___________?

33 / 50

For spheres, volume shape factor is given by______?

34 / 50

Froth floatation is the most suitable for treating ______?

35 / 50

For the transportation of ultrafine particles, the equipment used is a _____ conveyor?

36 / 50

Fluid energy mill comes in the category of_________?

37 / 50

Grinding efficiency of a ball mill is of the order of ________ percent?

38 / 50

General crushing equation is given by d(P/m) = -K (dD? S/D? n S). Bond?s crushing law is obtained by solving this equation for n = ______ and feed of infinite size?

39 / 50

For benefication of iron ore, the most commonly used method is_______?

40 / 50

Gravity settling process is not involved in the working of a_________?

41 / 50

Filter medium resistance is important during the _______ of filtration?

42 / 50

For Indian standard (IS) screens, the mesh number is equal to its aperture size expressed to the nearest deca-micron (0.01 mm). Aperture width of IS screen of mesh number 50 will be approximately ______ microns?

43 / 50

For crushing of solids, the Rittinger?s law states that the work required for crushing is proportional to ___________?

44 / 50

For efficient grinding, ball mills must be operated___________?

45 / 50

For a non-spherical particle, the sphericity___________?

46 / 50

For a sphere falling in the constant drag co-efficient regime, its terminal velocity depends on its diameter D. as__________?

47 / 50

Float and sink test determines the possibility of cleaning of coal by a process based on the_____?

48 / 50

Grizzlies are used for separating ______ solids?

49 / 50

Filtration rate does not depend upon the_________?

50 / 50

Filter medium resistance is that offered by the___________?

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