Mechanical Operations Quiz 5
1 / 50
Run of mine (ROM) coal is crushed by a ___________ for use in domestic ovens?
2 / 50
Moore filter is a _______ filter ?
3 / 50
Pulverised coal passing through 200 mesh screen has a diameter of 0.074 mm (74 micron). The same passing through 50 mesh screen will have a dia of _____ mm?
4 / 50
Pick out the wrong statement?
5 / 50
Particle size range in which dust catcher (gravity settling chamber) works most effectively and efficiently is _______ microns?
6 / 50
Molten ammonium nitrate is mixed with ground limestone in fertilizer plant in a___________?
7 / 50
Number of particles in a crushed solid sample is given by (where, m = mass of particles in a sample, Vp = volume of one particle, ?= density of particles) ?
8 / 50
Percentage of drum submerged in the slurry in case of rotary drum filter is _________?
9 / 50
Raw materials are charged in the iron blast furnace using______?
10 / 50
Rittinger?s crushing law states that_______?
11 / 50
Pick out the correct statement?
12 / 50
Pick out the wrong statement pertaining to the roll crushers?
13 / 50
Pine oil and Cresylic acid are used as _______ in the froth floatation process?
14 / 50
Power consumption during turbulent flow in agitation tank is proportional to the _______ of the liquid?
15 / 50
Pick out the wrong statement ?
16 / 50
Reciprocating screens are normally inclined at an angle of 5? with the horizontal and employ gyratory motion at feed end & reciprocating motion at the discharge end. They are not suitable for the screening of the _____?
17 / 50
18 / 50
Ore concentration by jigging is based on the difference in the _______ of the particles?
19 / 50
Mixing of light fine powder such as insecticides is done by______?
20 / 50
21 / 50
Pine oil used in froth floatation technique acts as a/an_______?
22 / 50
Reciprocal of sphericity is termed as the_________?
23 / 50
Mixing mechanism employed in a pan mixer is by _________?
24 / 50
Pick out the material having minimum Rittinger?s number?
25 / 50
Pick out the correct statement ?
26 / 50
Sauter mean diameter is the same as the _______ mean diameter?
27 / 50
Optimum ratio of operating speed to critical speed of a trommel is_______?
28 / 50
Screen capacity is expressed in terms of______?
29 / 50
Mixing of plastic solids is generally facilitated by_____?
30 / 50
Moisture can be removed from lubricating oil using__________?
31 / 50
32 / 50
Pebble mills are tumbling mills widely used for grinding in the manufacture of paints & pigments and cosmetic industries, where iron contamination in the product is highly objectionable. Pebbles used in pebble mill are made of___________?
33 / 50
34 / 50
35 / 50
Ribbon blenders are exclusively meant for ___________?
36 / 50
Paddle agitator__________?
37 / 50
38 / 50
Rittinger number which designates the new surface produced per unit of mechanical energy absorbed by the material being crushed, depends on the ________?
39 / 50
Power required to drive a ball mill with a particular ball load is proportional to (where, D = diameter of ball mill.) ?
40 / 50
Pick out the wrong statement pertaining to the turbine agitator ?
41 / 50
42 / 50
Rod mills employed for grinding__________?
43 / 50
Out of the following size reduction equipments, the maximum feed size can be accepted by the___________?
44 / 50
Range of compressibility co-efficient of the commercial compressible cake obtained in filtration operation is_______?
45 / 50
Screen capacity is not a function of___________?
46 / 50
Removal of activated carbon from glycerine is done by __________?
47 / 50
48 / 50
Rittinger?s number designates the new surface created per unit mechanical energy absorbed by the material being crushed. Larger value of Rittinger?s number of a material indicates its_________?
49 / 50
Production rate ______ with increased fineness, with a given energy input to the size reduction machine?
50 / 50
Reduction ratio of crushers is the_____?
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