For coarse reduction of hard solids, use ____________________?
For coarse reduction of hard solids, use ____________________?
A. Impact
B. Attrition
C. Compression
D. Cutting
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For a sphere falling in the constant drag co-efficient regime, its terminal velocity depends on its diameter D. as_________________?
For a sphere falling in the constant drag co-efficient regime, its terminal velocity depends on its diameter D. as_________________?A. d
B. √d
C. d2
D. 1/dColloidal mills are used for ______________ grinding?
Colloidal mills are used for ______________ grinding?A. Coarse
B. Intermediate
C. Fine
D. UltrafineSeparation of materials of the same density based on their sizes by using then-different rates of flow is called__________________?
Separation of materials of the same density based on their sizes by using then-different rates of flow is called__________________?A. Sorting
B. Sizing
C. Flocculation
D. ElutriationCritical speed of rotation, N (in rps – rotation per second) of a trammel is equal to (where, g = acceleration due to gravity = 9.81 m/sec2 and, r = radius of trammel, metre.) ?
Critical speed of rotation, N (in rps – rotation per second) of a trammel is equal to (where, g = acceleration due to gravity = 9.81 m/sec2 and, r = radius of trammel, metre.) ?A. (1/2π). √(g/r)
B. (1/π). √(g/r)
C. ½ √(g/r)
D. 2π. √(g/r)Two particles are called to be equal settling, if they are having the same ?
Two particles are called to be equal settling, if they are having the same ?A. Size
B. Specific gravity
C. Terminal velocities in the same fluid & in the same field of force
D. None of theseThe sphericity of a cylinder of 1 mm diameter and length 3 mm is_________________?
The sphericity of a cylinder of 1 mm diameter and length 3 mm is_________________?A. 0.9
B. 0.78
C. 0.6
D. 0.5