Mineral Processing Mid - I, September - 2014

1.Example for secondary crusher?
  • jaw crusher
  • gyratory crusher
  • Cone crusher
  • Hammer mill
Answer: B
2.Inblake type jaw crusher movebale jaw is hinged ………...of the crusher?
  • At the top
  • At the bottom
  • At the centre
  • None of the above
Answer: B
3.In a double –toggle type jaw crusher number of toggle plates is?
  • 1
  • 2
  • 3
  • 4
Answer: B
4.The faces of jaw ?
  • Convex
  • Concave
  • Either Flat or convex
  • none
Answer: C
5.The capacity of gyratory crusher?
  • 2500 to 3500 T
  • 1500T to 2500T
  • 1000T to 1500T
  • 4000T
Answer: A
6.The angle between jaws in jaw crusher ?
  • 25deg-28deg
  • 20deg-23deg
  • 23deg-26deg
  • none
Answer: B
7.Comminutioninvolves ?
  • Crushing
  • Grinding
  • Both crushing&grinding
  • None
Answer: C
8.Flatation is a process of ………?
  • Physico-chemical separation
  • Only physical separation
  • Only chemical separation
  • None
Answer: A
9.What is the size of heavy duty jaw crusher ?
  • 1650mm*2150mm
  • 1650mm*2550mm
  • 1670mm*2150mm
  • 1750mm*2550mm
Answer: A
10.Liberation of the valuable minerals from the gangue is
  • Concentration
  • Comminution
  • Tailings
  • Both A & B
Answer: B
11.The angle between jaw faces is……………………
Answer: NIP ANGLE
12.The motor RPM for jaw crusher is………………
Answer: 90
13.Reduction ratio for a jaw crusher is………………..
Answer: 1.8 TO 7
14.The particles of locked mineral and gangue are known as …………………
Answer: MIDLLINGS
15.……………………………. Is an important in the benification of iron ore.
Answer: MAGNETIC SEPARATION
16.The naturally occurring compound that has both physical and chemical properties is called……………………
Answer: MINERAL
17.Ratio of the size of feed to size of discharge…………………
Answer: REDUCTION RATIO
18.The gangue particles are handling at………………………….
Answer: TAILINGS
19.Separation depends on deferent surface properties of the Minerals……………
Answer: FROTH FLOATATION
20.Example for fine crusher is………………………
Answer: GRAVITY STAMP