Mechanical Operations
Which of the following crushers can be considered as a combination of a jaw crusher and a roller crusher?

Rod mill
Fluid energy mill
Ball mill
Gyratory crusher

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Mechanical Operations
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

Heavy tonnages of rocks or gravel
Dry chemicals
Powdered food & granular materials
Light metal powder down upto 4 meshsize

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