Jack Hammer Drill: Ratchet & Pawl Mechanism | GATE Mining 2020 Q18

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Mining Engineering > GATE 2020 > Mining Machinery

The 'ratchet and pawl' mechanism in a jack hammer drill

A

forces down the piston.

B

provides a twisting force to the drill steel.

C

engages rifle bar with rifle nut.

D

prevents reverse rotation of rifle bar.

Correct : d

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