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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ratchet and pawl mechanism jack hammer drill GATE Mining Engineering 2020 mining engineering gate ratchet pawl prevents reverse rotation ratchet and pawl function GATE 2020 question 18 ratchet pawl prevents reverse rotation of drill

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