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Air friction clamping is achieved by the movement of aluminium piston in a cylinder when | |
A. | piston will have close fitting in the cylinder so,that no air can pass from the circular contact between the two [Wrong Answer] |
B. | piston will have small circular clearance so that air can pass with hinderance [Correct Answer] |
C. | piston will have circular clearance so that air can pass freely [Wrong Answer] |
D. | none of the above [Wrong Answer] |