379. The wear on the cross slide or compound rest can be taken up by tightening the adjustable
A.Jigs
B.Plates
C.Gibs
D.Pins
380. The workpiece motion and tool motion respectively in vertical boring machine are
A.Stationary and rotational
B.Rotational and translational
C.Translational and rotational
D.Stationary and rotational with translational
381. Tubular gears are the gears used in
A.Milling machine to change direction of rotation by 90°
B.Lathe for reversing direction of rotation
C.Lathe for increasing/decreasing cutting speed
D.Lathe for cutting threads
382. In machine tools, chatter is due to
A.Free vibrations
B.Random vibrations
C.Forced vibrations
D.Self-excited vibrations
383. The usual ratio of forward and return stroke in shaper is
A.2 : 1
B.1 : 2
C.2 : 3
D.3 : 2
384. Half nut is connected with
A.Milling machine
B.Locking device
C.Jigs and fixtures
D.Thread cutting on lathe
385. Lathe bed is usually made of
A.Structural steel
B.Stainless Steel
C.Cast iron
D.Mild steel
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