Q. 23 The main cutting force acting on a tool during the turning (orthogonal cutting) operation of a metal is 400 N. The turning was performed using 2 mm depth of cut and 0.1 mm/rev feed rate. The specific cutting pressure (in N/mm) is (A) 1000 (C) 3000 (B) 2000 (D) 4000 Q. 25 In solid-state welding, the contamination layers between the surfaces to be welded are removed by (A) alcohol (C) water jet (D) (B) plastic deformation (D) sand blasting TA Q. 26 The integral (ydx-xdy) is evaluated along the circle x+1 = traversed in counter clockwise direction. The integral is equal to (A) 0 (C) - T 2 (B) - T 4 (D)