The process where there is no reduction of material, only a modification in its geometry, is called

35) Which of the following operations involves straightening a curved sheet metal?

36) Which of the following is used for checking the external diameter of a cylindrical object?

37) What is the rolling resistance to the truck whose weight is 72,000 N and its co-efficient of rolling resistance is 0.019?

38) The electronic device that measures the proportion of oxygen (O2) in the gas or liquid is called