Multiple Choice Question (MCQ)
Question: What is the purpose of square slot provided on the top of the pinion of a 3 jaw chuck is?
A.
To set chuck on machine
B.
To set the back plate on the machine
C.
To accommodate the chuck key
D.
To set the body of the chuck in spindle
Correct Answer: To accommodate the chuck key
Explanation
The point through which the Whole mass of the body acts, irrespective of the position of the body, is known as centre of gravity (briefly written as c.g.). The plane geometrical figures (like rectangle, triangle, circle etc.) have only areas but no mass. The centre of area of such figures is known as centroid or centre of gravity of the area of the body. It may be noted that every body has one, and only one, centre of gravity.
Centre of gravity of a rectangular body at the point of intersection of its diagonals.