Not an Application of Forging

Forging is a metalworking process in which a metal is heated and then shaped by applying compressive force using a hammer, press, or die. It is commonly used in the manufacturing of various products that require high strength and durability. However, the application of forging may vary depending on the nature of the product. The option (D) Steel balls of ball bearings is not an application of forging. The reason being that steel balls of ball bearings are produced by a different process known as rolling.

Explanation

Rail Sections - Rail tracks used for trains are made from steel bars that are forged into specific shapes to withstand the heavy loads and stresses of the trains.

Chisels - Chisels used for cutting and shaping metal, wood, or stone are made by forging the metal into the required shape and then sharpening the edges.

Brake Pedal of an Automobile - The brake pedal of an automobile is made from forged steel to ensure that it can withstand the pressure applied by the driver's foot.

Steel Balls of Ball Bearings - Steel balls used in ball bearings are not made by forging. They are produced by a different process known as rolling where steel wire is fed into a machine that shapes and cuts the wire into small balls.

Conclusion

Forging is a popular metalworking process that is used in the manufacturing of various products that require high strength and durability. The option (D) Steel balls of ball bearings is not an application of forging as they are produced by a different process known as rolling.