Workshop Technology MCQ Questions & Answers | Mechanical Engineering

Providing shear on the tool helps to reduce the cutting force in sheet metal operations.

When shear is provided, the cutting action takes place progressively rather than simultaneously over the entire area, thereby decreasing the amount of material being cut at any instant.

This progressive cutting lowers the cutting force, improves the quality of cut, and increases the tool life.

Hence, providing shear on the tool effectively reduces the cutting force required during the operation.

The edge of a steel plate cut by oxygen cutting will get hardened when the carbon content is More than 0.3 percent

In average work, the tolerance produced by investment casting method is ±0.05 mm

In blanking the punched out piece is used and called a blank; in piercing the punched out piece is scrap.
In blanking operation, the clearance is provided on punch.

Piercing is process in which punch operation cuts a hole/material by tearing operation from a final piece of sheet metal. Piercing is a blanking operation.
In piercing operation, the clearance is provided on die.

A chisel is a tool that has a long metal blade with a sharp edge at the end.
It is used for cutting and shaping wood and stone.
The cross-section of a chisel is usually Octagonal

Cores are used to Form internal cavities in the casting and Improve mould surfaceand used to Form a part of a green sand mould
core is a device used in casting and moulding processes to produce internal cavities and reentrant angles .
The core is normally a disposable item that is destroyed to get it out of the piece

Upset butt welding is a welding technique that produces coalescence simultaneously over the entire area of abutting surfaces or progressively along a joint, by the heat obtained from resistance to electric current through the area where those surfaces are in contact

The consumable electrode is used in MIG arc welding

The stress in the flange region during the deep drawing process is a combination of radial tensile drawing stress and a tangential compressive stress.
The blank-holder at the top of the workpiece exerts a compressive force at the upper surface of the blank during the drawing process.