Workshop Technology MCQ Questions & Answers | Mechanical Engineering

The welding process used in joining mild steel shanks to high speed drills is Flash butt welding

For cutting brass, the hacksaw blade should have 14 teeth per 25 mm.

Arc welding is a fusion welding process where heat is generated to melt and join metals.

The electric arc is created between the electrode and the workpiece, which produces intense heat.

Voltage is responsible for initiating and maintaining the arc gap between the electrode and the workpiece.

Flow of current provides the energy required to sustain the arc and generate heat for melting the metal.

Contact resistance at the point of initial contact helps in momentarily generating heat, which assists in the arc initiation.

Therefore, all these factors — voltage, current flow, and contact resistance — contribute to producing the electric arc in arc welding.

Hence, the correct answer is Option D: All of these.

A file removes the metal during Forward stroke

Lancing is the operation of Cutting a sheet of metal through part of its length and then bending the cut portion.

Notching is the operation of Removal of metal to the desired shape from the edge of a plate

Upper Limit = 20.000 + 0.035 = 20.035
Lower limit = 20.000 - 0.025 = 19.975
Tolerance = Upper Limit - Lower limit
= 20.035 - 19.975
= 0.06

In forehand welding, the weld is made From right to left

A diamond pointed chisel is used for cutting V-shaped grooves

Spot welding is used for welding Lap joints in plates having 0.025 mm to 1.25 mm thickness