Mechenical Maintenance Interview Questions and Answers

The least count of a vernier caliper is the smallest measurement that can be read on the scale.

• The least count is determined by the number of divisions on the main scale and the vernier scale.

• It is calculated by dividing the smallest division on the main scale by the number of divisions on the vernier scale.

• For example, if the smallest division on the main scale is 0.1 mm and the vernier scale has 10 divisions, the least count would be 0.01 mm.

The least count of a micrometer is the smallest measurement that can be read on the micrometer scale.

• The least count of a micrometer is determined by the number of divisions on the thimble and the pitch of the screw.

• It is usually expressed in micrometers or millimeters.

• For example, if a micrometer has 50 divisions on the thimble and the pitch of the screw is 0.5 mm, then the least count would be 0.01 mm (0.5 mm / 50 divisions).

The porosity of metals can be eliminated to produce a strong and uniform structure.

• Porosity in metals can weaken their structure and cause defects.

• Eliminating porosity involves using techniques like welding, casting, or sintering.

• These techniques can produce a more uniform and dense metal structure.

• Examples of metals that benefit from porosity elimination include aluminum, steel, and titanium.

Mechanical working of metals involves processes like forging, rolling, and extrusion to shape and strengthen metals.

• Mechanical working of metals refers to the processes used to shape and strengthen metals.

• Common methods of mechanical working include forging, rolling, and extrusion.

• Forging involves shaping metal by applying compressive forces through hammering or pressing.

• Rolling is a process where metal is passed through rollers to reduce thickness or change shape.

• Extrusion i...read more