Machine Maintenance Engineer Interview Questions and Answers

AC and DC currents differ in terms of direction and usage. Basic electrical components include resistors, capacitors, inductors, and diodes.

• AC current changes direction periodically, while DC current flows in one direction constantly

• AC current is used for household appliances and power distribution, while DC current is used in batteries and electronic devices

• Basic electrical components include resistors (limit current flow), capacitors (store and release electrical energy), i...read more

Third angle projection is commonly used in India for engineering drawings.

• Third angle projection is the standard method used in India for representing 3D objects on 2D surfaces.

• In third angle projection, the object is imagined to be in the third quadrant (behind the viewing planes).

• This method is widely taught in engineering colleges and used in industries across India.

• It is important for machine maintenance engineers to be familiar with third angle projection for interpretin...read more

CNC machines can have 2, 3, 4, or 5 axes depending on the complexity of the machine.

• CNC machines can have 2 axes for simple operations like drilling and cutting along two axes.

• 3-axis CNC machines can move along three axes (X, Y, Z) allowing for more complex operations like milling.

• 4-axis CNC machines have an additional rotary axis, enabling the cutting tool to rotate and move along four axes.

• 5-axis CNC machines have two additional rotary axes, providing even more flexibility ...read more

A vernier is a type of scale used for precise measurements in engineering and machining.

• Vernier scales are used to measure small distances with high accuracy.

• They consist of a main scale and a sliding vernier scale that allows for interpolation of measurements.

• The working principle of a vernier involves aligning the zero marks of the main scale and vernier scale to obtain a precise reading.

• Vernier calipers and micrometers are common tools that utilize vernier scales for measu...read more