Hightech Next Engineering & Telecom Site Engineer Interview Questions, Process, and Tips

A DC machine is an electrical device that converts mechanical energy into direct current (DC) electrical energy.

• DC machine stands for Direct Current machine.

• It consists of two main parts: the stator and the rotor.

• The stator is the stationary part that houses the field windings.

• The rotor is the rotating part that contains the armature windings.

• DC machines can operate as generators or motors.

• In generator mode, mechanical...read more

Synchronous machines have a constant speed while induction machines have a variable speed.

• Synchronous machines have a rotor that rotates at the same speed as the stator magnetic field

• Induction machines have a rotor that rotates at a speed slightly less than the stator magnetic field

• Synchronous machines are used in applications where constant speed is required, such as power generation

• Induction machines are used in appl...read more

A thyristor is a semiconductor device that acts like a switch and can handle high voltage and current.

• It has three terminals: anode, cathode, and gate

• It can be turned on by applying a small current to the gate

• Once turned on, it will remain on until the current through it drops below a certain level

• It is commonly used in power control applications such as dimmer switches and motor speed control

• Examples include silicon-c

Earthing is the process of connecting the non-current carrying part of electrical equipment to the earth. Grounding is the process of connecting the current carrying part of electrical equipment to the earth.

• Earthing is done to protect people from electric shocks.

• Grounding is done to protect electrical equipment from damage due to lightning strikes or power surges.

• Earthing is achieved by connecting a wire from the non-...read more