Myunghwa Automotive Maintenance Engineer Interview Questions and Answers

Diesel generator works by converting diesel fuel into mechanical energy through combustion process.

• Diesel fuel is injected into the combustion chamber

• Fuel is ignited by compressed air

• The resulting explosion drives the piston, creating mechanical energy

• Mechanical energy is converted into electrical energy through a generator

• Diesel generators are commonly used as backup power sources in case of power outages

Transformers work on the principle of electromagnetic induction to transfer electrical energy from one circuit to another.

• Transformers consist of two coils of wire wrapped around a magnetic core.

• When an alternating current flows through the primary coil, it creates a magnetic field that induces a voltage in the secondary coil.

• This allows for the transfer of electrical energy from one circuit to another without a direct...read more

A DOL starter is a direct online starter used to start and stop motors without any speed control.

• DOL starter consists of a contactor, overload relay, and start and stop push buttons.

• The power diagram shows the connection of the three-phase supply to the contactor and motor.

• The circuit diagram shows the connection of the contactor, overload relay, and push buttons.

• When the start button is pressed, the contactor closes a...read more