Hitachi Technical Support Engineer 2 Interview Questions and Answers

A motor is a device that converts electrical energy into mechanical energy. Its working principle is based on the interaction between a magnetic field and an electric current.

• Motors can be classified into different types such as DC motors, AC motors, stepper motors, etc.

• The working principle of a DC motor is based on the interaction between a magnetic field and an electric current, which produces a rotational motion.

• AC...read more

Elevators use various safety mechanisms to prevent accidents.

• Emergency brakes are installed to stop the elevator in case of a malfunction.

• Door interlocks prevent the doors from opening unless the elevator is at a stop.

• Overload sensors prevent the elevator from moving if it exceeds its weight limit.

• Safety edges on the doors detect obstructions and stop the doors from closing.

• Firefighters' emergency operation allows fire...read more