Alfanar Electric System Panel Wiring Technician Interview Questions and Answers

There are various types of CCTV cameras such as dome, bullet, PTZ, thermal, and covert cameras.

• Dome cameras are commonly used for indoor surveillance and have a wide-angle view.

• Bullet cameras are weatherproof and have a longer range than dome cameras.

• PTZ cameras can pan, tilt, and zoom to cover a larger area.

• Thermal cameras use heat signatures to detect movement and are often used in low-light environments.

• Covert camer...read more

CCTV stands for Closed Circuit Television. It is a system of video cameras used for surveillance and security purposes.

• CCTV cameras are commonly used in public places like banks, airports, and shopping malls.

• They can also be used in homes and businesses for security purposes.

• CCTV footage can be used as evidence in criminal investigations.

• The use of CCTV has raised concerns about privacy and civil liberties.

• Advancements...read more

DOL starter is a direct online starter used to start and stop the motor instantly.

• DOL stands for Direct Online.

• It is used to start and stop the motor instantly.

• It is the simplest and cheapest method of starting a motor.

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

• It is used for small motors up to 5 horsepower.

• It is not suitable for large motors as it causes a high starting current.

• Example...read more