Samsung C&T Electrical Supervisor Interview Questions and Answers

The Loto system stands for Lockout/Tagout, a safety procedure used to ensure that dangerous machines are properly shut off and not started up again during maintenance or servicing.

• Loto system involves locking the energy-isolating devices with individual lockout devices to prevent the machine from being turned on

• Tagout involves placing a tag on the locked device to indicate that it should not be operated

• Employees workin...read more

Factors that affect power in electrical systems.

• Resistance: higher resistance leads to lower power

• Voltage: higher voltage leads to higher power

• Current: higher current leads to higher power

• Power factor: lower power factor leads to lower power

• Load: heavier load leads to higher power consumption

• Temperature: higher temperature leads to lower power

• Frequency: higher frequency leads to higher power

• Wire size: smaller wire size...read more

The location is at XYZ Power Plant and the project name is Upgrade of Electrical Systems.

• Location: XYZ Power Plant

• Project Name: Upgrade of Electrical Systems

Motor starters are devices used to start and stop motors. There are several types of motor starters.

• Direct On Line (DOL) starters

• Star-Delta starters

• Soft starters

• Variable Frequency Drive (VFD) starters

• Auto-transformer starters

There are various types of motors used in electrical systems.

• AC motors: Induction motor, Synchronous motor

• DC motors: Shunt motor, Series motor, Compound motor

• Special motors: Servo motor, Stepper motor

• Single-phase motors: Split-phase motor, Capacitor-start motor

• Three-phase motors: Squirrel cage motor, Wound rotor motor

There are various types of generators including diesel, gas, wind, solar, and hydroelectric generators.

• Diesel generators are commonly used in industries and commercial buildings.

• Gas generators are used for backup power in residential areas.

• Wind turbines are used to generate electricity in areas with high wind speeds.

• Solar generators use photovoltaic cells to convert sunlight into electricity.

• Hydroelectric generators us...read more

There are two types of alternators: synchronous and induction.

• Synchronous alternators are used for power generation in large power plants and have a constant speed of rotation.

• Induction alternators are used in small power plants and have a variable speed of rotation.

• Synchronous alternators are more efficient and have a higher power factor than induction alternators.

• Induction alternators are cheaper and require less mai...read more

I have over 10 years of experience in the electrical field, including supervising teams on various projects.

• Managed and supervised electrical installation projects

• Ensured compliance with safety regulations and quality standards

• Trained and mentored junior electricians

• Troubleshooted and resolved electrical issues efficiently

• Collaborated with other departments to coordinate project timelines

A motor starter circuit diagram is used to start and stop an electric motor.

• Motor starters typically consist of a contactor, overload relay, and start/stop buttons.

• The contactor is used to switch the motor on and off.

• The overload relay protects the motor from overheating.

• The start/stop buttons are used to control the motor.

• The circuit diagram shows the connections between these components.