Northern Coalfields ITI Electrician Interview Questions and Answers

Coordinate with site teams to ensure smooth operation of site activities.

• Regular communication with site teams to understand their needs and challenges

• Provide necessary support and resources to site teams

• Address any issues or conflicts that may arise among site teams

• Ensure all site activities are aligned with project timelines and goals

MCB stands for Miniature Circuit Breaker. It is a type of electrical switch that automatically shuts off the electrical circuit during an overload or short circuit.

• Types of MCB include Single Pole MCB, Double Pole MCB, Triple Pole MCB, and Four Pole MCB.

• Other types of electrical instruments include Voltmeter, Ammeter, Multimeter, Oscilloscope, and Earth Tester.

• Types of electrical panels commonly used are Distribution P...read more

AC and DC are two types of electrical current. There are several types of switches used in electrical circuits.

• AC stands for Alternating Current and DC stands for Direct Current.

• AC current changes direction periodically while DC current flows in one direction only.

• Types of switches include toggle switches, rocker switches, push-button switches, and rotary switches.

• Switches can be classified based on their function, suc...read more

1. Minicher circuits brekar

2. Motor protection circuits brekar

3. Last circuits Brekar

4. Earth leakage circuits brekar

A polyphase meter typically has three terminals.

• Polyphase meters are used to measure electrical energy in three-phase systems.

• These meters have three terminals, each corresponding to a phase (usually labeled as L1, L2, and L3).

• The three-phase system allows for more efficient power distribution and is commonly used in industrial and commercial settings.

• Examples of polyphase meters include electromechanical induction met

Rankine cycle is a thermodynamic cycle used in power plants to generate electricity.

• Rankine cycle is a closed-loop cycle that uses steam to generate power.

• The cycle consists of four processes: heating, vaporization, expansion, and condensation.

• The efficiency of the Rankine cycle can be improved by increasing the temperature and pressure of the steam.

• The Rankine cycle is commonly used in power plants to generate electri...read more

A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.

• Consists of two coils of wire, known as primary and secondary windings

• Works on the principle of electromagnetic induction

• Used to step up or step down voltage levels

• Commonly used in power distribution systems

• Examples include power transformers, distribution transformers, and instrument transformers

A motor is a device that converts electrical energy into mechanical energy to perform work.

• Motors are commonly used in various applications such as industrial machinery, household appliances, and vehicles.

• There are different types of motors including AC motors, DC motors, and servo motors.

• Motors consist of a rotor, stator, and various components such as windings, bearings, and brushes.

• The rotation of the motor is gener...read more

VCB stands for Vacuum Circuit Breaker, which is a type of circuit breaker that uses vacuum as the arc quenching medium.

• VCB is used to interrupt the current flow in a circuit by creating a gap between contacts where the arc is extinguished in a vacuum.

• It is commonly used in medium voltage power systems for its high reliability and fast interruption speed.

• VCBs require less maintenance compared to other types of circuit b...read more

MCB working principle is to automatically switch off the electrical circuit during abnormal conditions like overload or short circuit.

• MCB detects abnormal conditions like overload or short circuit

• When abnormal condition is detected, MCB trips and disconnects the circuit

• MCB can be manually reset after tripping

• MCB provides protection to electrical circuits and appliances

MCCB stands for Molded Case Circuit Breaker.

• MCCB is a type of circuit breaker that is enclosed in a molded case.

• It is designed to protect electrical circuits from overloads and short circuits.

• MCCBs are commonly used in industrial and commercial applications.

• Examples of MCCB brands include Siemens, Schneider Electric, and ABB.