VISA Steel ITI Electrician Interview Questions and Answers

Transformer maintenance involves regular inspection, testing, and servicing to ensure optimal performance and prevent breakdowns.

• Regularly inspecting for signs of wear and tear

• Testing insulation resistance to prevent short circuits

• Servicing cooling systems to prevent overheating

• Checking oil levels and quality for proper lubrication

• Cleaning and tightening connections for efficient operation

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.

• Examples of motors include electri

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 low maintenance requirements.

• VCBs are preferred over other types of circuit breakers in ap...read more

Ohm is the unit of electrical resistance in the International System of Units (SI).

• Ohm is represented by the symbol Ω.

• It is named after German physicist Georg Simon Ohm.

• One ohm is equal to the resistance of a conductor in which a current of one ampere is produced by a potential difference of one volt.

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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

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

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