20+ ITI Electrician Interview Questions and Answers for Freshers

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 Panels, Control Panels, and Motor Control Centers.

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, such as on/off switches, selector switches, and momentary swi...read more

Transformers work on the principle of electromagnetic induction to transfer electrical energy between circuits.

• Transformers operate based on Faraday's Law of Electromagnetic Induction.

• They consist of primary and secondary coils wound around a magnetic core.

• When alternating current flows through the primary coil, it creates a magnetic field.

• This magnetic field induces a voltage in the secondary coil, allowing energy transfer.

• Example: Step-up transformers increase voltage for l...read more

The color code of a 410 k ohm resistance is yellow, brown, black, and red.

• 410 k ohm is represented by yellow, brown, black, and red bands on a resistor

• Yellow represents 4, Brown represents 1, Black represents 0, and Red represents 2 zeros (x100)

• So the color code for 410 k ohm resistance is yellow, brown, black, red

I believe my skills and experience justify the salary, as I can contribute effectively to the company's success.

• My technical skills in electrical systems can enhance productivity.

• I have hands-on experience with troubleshooting, reducing downtime.

• I am committed to safety standards, minimizing risks and costs.

• My adaptability allows me to learn new technologies quickly.

AC motor power refers to the amount of electrical energy that can be converted into mechanical energy by an AC motor.

• AC motor power is measured in watts (W)

• It is calculated by multiplying the voltage, current, and power factor of the motor

• The power factor is a measure of how efficiently the motor converts electrical energy into mechanical energy

• AC motor power can be increased by increasing the voltage or current supplied to the motor

• Examples of AC motors include induction mot...read more

DG (Diesel Generator) uses diesel oil for fuel and lubrication, ensuring efficient operation and longevity.

• Diesel oil is the primary fuel used in DG sets for combustion.

• Lubricating oil is also used to reduce friction in engine components.

• Examples of diesel oil include ASTM D975 compliant fuels.

• Regular oil changes are essential for maintaining DG performance.

DC करंट म्हणजे एकसारखा प्रवाह, जो एकाच दिशेने वाहतो. याला स्थिर करंट असेही म्हणतात.

• DC करंट म्हणजे 'डायरेक्ट करंट', जो एकाच दिशेने वाहतो.

• उदाहरण: बॅटरी, सौर पॅनेल, आणि इलेक्ट्रॉनिक उपकरणे.

• DC करंटचा वापर साधारणतः कमी वोल्टेजच्या उपकरणांमध्ये केला जातो.

• याला स्थिर करंट म्हणूनही ओळखले जाते, कारण त्याची दिशा आणि आकार स्थिर असतो.

The question asks for circuit diagrams with problems.

• Identify the circuit diagrams provided

• Analyze the diagrams for any potential problems or errors

• Explain the problems and suggest possible solutions

• Provide examples of circuit diagrams with problems

Force Motors left due to strategic reasons

• Force Motors decided to exit the electric vehicle segment to focus on their core business of manufacturing commercial vehicles

• The company faced tough competition in the EV market and decided to re-strategize their business model

• Force Motors also faced challenges in terms of high battery costs and lack of charging infrastructure

• The company plans to re-enter the EV market with a new strategy in the future

ACB stands for Air Circuit Breaker, a device used to protect electrical circuits from overloads and short circuits.

• ACBs are used in high voltage applications to protect electrical circuits.

• They operate by detecting overloads and short circuits, interrupting the circuit.

• Examples include industrial power distribution systems and large commercial buildings.

• ACBs can be manually or automatically reset after a fault is cleared.

All types of electrical equipment refer to a wide range of devices used for generating, transmitting, and distributing electricity.

• Generators: devices that convert mechanical energy into electrical energy

• Transformers: devices that change the voltage of electricity for transmission

• Switchgear: equipment used to control, protect, and isolate electrical circuits

• Cables and wires: used for transmitting electricity from one point to another

• Lighting fixtures: devices used to provide ...read more

Maintenance work in power plant involves regular inspections, repairs, and upgrades to ensure smooth operation and safety.

• Regularly inspecting equipment for signs of wear and tear

• Performing routine maintenance tasks such as lubricating moving parts

• Repairing faulty equipment to prevent breakdowns

• Upgrading systems to improve efficiency and safety

• Following safety protocols to prevent accidents

• Keeping detailed records of maintenance work done

RCCB stands for Residual Current Circuit Breaker. It is a safety device that quickly disconnects the power supply when it detects a leakage current.

• RCCB is also known as a residual current device (RCD).

• It is used to protect against electric shock and fire caused by faulty wiring or appliances.

• RCCB works by comparing the current flowing in the live and neutral wires. If there is a difference, it means that some current is leaking to the ground and the RCCB trips.

• RCCB is common...read more

A DC motor is an electrical machine that converts direct current electrical energy into mechanical energy.

• DC motors are commonly used in various applications such as electric vehicles, robotics, and industrial machinery.

• They consist of a stator, rotor, commutator, and brushes.

• The direction of rotation can be changed by reversing the polarity of the input voltage.

• DC motors are classified into two types: brushed and brushless.

• Brushed DC motors are cheaper and simpler, but brush...read more

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

• MCB is a type of circuit breaker that is commonly used in residential and commercial buildings.

• It is designed to protect electrical circuits from damage caused by overloading or short circuits.

• MCBs are available in different current ratings and can be easily reset after tripping.

• They are more reliable and faster in operat...read more

A control circuit diagram of a starter is a schematic representation of the electrical connections and components used to control the operation of a motor starter.

• The control circuit diagram typically includes a power source, control transformer, control devices such as push buttons and switches, and protective devices such as fuses and circuit breakers.

• The diagram also shows the connections between these components and the motor starter itself, including the main contacts an...read more

Megar, or megger, is an insulation resistance tester used to measure the resistance of electrical insulation.

• Measures insulation resistance in electrical systems.

• Helps identify potential insulation failures before they cause issues.

• Commonly used in testing cables, motors, and transformers.

• Example: A megger can test the insulation of a motor winding to ensure safety.

A DOL starter wiring diagram shows the connections for a Direct-On-Line starter used to start and stop motors.

• The main components of a DOL starter wiring diagram include a contactor, overload relay, start button, stop button, and power supply connections.

• The power supply is connected to the main terminals of the contactor, which then connects to the motor terminals.

• The start button is connected in parallel with the contactor coil to initiate motor start-up.

• The stop button is ...read more

Technical refers to specialized knowledge or skills in a particular field, often involving practical applications and problem-solving.

• Technical knowledge includes understanding electrical circuits, wiring, and safety protocols.

• Examples of technical skills for electricians include troubleshooting electrical issues and reading blueprints.

• Technical fields often require certifications or training, such as an ITI Electrician course.

• Technical documentation, like manuals and schemat...read more

Multimeter ek electronic device hai jo voltage, current, aur resistance measure karta hai.

• Multimeter do prakar ke hote hain: analog aur digital.

• Voltage measure karne ke liye, multimeter ko circuit me connect karna hota hai.

• Current measure karne ke liye, multimeter ko series me connect karna padta hai.

• Resistance measure karne ke liye, multimeter ko circuit se alag karna hota hai.

• Example: Digital multimeter se aap 12V battery ka voltage check kar sakte hain.