20+ Mst Electrician Interview Questions and Answers

Current is the flow of electric charge. Transformer rating in kVA is important as it determines the maximum power that can be transferred.

• Current is measured in amperes (A)

• Transformers are used to change the voltage level of an alternating current (AC) power supply

• Transformer rating in kVA is determined by the maximum power that can be transferred without exceeding the temperature limits of the transformer

• Higher kVA rating means the transformer can handle more power

• For exampl...read more

When fire breaks out, I immediately implement emergency protocols to ensure the safety of individuals and property.

• Assess the situation to determine the size and location of the fire

• Activate the fire alarm to alert others in the building

• Evacuate people to a safe location

• Use fire extinguishers or other firefighting equipment if safe to do so

• Call emergency services for assistance

• Ensure all individuals are safely evacuated and accounted for

DG stands for Diesel Generator and UPS stands for Uninterruptible Power Supply. Both are backup power sources used in case of power outages.

• DG is a standalone power generator that runs on diesel fuel and is used to provide backup power in case of power outages.

• UPS is an electrical device that provides emergency power to a load when the input power source fails.

• DG is commonly used in industries, hospitals, and large buildings where power outages can cause significant damage.

• UP...read more

DG stands for Diesel Generator, used as a backup power source. A transformer is an electrical device that transfers electrical energy between two or more circuits.

• DG (Diesel Generator) is a standalone power source that uses diesel fuel to generate electricity during power outages.

• Transformers are used to increase or decrease voltage levels in electrical circuits for transmission and distribution.

• Transformers can be step-up transformers (increasing voltage) or step-down transf...read more

Equipment and tools used by electricians

• Multimeter

• Wire strippers

• Pliers

• Screwdrivers

• Voltage tester

• Circuit tracer

• Fish tape

• Conduit bender

• Drill

• Sawzall

• Hammer

• Tape measure

Timing joining refers to the process of connecting electrical wires or components based on a specific timing sequence.

• Timing joining involves connecting electrical components in a specific order to ensure proper functioning.

• It is crucial in complex electrical systems where timing is essential for synchronization.

• Examples include connecting wires in a circuit board based on a predetermined timing sequence.

• It can also refer to joining components in a motor or machinery in a spe...read more

Transformers work on the principle of electromagnetic induction to transfer electrical energy from one circuit to another.

• Transformers have two coils of wire, a primary coil and a secondary coil, wrapped around a magnetic core.

• When an alternating current flows through the primary coil, it creates a magnetic field that induces a voltage in the secondary coil.

• The voltage in the secondary coil is proportional to the number of turns in the coil and the strength of the magnetic fi...read more

A circuit breaker is a device that automatically interrupts the flow of electric current in a circuit to protect against overcurrent or short circuit.

• Circuit breakers are designed to prevent damage to electrical equipment and reduce the risk of electrical fires.

• They work by detecting excessive current flow and quickly opening the circuit to stop the flow of electricity.

• Common types of circuit breakers include thermal, magnetic, and thermal-magnetic circuit breakers.

• Examples o...read more

A transformer is an electrical device that transfers electrical energy from one circuit to another through electromagnetic induction.

• Transformers are used to increase or decrease the voltage of an alternating current (AC) power supply.

• They consist of two coils of wire, known as the primary and secondary coils, which are wrapped around a magnetic core.

• When an AC voltage is applied to the primary coil, it creates a magnetic field that induces a voltage in the secondary coil.

• Tra...read more

Current is the flow of electric charge through a conductor.

• Current is measured in amperes (A).

• It is caused by the movement of electrons.

• The direction of current flow is from positive to negative.

• Current can be either direct current (DC) or alternating current (AC).

Voltage is the measure of electric potential difference between two points in a circuit.

• Voltage is measured in volts (V).

• It is the force that drives electric current through a circuit.

• Higher voltage means more energy is available to move electrons.

• Voltage can be either AC (alternating current) or DC (direct current).

ACB stands for Air Circuit Breaker and is used for protecting electrical circuits from overloads and short circuits.

• ACBs are commonly used in industrial and commercial buildings to protect electrical equipment.

• They automatically trip and disconnect the circuit in case of overcurrent or short circuit faults.

• ACBs can be manually operated or motorized for remote operation.

• Examples of ACB manufacturers include Schneider Electric, Siemens, and ABB.

VCB (Vacuum Circuit Breaker) is used for electrical protection in medium voltage power systems.

• Used for electrical protection in medium voltage power systems

• Operates by creating a vacuum to extinguish the arc when the circuit is broken

• Commonly used in industrial and commercial applications

A miter saw is a tool used for making precise angled cuts in wood or other materials.

• Miter saws are commonly used in carpentry and woodworking for cutting trim, molding, and framing materials.

• They have a rotating blade that can be adjusted to make cuts at various angles, typically between 0-45 degrees.

• Miter saws can also be used for making bevel cuts, where the blade tilts to create angled edges.

• Some common types of miter saws include compound miter saws, sliding compound mit...read more

Transformer parts include core, windings, insulation, and terminals.

• Core: Provides magnetic path for the transformer

• Windings: Conductors that carry current and create magnetic field

• Insulation: Prevents short circuits between windings

• Terminals: Connect transformer to external circuit

• Examples: Enameled copper wire for windings, silicon steel for core

Transformer work involves installing, maintaining, and repairing electrical transformers.

• Installing new transformers in buildings or industrial sites

• Performing routine maintenance on transformers to ensure they are functioning properly

• Repairing faulty transformers to restore functionality

• Testing transformers to ensure they are operating within specifications

Wiring full jankari refers to having complete knowledge about electrical wiring.

• Understanding different types of wiring such as knob and tube, aluminum, and copper wiring

• Knowledge of electrical codes and regulations for safe wiring practices

• Ability to troubleshoot wiring issues and make necessary repairs

• Skills in installing new wiring for residential or commercial buildings

• Awareness of proper grounding and bonding techniques

Motors can be connected in various ways depending on the application and requirements.

• Motors can be connected in series or parallel depending on the voltage and current requirements.

• Series connection increases the voltage but keeps the current the same, while parallel connection keeps the voltage the same but increases the current.

• It is important to follow the manufacturer's guidelines for proper motor connection to avoid damage or malfunction.

• Properly sizing the wire and usi...read more

Programmable Logic Controller

• PLC stands for Programmable Logic Controller

• Used in industrial automation to control machinery and processes

• Commonly used in manufacturing plants, power stations, and transportation systems