Godrej Jersey Refrigeration Technician Interview Questions and Answers

Current is the flow of electric charge in a circuit.

• Current is measured in amperes (A).

• It is the rate at which electric charge flows through a conductor.

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

• In a DC circuit, the current flows in one direction only.

• In an AC circuit, the current changes direction periodically.

• Current is caused by the movement of electrons or other charged particles.

• It is e...read more

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

• Transformers are used to increase or decrease the voltage in an electrical circuit.

• They consist of two or more coils of wire, known as windings, that are wound around a core made of magnetic material.

• The primary winding is connected to the power source, while the secondary winding is con...read more

A capacitor is an electronic component that stores and releases electrical energy.

• A capacitor consists of two conductive plates separated by an insulating material called a dielectric.

• When a voltage is applied across the plates, one plate accumulates positive charge while the other accumulates negative charge.

• Capacitors are commonly used in electronic circuits for energy storage, filtering, timing, and coupling.

• They ca...read more

A fuse is a safety device that protects electrical circuits from excessive current flow.

• A fuse is a small, thin wire or strip of metal that melts when excessive current flows through it.

• When a fuse melts, it breaks the circuit and prevents further flow of current, protecting the electrical equipment.

• Fuses are commonly used in electrical systems to prevent damage from short circuits or overloads.

• They are rated for speci...read more

AC and DC are two types of electrical current with different characteristics.

• AC stands for alternating current, while DC stands for direct current.

• AC periodically changes direction, while DC flows in one direction.

• AC is used for power transmission over long distances, while DC is used for electronic devices.

• AC can be easily converted to different voltages using transformers, while DC requires converters or inverters.

• Ex...read more

Single-phase and three-phase supply differ in the number of power lines and voltage waveform.

• Single-phase supply has one power line and a sinusoidal voltage waveform.

• Three-phase supply has three power lines and a balanced sinusoidal voltage waveform.

• Single-phase supply is commonly used in residential applications.

• Three-phase supply is used in industrial and commercial applications.

• Three-phase supply provides higher pow...read more

Kirchhoff's current law states that the total current entering a junction is equal to the total current leaving the junction.

• The sum of all currents entering a junction is equal to the sum of all currents leaving the junction.

• This law is based on the principle of conservation of charge.

• It is used to analyze circuits and determine unknown currents.

• For example, if a junction has three currents entering and two currents l...read more

The statement refers to Kirchhoff's Current Law which states that the sum of currents entering a node is equal to the sum of currents leaving the node.

• Kirchhoff's Current Law is a fundamental law in electrical engineering

• It is also known as Kirchhoff's First Law or KCL

• The law applies to any node in an electrical circuit

• The algebraic sum of currents entering the node is equal to the algebraic sum of currents leaving the...read more

Newton's third law states that for every action, there is an equal and opposite reaction.

• Newton's third law is also known as the law of action and reaction.

• It means that whenever an object exerts a force on another object, the second object exerts an equal and opposite force on the first object.

• For example, if you push a wall, the wall pushes back with an equal amount of force.

• This law is applicable to all types of for...read more