Testing Operator Interview Questions and Answers

Three phase wire colour code is a standard set of colors used to identify the different phases in a three-phase electrical system.

• In North America, the standard color code for three-phase wires is black, red, and blue.

• In Europe and most other parts of the world, the standard color code is brown, black, and gray.

• The purpose of the color code is to easily identify the different phases and ensure proper connection and safety in electrical systems.

Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

• Ohm's law is a fundamental law of electrical engineering.

• It states that the current through a conductor between two points is directly proportional to the voltage across the two points.

• The relationship between voltage, current, and resistance is given by V = IR, where V is voltage, I is current, and R is resistance.

• Ohm's law is used to calcula...read more

A motor is a device that converts electrical energy into mechanical energy, while a generator is a device that converts mechanical energy into electrical energy.

• Motor: Converts electrical energy into mechanical energy (e.g. electric fan)

• Generator: Converts mechanical energy into electrical energy (e.g. hydroelectric power plant)

Kritch of law refers to a legal principle or rule that is considered outdated or no longer relevant.

• Kritch of law may refer to a law that is no longer enforced or followed due to changes in society or legal interpretation

• It can also refer to a legal principle that is widely criticized or considered unjust

• Examples include laws prohibiting certain outdated practices or beliefs, such as witchcraft trials or dueling

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

• Capacitors are used to filter out noise in electronic circuits.

• They can store energy and release it quickly when needed.

• Capacitors are commonly used in power supplies, audio equipment, and electronic devices.

• Examples include ceramic capacitors, electrolytic capacitors, and tantalum capacitors.

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

• Transformers consist of two coils of wire, known as the primary and secondary coils.

• The primary coil is connected to a power source, creating a magnetic field when current flows through it.

• This magnetic field induces a voltage in the secondary coil, transferring energy from the primary to the secondary circuit.

• Transformers are commonly used in power distri...read more