Interview Questions and Answers

A house hold electrical equipment circuit diagram shows the electrical connections and components of the equipment.

• The circuit diagram includes symbols for components such as resistors, capacitors, and switches.

• It shows the flow of electricity through the equipment.

• It helps in troubleshooting and repairing the equipment.

• Examples include diagrams for a refrigerator, washing machine, and air conditioner.

Creep is the gradual deformation of a material under constant stress over time.

• Creep occurs in materials that are subjected to high temperatures and constant stress.

• It is a time-dependent phenomenon and can result in permanent deformation or failure of the material.

• An example of creep is the deformation of a metal beam under constant load over a long period of time.

• Creep can be minimized by using materials with higher strength and stiffness, reducing the stress and temperatur...read more

Motors are classified based on their power source, construction, and application.

• Motors can be classified as AC or DC motors based on their power source.

• Based on construction, motors can be classified as brushed or brushless motors.

• Motors can also be classified based on their application, such as servo motors, stepper motors, etc.

• Other classifications include synchronous and asynchronous motors, single-phase and three-phase motors, etc.

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

Thermocouple is a temperature sensor that measures temperature by the voltage produced by two different metals.

• Consists of two different metals joined together to form a junction

• When the junction is heated, a voltage is produced

• The voltage produced is proportional to the temperature difference between the junction and the other end of the thermocouple

• Used in industries to measure temperature in furnaces, boilers, etc.

The RPM of the minute hand is 1/60th of the RPM of the hour hand.

• The minute hand completes one revolution in 60 minutes

• The hour hand completes one revolution in 12 hours

• The RPM of the minute hand is 1/60th of the RPM of the hour hand