List of top Electrical Technology Questions on Electrical Machines

What is a Digital multimeter? Write its features and draw its schematic block diagram.

Explain the good handling technique of lifting heavy load manually at workplace.

Explain the construction, working, and uses of a capacitor-start capacitor-run single-phase induction motor.

Write possible faults that may occur in a Room Cooler and an Electric Geyser. How can these faults be removed?

Explain why a single-phase induction motor is not self-starting. What are the methods used to make it self-starting?

Mention general characteristics of DC shunt motor and its applications.

Which transformer is known as a single winding transformer?

Speed of motor used in electric mixer has ________ RPM.

The speed of motor or blower of room cooler is controlled by ________. (Selector switch Toggle switch)

Eddy current in dynamometer type wattmeter can be minimised by using ________ within the region of magnetic field. (Metallic parts Non-metallic parts)

The electromagnet is the main component of driving system of energy meter.

What is the other name for pressure type water heater?

How will you perform open circuit test?

Natural air cooling is used in transformers with ratings up to

The power rating of element used in electric geysers is between

Megger is used to measure ________.

Capacitor that is used in capacitor start motor is:

Explain the working principle of three-phase induction motor with its advantages.

Explain the construction and working principle of a room cooler. Draw a diagram of internal structure of a room cooler.

With the help of diagram, explain the working principle of capacitor start motor.

What are the advantages and disadvantages of Dynamometer wattmeter? Write the different types of Dynamometer wattmeters.

Why is starter necessary in DC motor? Explain its working in brief.

With the help of a diagram, explain the working of a universal motor.

With the help of diagram, explain basic construction and working principle of a transformer.

Write the main components of immersion heater.