Electrical Engineering XYZ MCQs
The correct relation between type of brush and their application is:
- Copper graphite → low voltage high current density
- Carbon brush → normal ratings
- Electro graphite → large ratings
- All of the above
Correct answer: 4. All of the above
Explanation: All of these is correct answer to this Electrical Engineering XYZ MCQ
- Copper Graphite Brushes:
- These brushes are typically used in applications where there is a requirement for low voltage and high current density.
- Copper graphite brushes are known for their ability to handle high current densities without significant wear. They are often used in high-performance electric motors, generators, and similar equipment where there’s a need for efficient current transfer at relatively low voltages.
- Carbon Brushes:
- Carbon brushes are widely used in various electrical applications with normal ratings.
- They are versatile and can be used in a wide range of applications including motors, generators, power tools, and industrial equipment. Carbon brushes are known for their durability, low friction, and good conductivity, making them suitable for normal to moderate electrical loads.
- Electro Graphite Brushes:
- Electro graphite brushes are typically used in applications with large ratings.
- These brushes are engineered to handle high voltages and currents efficiently over extended periods. They are commonly employed in high-power electrical equipment, such as large motors, industrial generators, and certain types of electrical machinery where high-performance and durability are crucial.
So, the statement “All of the above” accurately reflects the diversity of brush types and their respective applications in electrical systems. Each type of brush is tailored to suit specific requirements regarding voltage, current density, and overall performance, making them suitable for a wide range of applications across different industries.