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- Electrical Engineering Materialselectrical-engineering-mcqs › electrical-engineering-materials
- Published
- 22 Dec 2018
- Last updated
- 28 May 2026
Explanation
Carbon bearings are preferred in cases where lubrication is difficult or impossible, where corrosive chemicals are present, and where high temperatures occur. Therefore, all of these conditions justify the use of carbon bearings.
More Electrical Engineering Materials MCQs
Practice related questions from the same subject.
- 1.Which factor primarily influences the concentration of minority carriers?
- 2.How does the electron current in the conduction band compare to the hole current in the valence band?
- 3.What is the band gap energy of germanium?
- 4.Which type of element, containing three valence electrons, is commonly used as a dopant in semiconductors?
- 5.Which material contains the lowest proportion of carbon?
- 6.How does the electrical conductivity of an extrinsic semiconductor change as the temperature rises?
- 7.Which of the following statements about holes is incorrect?
- 8.If the Hall coefficient of a substance is measured to be zero, what type of material is it most likely?
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