Question

Use of ball bearings between two moving parts of a machine is a common practice. Ball bearings reduce vibrations and provide good stability

• A. If both assertion and reason are true and reason is the correct explanation of the assertion
• B. If both assertion and reason are true but reason is not the correct explanation of the assertion
• C. If assertion is true, but reason is false
• D. Both assertion and reason are false statements

Answer 1

Answer: (C)

If assertion is true, but reason is false

Answer 2

Ball bearings, also known as anti-friction bearings, are small metallic or ceramic spheres used to reduce friction between shafts and axles in a number of applications. Ball bearings are often used in a series to absorb the weight placed on a moving part, or in individual cases to reduce friction in axle assemblies. Most ball bearings are manufactured to meet very exacting standards of roundness, since any deformation can cause the moving parts to fail unexpectedly.