Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: Use of ball bearings between two moving parts of machine is a common practice. Reason: Ball bearings reduce vibrations and provide good stability.A) If both assertion and reason are true and the reason is the correct explanation of assertion.
B) If both assertion and reason are true but the reason is not the correct explanation of the assertion.
C) If assertion is true statement but reason is false.
D) If both assertion and reason are false.
Correct Answer: C
Solution :
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 oh 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. Hence, option (c) is true.
You need to login to perform this action.
You will be redirected in
3 sec
