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Chapter 3 MACHINING TIME MCQs

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1. . Machining time is represented by





2. . ts represents





3. . Normally, this material can be machined without coolant.





4. . It minimizes friction between tool and workpiece during machining.





5. . It reduces wear and heat between the mating parts of a machine.





6. . It is a best cutting oil but very expensive.





7. . Fixed oil is composed of.





8. . Soluble oils are known as





9. . For ferrous metals of medium hardness, the oil to water ratio for making water soluble cutting oil is.





10. . For medium grinding operations, the oil to water ratio for making water soluble cutting oil is.





11. . In threading, oil is used





12. . The expression for actual machining time is given by tm =





13. . The time spent in personal needs of the worker.





14. . Graphite powder is a





15. . Function of coolant is to





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