Q. Rapid quenching of eutectoid steel ___________ transforms the austenite into martensite.

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Q. Hot-quenching of eutectoid steels in austenitic condition results in formation of ___________

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Q. Bainite in iron-carbon alloys has a ___________ structure.

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Q. Lower bainite is formed at ___________ temperature range.

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Q. Which of the following factors do not affect the critical cooling rate?

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Q. For hardening of steel by quenching, the steel is cooled in __________

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Q. The cooling rate must be _________ the critical cooling rate for hardening of steel by quenching.

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Q. Phase transformation during hardening transforms _________

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Q. The slip does not occur in martensite due to the presence of _______ in the lattice.

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Q. The hardening process is carried out on ________ steel.

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Q. How does the rate of cooling affect the hardness of steel?

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Q. How does the size of the specimen affect the hardness of steel?

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Q. ___________ is defined as the ease of forming martensite.

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Q. Hardenability of a material can be measured using __________ test.

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Q. Which of the following factors affect the hardenability of a material?

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Q. Quenching of the sample in Jominy end-quench method is done at _______

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Q. Hardness readings are taken every ________ after quenching in Jominy end-quench test.

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Q. Which of the following is not a result of tempering?

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Q. Tempering of martensite steel is done _________

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Q. Internal stresses in martensite steel are relieved by heating at __________

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