Q. What is the triple point of water?

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Q. How is Gibb’s phase rule defined?

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Q. Separation of single-phase solid regions from two-phase solid regions is done by _________

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Q. The point at which two liquidus lines meet is known as __ ________

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Q. Which reaction does this equation denote?

Liquid + Solid 1 → Solid 2

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Q. Which reaction does this equation denote?

Solid 1 + Solid 2 →Solid 3

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Q. Alloys containing 2.0-6.7% carbon are considered as __________

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Q. The existence of two or more crystal structures for any substance, depending on temperature, is known as _________

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Q. Pure iron exists in ________ allotropic forms.

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Q. What is the crystal structure of ϒ iron?

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Q. At what temperature range is δ iron stable?

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Q. Which of the following is applicable to α iron?

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Q. Which of the following is a nonmagnetic iron?

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Q. Cementite is magnetic up to ________

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Q. ___________ is a mixture of radial lamellae of ferrite and cementite.

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Q. ___________ is a eutectic mixture of α iron and Fe₃C.

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Q. The eutectic point in the iron-iron carbide phase diagram occurs at __________ weight % composition of carbon.

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Q. At what temperature does δ ferrite melt?

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Q. What is the solubility of α ferrite at 0°C?

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Q. What is the crystal structure of austenite upon heating?

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