1) The study of metallographic includes ____
a. alloy constituents
b. failure analysis
c. metal structure
d. all of the above
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Answer
Explanation
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ANSWER: all of the above
Explanation:
No explanation is available for this question!
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2) In metallography, microscopic method provides information about _____
a. impurities in a metal
b. location and extent of segregation
c. uniformity of structure
d. all of the above
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Answer
Explanation
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ANSWER: impurities in a metal
Explanation:
No explanation is available for this question!
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3) In microscopy, which illumination parameter is used for producing images with dark non-flat structure and bright back ground?
a. Bright field illumination
b. Dark field illumination
c. Both a. and b.
d. None of the above
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Answer
Explanation
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ANSWER: Bright field illumination
Explanation:
No explanation is available for this question!
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4) What is meant by recalescence in cooling curves?
a. Time required for liquefying solid components
b. Time required for completely solidifying the casted components
c. The cooling curve formed due to latent heat of fission
d. Liberated heat increases temperature of an under cooled liquid metal during nucleation
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Answer
Explanation
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ANSWER: Liberated heat increases temperature of an under cooled liquid metal during nucleation
Explanation:
No explanation is available for this question!
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5) The cooling curve formed when a material is solidified due to latent heat of fusion is called as ______.
a. Undercooling
b. Solidification
c. Thermal arrest
d. Thermometry
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Answer
Explanation
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ANSWER: Thermal arrest
Explanation:
No explanation is available for this question!
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6) In monotropic system, transition of one polymorph to another is _____
a. reversible
b. irreversible
c. either a or b
d. none of the above
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Answer
Explanation
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ANSWER: irreversible
Explanation:
No explanation is available for this question!
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7) Which of the following photographic papers is used in sulphur printing technique?
a. Bronze bromide paper
b. Copper bromide paper
c. Silver bromide paper
d. None of the above
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Answer
Explanation
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ANSWER: Silver bromide paper
Explanation:
No explanation is available for this question!
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8) The rule used to determine composition of various phases in a phase diagram is _____
a. Gibb's phase rule
b. Lever rule
c. Both a. and b.
d. None of the above
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Answer
Explanation
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ANSWER: Lever rule
Explanation:
No explanation is available for this question!
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9) The process of lowering the temperature of a liquid below its freezing point is known as _____
a. supercooling
b. undercooling
c. both a. and b.
d. none of the above
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Answer
Explanation
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ANSWER: both a. and b.
Explanation:
No explanation is available for this question!
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10) Which of the following is an etching reagent used for carbon steels?
a. Nitric acid
b. Picric acid
c. Both a. and b.
d. None of the above
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Answer
Explanation
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ANSWER: Both a. and b.
Explanation:
No explanation is available for this question!
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