1) Stress strain curve is shown below. Beyond point B, metal undergoes
a. less elastic deformation and more plastic deformation
b. only elastic deformation
c. more elastic deformation and less plastic deformation
d. only plastic deformation
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Answer
Explanation
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ANSWER: only plastic deformation
Explanation:
No explanation is available for this question!
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2) What are the metal requirements to have creep resistance property?
a. Low melting point
b. High oxidation resistance
c. Both a. and b.
d. None of the above
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Answer
Explanation
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ANSWER: High oxidation resistance
Explanation:
No explanation is available for this question!
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3) Which of the following statements is/are false?
1. Ball indenter in Rockwell hardness test is made of diamond
2. Brale indenter in Rockwell hardness test is made of diamond
3. Micro hardness test is used to measure hardness of thin brittle materials
a. Only 1
b. Only 2
c. Only 3
d. All the statements are false
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Answer
Explanation
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ANSWER: Only 1
Explanation:
No explanation is available for this question!
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4) Which among the following is a type of destructive test?
a. Magnetic particle test
b. Cupping test
c. Dye penetrant
d. All of the above
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Answer
Explanation
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ANSWER: Cupping test
Explanation:
No explanation is available for this question!
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5) Up to which point in the graph shown below, Hooke's Law is obeyed?
a. Up to point D
b. Up to point A
c. Up to point B
d. Up to point X
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Answer
Explanation
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ANSWER: Up to point A
Explanation:
No explanation is available for this question!
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6) At which point elastic limit is observed in stress strain curve shown below
a. Point B
b. Point D
c. Point A
d. None of the above
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Answer
Explanation
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ANSWER: Point B
Explanation:
No explanation is available for this question!
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7) What is meant by resilience in stress strain curve?
a. area in the plastic region
b. area in the elastic region
c. area in elastic and plastic region
d. none of the above
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Answer
Explanation
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ANSWER: area in the elastic region
Explanation:
No explanation is available for this question!
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8) What is the effect of temperature on stiffness of a metal?
a. Temperature has no effect on stiffness of a metal
b. As temperature increases stiffness of metal decreases
c. As temperature increases stiffness of metal increases
d. None of the above
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Answer
Explanation
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ANSWER: As temperature increases stiffness of metal decreases
Explanation:
No explanation is available for this question!
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9) What is meant by malleability?
a. Metals undergo plastic deformation under compressive stresses
b. Metals can be drawn into wires
c. Both a. and b.
d. None of the above
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Answer
Explanation
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ANSWER: Metals undergo plastic deformation under compressive stresses
Explanation:
No explanation is available for this question!
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10) What is meant by ductility?
a. Metals can be drawn into sheets
b. Metals undergo elastic deformation under tensile loads
c. Metals undergo plastic deformation under tensile loads
d. All of the above
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Answer
Explanation
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ANSWER: Metals undergo plastic deformation under tensile loads
Explanation:
No explanation is available for this question!
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