1) Which among the following is a paramagnetic material?
a. Iron
b. Cobalt
c. Nickel
d. Aluminum
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Answer
Explanation
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ANSWER: Aluminum
Explanation:
No explanation is available for this question!
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2) Which type of materials exhibit magnetism only in presence of an electric field?
a. Diamagnetic materials
b. Paramagnetic materials
c. Ferromagnetic materials
d. None of the above
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Answer
Explanation
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ANSWER: Paramagnetic materials
Explanation:
No explanation is available for this question!
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3) When magnetic field is removed, which type of materials maintain magnetic properties?
a. Ferromagnetic materials
b. Diamagnetic materials
c. Paramagnetic materials
d. All of the above
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Answer
Explanation
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ANSWER: Ferromagnetic materials
Explanation:
No explanation is available for this question!
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4) The materials are continuously magnetized throughout the operation in
a. DC applications
b. AC applications
c. Both a. and b.
d. None of the above
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Answer
Explanation
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ANSWER: AC applications
Explanation:
No explanation is available for this question!
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5) Which type of materials are used as bridges between human tissues and metals?
a. Polymeric biomaterials
b. Ceramic biomaterials
c. Metallic biomaterials
d. All of these
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Answer
Explanation
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ANSWER: Metallic biomaterials
Explanation:
No explanation is available for this question!
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6) Which of the following statements is/are false?
a. Temperature lower than 157 oC is cryogenic temperature
b. Impact test measures notch toughness
c. Nickel base steels are used for low temperature applications
d. All the above statements are false
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Answer
Explanation
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ANSWER: Temperature lower than 157 oC is cryogenic temperature
Explanation:
No explanation is available for this question!
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7) Biosensors are used in
a. medical field
b. agricultural field
c. pollution monitoring
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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8) What is meant by Nil Ductility Transition Temperature (NDT)?
a. Metal gets transformed from brittle to ductile phase
b. Metal gets transformed from ductile to brittle phase
c. Metal gets transformed from malleable to ductile phase
d. Metal gets transformed from elastic to ductile phase
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Answer
Explanation
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ANSWER: Metal gets transformed from ductile to brittle phase
Explanation:
No explanation is available for this question!
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9) What is the effect of high temperatures on material properties?
a. loss of cohesive strength
b. increase in stiffness
c. increase in hardness
d. All of the above
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Answer
Explanation
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ANSWER: loss of cohesive strength
Explanation:
No explanation is available for this question!
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10) What causes transformation of deformed martensite into austenite phase?
a. Heating
b. Cooling
c. both a. and b.
d. all of the above
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Answer
Explanation
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ANSWER: Heating
Explanation:
No explanation is available for this question!
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