1) Which among the following is a paramagnetic material?
a. Iron
b. Cobalt
c. Nickel
d. Aluminum
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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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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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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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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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6) Which of the following statements is/are true for cold working process?
1. Cold working process does not provide good surface finish
2. Cold working process produces internal stress in a metal
3. Fatigue strength of metals can be improved
4. Cold working process cannot take place below recrystallization temperature
a. statement 1 and statement 2
b. statement 2 and statement 3
c. statement 3 and statement 4
d. all the above statements are true
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7) Why are internal stresses not produced in hot working process?
a. Micro structures undergo distortion
b. Hot working process do not undergo recrystallization
c. Hot working process undergo recrystallization
d. None of the above
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Answer
Explanation
Related Ques
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ANSWER: Hot working process undergo recrystallization
Explanation:
No explanation is available for this question!
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8) What is meant by Frenkel defect?
a. defect in which interstitial position is occupied by missing atoms
b. defect in which positive and negative ions are missing
c. defect in which interstitial position is occupied by extra atom in the crystal without disorganizing the parent atom
d. none of the above
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Answer
Explanation
Related Ques
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ANSWER: defect in which interstitial position is occupied by missing atoms
Explanation:
No explanation is available for this question!
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9) Which among the following is known as Schmid's factor?
a. (cos2 α) x (cos2 β)
b. (cos α) x (sin β)
c. (sin α) x (sin β)
d. (cos α) x (cos β)
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10) When are the slip lines observed?
a. after plastic deformation
b. before plastic deformation
c. after mechanical working
d. after annealing
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11) Which type of composite materials the sandwich panels are?
a. Structural
b. Fiber reinforced
c. Particle reinforced
d. None of the above
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12) Which of the following statements is true?
a. Ceramic materials have low melting point
b. Porcelain is used as insulating material in spark plugs
c. Graphite is viscoelastic in nature
d. Compacting iron oxide powder ceramic tools are prepared
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Answer
Explanation
Related Ques
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ANSWER: Porcelain is used as insulating material in spark plugs
Explanation:
No explanation is available for this question!
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13) Which among the following rubbers are used for automobile tyres?
a. Only Polyurethane rubbers
b. Only Butadiene rubbers
c. Both Polyurethane and Butadiene are used
d. None of these
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14) What is the byproduct formed by the condensation of methyl alcohol and acetic acid to form ester?
a. water
b. hydrogen
c. oxygen
d. none of the above
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15) Which materials can be used to manufacture elastomers?
a. Limestone
b. Petroleum
c. Alcohol
d. All of the above
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16) 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
Related Ques
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ANSWER: As temperature increases stiffness of metal decreases
Explanation:
No explanation is available for this question!
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17) 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
Related Ques
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ANSWER: Metals undergo plastic deformation under compressive stresses
Explanation:
No explanation is available for this question!
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18) 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
Related Ques
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ANSWER: Metals undergo plastic deformation under tensile loads
Explanation:
No explanation is available for this question!
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19) Which of the following statements is/are true?
a. In tensile specimens necking is observed in brittle fractures
b. Cup and cone formation characterizes ductile fractures
c. Stress in brittle fractures increases during cracking
d. All the above
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Answer
Explanation
Related Ques
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ANSWER: Cup and cone formation characterizes ductile fractures
Explanation:
No explanation is available for this question!
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20) Erichsen cupping test is known as
a. creep test
b. torsion test
c. fatigue test
d. formability test
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21) During radiography test, which region absorbs less radiation and transmits more?
a. Low and high density regions absorb and transmit same amount of radiation
b. High density region
c. Low density region
d. None of the above
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22) Which test is used to determine dimensions of any object?
a. Ultrasonic test
b. Torsion test
c. Eddy current test
d. All of these tests can be used to determine dimensions of any object
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23) Eddy current test is used to detect
a. cracks
b. hardness
c. conductivity
d. All of the above
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24) In which type of test the capillary action principle is used?
a. Probe test
b. Bend liquid test
c. Dye penetrant test
d. None of the above
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25) Which test can be performed without skilled labour?
a. Dye penetrant testing
b. Visual testing
c. Ultrasonic testing
d. Magnetic particle test
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