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MCQs

Total Questions : 110 | Page 1 of 11 pages
Question 1. Copper can be reduced from acidic copper sulphate solution by
  1.    Silver
  2.    Iron
  3.    Carbon
  4.    Lead
 Discuss Question
Answer: Option B. -> Iron


-NA-


Question 2. During the solidification of a pure metal, it was found that dendrites are formed. Assuming that the
liquid-solid interface is at the melting temperature, the temperature from the interface into the
liquid
  1.    Decreases
  2.    Increases
  3.    Remains constant
  4.    Increases and then decreases
 Discuss Question
Answer: Option A. -> Decreases


-NA-


Question 3. Which one is NOT an agglomeration process?
  1.    Nodulizing
  2.    Briquetting
  3.    Roasting
  4.    Pelletizing
 Discuss Question
Answer: Option C. -> Roasting


-NA-


Question 4. During LD blow in steelmaking the impurity that gets removed first is
  1.    Carbon
  2.    Phosphorous
  3.    Manganese
  4.    Silicon
 Discuss Question
Answer: Option D. -> Silicon


-NA-


Question 5. A peak in the X-ray diffraction pattern is observed at 2θ = 78o, corresponding to {311} planes of an
fcc metal, when the incident beam has a wavelength of 0.154 nm. The lattice parameter of the
metal is approximately
  1.    0.6 nm
  2.    0.4 nm
  3.    0.3 nm
  4.    0.2 nm
 Discuss Question
Answer: Option B. -> 0.4 nm


-NA-


Question 6. Match the phenomena listed in Group I with the possible mechanisms in Group IIGroup I                                Group IIP. Fatigue                        1. Grain boundary slidingQ. Creep                          2. Slip band extrusion and intrusionR. Strain hardening        3. Cottrell atmosphereS. Yield point phenomenon  4. Dislocation interaction
  1.    P-2, Q-3, R-4, S-1
  2.    P-2, Q-4, R-3, S-1
  3.    P-2, Q-1, R-4, S-3
  4.    P-1, Q-2, R-4, S-3
 Discuss Question
Answer: Option C. -> P-2, Q-1, R-4, S-3


-NA-


Question 7. Match the defects listed in Group I with the processes listed in Group IIGroup I                      Group IIP. Cold shut             1. RollingQ. Earing                  2. ForgingR. Alligatoring         3. Deep drawingS. Shrinkage porosity  4. Fusion welding
  1.    P-2, Q-4, R-1, S-4
  2.    P-2, Q-4, R-3, S-1
  3.    P-2, Q-3, R-1, S-4
  4.    P-4, Q-1, R-2, S-3
 Discuss Question
Answer: Option C. -> P-2, Q-3, R-1, S-4


-NA-


Question 8. Determine the correctness or otherwise of the following Assertion (a) and Reason (r). AssertionDuring rolling, front tension and (or) back tension are (is) employed to decrease rolling
load. 
Reason : Roll pressure decreases due to lowering of flow stress as a result of front tension/back
tension.
  1.    a
  2.    a
  3.    a
  4.    a
 Discuss Question
Answer: Option C. -> a


-NA-


Question 9. Fracture stress for a brittle material having a crack length of 1 μm is 200 MPa. Fracture stress for
the same material having a crack length of 4 μm is
  1.    200 MPa
  2.    150 MPa
  3.    100 MPa
  4.    50 MPa
 Discuss Question
Answer: Option C. -> 100 MPa


-NA-


Question 10. Degree and order of the differential equation d2y/dx2 + 3 dy/dx - 6y = 0, respectively, are
  1.    1 and 2
  2.    2 and 1
  3.    1 and 1
  4.    2 and 2
 Discuss Question
Answer: Option A. -> 1 and 2


-NA-


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