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MCQs

Total Questions : 5013 | Page 64 of 502 pages
Question 631. Which of the following metals reacts violently with water ?
  1.    Mercury
  2.    Sodium
  3.    Calcium
  4.    Magnesium
 Discuss Question
Answer: Option B. -> Sodium
Question 632. The process of removal of scale formed during hot rolling of steel is termed as
  1.    Descaling
  2.    Shot blasting
  3.    Pickling
  4.    Skimming
 Discuss Question
Answer: Option C. -> Pickling
Question 633. During sensible heating of humid air
  1.    Relative humidity increases
  2.    Dew point remains constant
  3.    Dry bulb & wet bulb temperature increases
  4.    Both 'b' & 'c'
 Discuss Question
Answer: Option D. -> Both 'b' & 'c'
Question 634. Silicon crystal can be converted to p-type semi-conductor by doping with
  1.    Phosphorous
  2.    Nitrogen
  3.    Carbon
  4.    Boron
 Discuss Question
Answer: Option D. -> Boron
Question 635. At the point of boundary layer separation in fluid flow, the
  1.    Shear stress is maximum
  2.    Velocity gradient is flat
  3.    Density variation is maximum
  4.    Shear stress is zero
 Discuss Question
Answer: Option A. -> Shear stress is maximum
Question 636. The most suitable material of construction for a sewer to carry sewage under high pressure is
  1.    Asbestos cement
  2.    Steel
  3.    Cement concrete
  4.    Stoneware
 Discuss Question
Answer: Option B. -> Steel
Question 637. Stretcher strains found in a low carbon sheet are associated with the
  1.    Texture
  2.    Dislocation density
  3.    Yield point phenomenon
  4.    Thickness of the sheet
 Discuss Question
Answer: Option C. -> Yield point phenomenon
Question 638. For hardening high alloy steel, it is to be heated slowly and uniformly to avoid
  1.    Local hardening
  2.    Scale formation
  3.    Segregation
  4.    Warpage
 Discuss Question
Answer: Option D. -> Warpage
Question 639. To improve the machinability of steel by its softening, it is subjected to
  1.    Cold working
  2.    Annealing
  3.    Shot blasting
  4.    Heating
 Discuss Question
Answer: Option C. -> Shot blasting
Question 640. A compact estimate about the amount of materials handling between various work stations is obtained from the
  1.    Gantt chart
  2.    Bin chart
  3.    String diagram
  4.    Travel chart
 Discuss Question
Answer: Option D. -> Travel chart

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