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MCQs

Total Questions : 5013 | Page 497 of 502 pages
Question 4961. Coarse grained steels have____________________?
  1.    Low toughness
  2.    No tendency to distort
  3.    High density
  4.    Very high toughness
 Discuss Question
Answer: Option B. -> No tendency to distort
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4962. Speed of a submarine in deep sea & that of an aeroplane is measured by a/an___________________?
  1.    Pitot tube
  2.    Hot wire anemometer
  3.    Rotameter
  4.    Stroboscope
 Discuss Question
Answer: Option A. -> Pitot tube
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4963. Identify the correct statement with reference to the extractive metallurgy of aluminium ?
  1.    The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3
  2.    Approximately 80% of the aluminium deposited on the cathode comes from cryolite
  3.    Sodium is deposited along with aluminium, but is immediately vaporised
  4.    Anode effect sets in when the cryolite concentration goes below 40%.
 Discuss Question
Answer: Option A. -> The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4964. The main charge in blast furnace is usually___________________?
  1.    Iron ore & coke
  2.    Iron ore, coke & air
  3.    Limestone, coke & iron ore
  4.    Limestone, sand & iron ore
 Discuss Question
Answer: Option C. -> Limestone, coke & iron ore
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4965. Maximum change in the hardness of martensite occurs in the carbon content range of _____________ percent in steel?
  1.    0.01 to 0.10
  2.    0.2 to 0.4
  3.    0.5 to 0.7
  4.    0.8 to 1.0
 Discuss Question
Answer: Option B. -> 0.2 to 0.4
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4966. In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of_________________?
  1.    Stainless steel
  2.    Mild steel
  3.    High speed steel
  4.    High carbon steel
 Discuss Question
Answer: Option C. -> High speed steel
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4967. Calorific value of ____________________ are almost same?
  1.    Lignite & anthracite coal
  2.    Lignite & coal gas
  3.    Petrol & diesel
  4.    Coal gas & natural gas
 Discuss Question
Answer: Option C. -> Petrol & diesel
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4968. The atmospheric temperature during melting of ice/snow (in the atmosphere)_________________?
  1.    Decreases
  2.    Increases
  3.    Remain same
  4.    May increase or decrease; depends on the altitude where snow melts
 Discuss Question
Answer: Option A. -> Decreases
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4969. _______________ is not a case hardening process ?
  1.    Carburising
  2.    Nitriding
  3.    Cyaniding
  4.    Annealing
 Discuss Question
Answer: Option A. -> Carburising
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4970. Silicon percentage in acid resistant cast iron is about ___________________?
  1.    4
  2.    8
  3.    14
  4.    20
 Discuss Question
Answer: Option A. -> 4
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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