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MCQs

Total Questions : 1977 | Page 21 of 198 pages
Question 201. Which of the following comprises of hydrocarbons?
  1.    Mica flakes
  2.    Glass
  3.    Rubber
  4.    None of these
 Discuss Question
Answer: Option C. -> Rubber
Question 202. Specify the material of construction suitable for handling concentrated HNO₃ at 100°C.
  1.    High silicon iron, Kel-F and teflon
  2.    Tin and wood
  3.    Silicone rubber
  4.    Stainless steel
 Discuss Question
Answer: Option A. -> High silicon iron, Kel-F and teflon
Question 203. Which of the following is not an alloy of copper?
  1.    Muntz metal
  2.    Admirability gun metal
  3.    German silver
  4.    Pewter metal
 Discuss Question
Answer: Option D. -> Pewter metal
Question 204. Softness of silver can be converted into hardness by alloying it with small quantity of
  1.    Copper & nickel
  2.    Zinc
  3.    Aluminium
  4.    Tin
 Discuss Question
Answer: Option A. -> Copper & nickel
Question 205. Tempering of steel is done to make it
  1.    Brittle
  2.    Hard
  3.    Rollable
  4.    Soft
 Discuss Question
Answer: Option D. -> Soft
Question 206. Galvanising (i.e., zinc coating) of steel sheets is done to
  1.    Prevent its rusting by contact with corrosive atmosphere
  2.    Protect the base metal by cathodic protection
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A & B
Question 207. Nickel is a constituent of
  1.    Bronze
  2.    Solder
  3.    Duralumin
  4.    Monel metal
 Discuss Question
Answer: Option D. -> Monel metal
Question 208. Which of the following heat treatment processes is used for softening the hardened material?
  1.    Normalising
  2.    Tempering
  3.    Annealing
  4.    None of these
 Discuss Question
Answer: Option B. -> Tempering
Question 209. Stainless steel is not corroded by
  1.    Hydrochloric acid (10%)
  2.    Nitric acid (10%)
  3.    Sulphuric acid (10%)
  4.    Saturated brine
 Discuss Question
Answer: Option B. -> Nitric acid (10%)
Question 210. Which of the following stainless steels is non-magnetic?
  1.    Ferritic
  2.    Martensitic
  3.    Austenitic
  4.    None of these
 Discuss Question
Answer: Option C. -> Austenitic

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