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MCQs

Total Questions : 1977 | Page 192 of 198 pages
Question 1911. Which of the following is not an alloy of copper and tin?
  1.    Gun metal
  2.    Admiralty gun metal
  3.    Bell metal
  4.    Monel metal
 Discuss Question
Answer: Option D. -> Monel metal
Question 1912. The impure iron (pig iron) that is tapped out from blast furnace contains about __________ percent carbon.
  1.    4
  2.    0.2
  3.    8
  4.    2
 Discuss Question
Answer: Option A. -> 4
Question 1913. Cast iron detachable joint is used in __________ pipes.
  1.    Reinforced cement concrete
  2.    Cast iron
  3.    Asbestos cement
  4.    Steel
 Discuss Question
Answer: Option D. -> Steel
Question 1914. Containers made of high silicon cast iron (14% Si) are not suitable for the storage of
  1.    Hydrochloric acid (concentrated)
  2.    Benzoic & boric acids
  3.    Acetic acid
  4.    Phosphoric acid (95%) & sulphuric acid (95%)
 Discuss Question
Answer: Option A. -> Hydrochloric acid (concentrated)
Question 1915. Hardening of steel is not possible unless it is heated __________ critical point.
  1.    Between the first & second
  2.    Between the second & third
  3.    Above the highest
  4.    Above the lowest
 Discuss Question
Answer: Option D. -> Above the lowest
Question 1916. Brass container is suitable for storing
  1.    Aqueous ammonia
  2.    Phosphoric acid (95%)
  3.    Beer
  4.    H₂SO₄(95%)
 Discuss Question
Answer: Option C. -> Beer
Question 1917. __________ is added in low carbon steel to raise its yield point.
  1.    Sulphur
  2.    Manganese
  3.    Silicon
  4.    Phosphorous
 Discuss Question
Answer: Option B. -> Manganese
Question 1918. Mild steel is a/an __________ steel.
  1.    High carbon
  2.    High alloy
  3.    Low carbon
  4.    Medium carbon
 Discuss Question
Answer: Option C. -> Low carbon
Question 1919. Addition of __________ to the steel helps in increasing the residual magnetism in steel used for making magnets.
  1.    Chromium
  2.    Cobalt
  3.    Tungsten
  4.    Nickel
 Discuss Question
Answer: Option B. -> Cobalt
Question 1920. Telfon (PTFE) is corroded by
  1.    None of these
  2.    Sulphuric acid
  3.    Hydrochloric acid (95%)
  4.    Hydrochloric acid (10%)
 Discuss Question
Answer: Option A. -> None of these

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