Lakshya Education MCQs

Question: Steel contains
Options:
A. 80% or more iron
B. 50% or more iron
C. Alloying elements like chromium, tungsten nickel and copper
D. Elements like phosphorus, sulphur and silicon in varying quantities
Answer: Option B
Explanation :

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More Questions on This Topic :

Question 1. The portion of the blast furnace below its widest cross-section is called
  1.     Hearth
  2.     Stack
  3.     Bosh
  4.     Throat
Answer: Option C
Explanation :
Question 2. Blast furnace is used to produce
  1.     Pig iron
  2.     Cast iron
  3.     Wrought iron
  4.     Steel
Answer: Option A
Explanation :
Question 3. Connecting rod is usually made of
  1.     Aluminium
  2.     Low carbon steel
  3.     Medium carbon steel
  4.     High carbon steel
Answer: Option C
Explanation :
Question 4. An eutectoid steel consists of
  1.     Wholly pearlite
  2.     Wholly austenite
  3.     Pearlite and ferrite
  4.     Pearlite and cementite
Answer: Option A
Explanation :
Question 5. A small percentage of boron is added to steel in order to
  1.     Increase hardenability
  2.     Reduce machinability
  3.     Increase wear resistance
  4.     Increase endurance strength
Answer: Option A
Explanation :
Question 6. Steel contains
  1.     80% or more iron
  2.     50% or more iron
  3.     Alloying elements like chromium, tungsten nickel and copper
  4.     Elements like phosphorus, sulphur and silicon in varying quantities
Answer: Option B
Explanation :

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