Lakshya Education MCQs

Question: Foundry crucible is made of
Options:
A. Mild steel
B. German silver
C. Lead
D. Graphite
Answer: Option D
Explanation :

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More Questions on This Topic :

Question 1. Which is the false statement about wrought iron? it has
  1.     High resistance to rusting and corrosion
  2.     High ductility
  3.     Ability of hold protective coating
  4.     Uniform strength in all directions
Answer: Option D
Explanation :
Question 2. Which is the false statement about wrought iron? it has
  1.     High resistance to rusting and corrosion
  2.     High ductility
  3.     Ability of hold protective coating
  4.     Uniform strength in all directions
Answer: Option D
Explanation :
Question 3. Chilled cast iron has
  1.     No graphite
  2.     A very high percentage of graphite
  3.     A low percentage of graphite
  4.     Graphite as its basic constituent of composition
Answer: Option A
Explanation :
Question 4. Perminvar alloy having constant permeability is an alloy of
  1.     Nickel, copper and iron
  2.     Nickel, copper and zinc
  3.     Copper, nickel and antimony
  4.     Iron, zinc and bismuth
Answer: Option A
Explanation :
Question 5. Gun metal contains
  1.     70% copper and 30% zinc
  2.     90% copper and 10% tin
  3.     85 - 92% copper and rest tin with little lead and nickel
  4.     70 - 78% copper and rest tin
Answer: Option C
Explanation :
Question 6. Dye penetrant method is generally used to locate
  1.     Core defects
  2.     Surface defects
  3.     Superficial defects
  4.     Temporary defects
Answer: Option B
Explanation :

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