Lakshya Education MCQs

Question: Constituents of stellite are
Options:
A.Zinc, copper and nickel
B.Cobalt, chromium and tungsten
C.Zinc, aluminium and nickel
D.Nickel, cobalt and vanadium
Answer: Option B

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More Questions on This Topic :

Question 1. Polythene (low or high density) containers are not corroded by
  1.    Sulphuric acid (10%) at room temperature
  2.    Nitric acid (95%) at room temperature
  3.    Sulphur trioxide at 60°C
  4.    Any of these
Answer: Option A
Question 2. An alloy of iron containing 4% carbon is called
  1.    High carbon steel
  2.    Wrought iron
  3.    Mild steel
  4.    None of these
Answer: Option D
Question 3. German silver used for decorative purposes contains maximum percentage of
  1.    Silver
  2.    Copper
  3.    Zinc
  4.    Nickel
Answer: Option B
Question 4. Constantan is an alloy of
  1.    Cu (55%) & Sn (45%)
  2.    Cu (55%) & Ni (45%)
  3.    Pt (95%) & Rh (10%)
  4.    Fe (80%) & Ni (20%)
Answer: Option B
Question 5. H₂SO₄ (< 50% concentration) is corrosive to
  1.    Aluminium, mild steel, stainless steel, concrete & tin
  2.    Copper, cast iron & high silicon iron (14% Si)
  3.    Rubber (butyl and hard), silicone rubber & teflon
  4.    Glass, graphite, porcelain & stoneware
Answer: Option A
Question 6. Cast iron compared to steel is better in
  1.    Ductility
  2.    Fluidity & castability
  3.    Strength
  4.    Malleability
Answer: Option B

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