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MCQs

Total Questions : 1977 | Page 10 of 198 pages
Question 91. The hardest material just prior to diamond in Mhos scale is
  1.    Topax
  2.    Carborundum
  3.    Corrundum
  4.    Calcite
 Discuss Question
Answer: Option C. -> Corrundum
Question 92. Dip stick used for measuring the level of petro fuels (e.g. petrol, diesel, fuel oil etc.) in the storage tank is usually made of
  1.    Brass
  2.    Copper
  3.    High carbon steel
  4.    Aluminium
 Discuss Question
Answer: Option A. -> Brass
Question 93. The process of coating steel sheets by zinc to improve its corrosion resistance is called
  1.    Calorising
  2.    Galvanising
  3.    Zincification
  4.    Tempering
 Discuss Question
Answer: Option B. -> Galvanising
Question 94. The main constituent of carborundum is __________ carbide.
  1.    Calcium
  2.    Silicon
  3.    Boron
  4.    Aluminium
 Discuss Question
Answer: Option B. -> Silicon
Question 95. Cast iron vessels are not suitable for the storage of
  1.    Freon
  2.    H₂SO₄ (95%) at room temperature
  3.    H₂SO₄ (fuming)
  4.    Wet SO₂
 Discuss Question
Answer: Option D. -> Wet SO₂
Question 96. Wrought iron is having very high
  1.    Hardness
  2.    Strength
  3.    Corrosion resistance
  4.    Susceptibility to changes in its properties by heat treatment
 Discuss Question
Answer: Option C. -> Corrosion resistance
Question 97. Anodic material used for the cathodic protection of underground buried steel pipeline is
  1.    Nickel or copper
  2.    Zinc or magnesium
  3.    Bronze
  4.    Brass
 Discuss Question
Answer: Option B. -> Zinc or magnesium
Question 98. Presence of high phosphorous in cast iron increases its
  1.    Fluidity
  2.    Melting point
  3.    Shrinkage
  4.    Tensile strength
 Discuss Question
Answer: Option A. -> Fluidity
Question 99. For platinum thermocouples, lead wires are made of
  1.    Copper & copper-nickel alloys
  2.    Copper & iron
  3.    Iron & nickel
  4.    Tin & nickel
 Discuss Question
Answer: Option A. -> Copper & copper-nickel alloys
Question 100. Which of the following is not shipped in mild steel containers?
  1.    Acetone
  2.    Ammonia
  3.    Ethyl alcohol
  4.    Formic acid
 Discuss Question
Answer: Option D. -> Formic acid

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