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MCQs

Total Questions : 5013 | Page 11 of 502 pages
Question 101. Ceramic tips for the cutting tool are prepared from __________ powder.
  1.    Carbon
  2.    Silicon carbide
  3.    Aluminium oxide
  4.    Tungsten
 Discuss Question
Answer: Option C. -> Aluminium oxide
Question 102. Ceramic tips for the cutting tool are prepared from __________ powder.
  1.    Carbon
  2.    Silicon carbide
  3.    Aluminium oxide
  4.    Tungsten
 Discuss Question
Answer: Option C. -> Aluminium oxide
Question 103. Even minute presence of impurities in copper impairs its electrical conductivity seriously. Electrolytic refinning of blister copper is resorted to, when
  1.    Cheap electricity is available
  2.    The precious metal content of copper is high
  3.    There is a demand for ultrapure (99.99%) electrolytic copper
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 104. The most suitable material for a sewer for carrying storm water is
  1.    Asbestos cement
  2.    Cast iron
  3.    Mild steel
  4.    Cement concrete
 Discuss Question
Answer: Option D. -> Cement concrete
Question 105. If Reynolds number is greater than 1, then the
  1.    Viscous force is larger than the inertia force
  2.    Inertia force is larger than the viscous force
  3.    Inertia force is larger than the surface tension force
  4.    Inertia force is larger than the gravitational force
 Discuss Question
Answer: Option B. -> Inertia force is larger than the viscous force
Question 106. Property responsible for the talcum powder to cling to the skin is the
  1.    Capillary action
  2.    Adhesion
  3.    Cohesion
  4.    Surface tension
 Discuss Question
Answer: Option B. -> Adhesion
Question 107. Increasing the temperature of a material makes it
  1.    Harder
  2.    Softer
  3.    Tougher
  4.    Stronger
 Discuss Question
Answer: Option B. -> Softer
Question 108. Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)
  1.    1/k
  2.    k
  3.    k²
  4.    1/k²
 Discuss Question
Answer: Option B. -> k
Question 109. Which of the following alloying elements is present in maximum percentage in high speed steel.
  1.    Molybdenum
  2.    Chromium
  3.    Tungsten
  4.    Vanadium
 Discuss Question
Answer: Option A. -> Molybdenum
Question 110. Value of a material is usually considered as a relationship between
  1.    Cost and profit
  2.    Utility and appearance
  3.    Utility and cost
  4.    Reliability and utility
 Discuss Question
Answer: Option C. -> Utility and cost

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