Lakshya Education MCQs

Question: Alloying elements present in Hayness stel-lite, which has superior performance than high speed steel, are
Options:
A.Nickel, cobalt & chromium
B.Tungsten, chromium & cobalt
C.Manganese, chromium & cobalt
D.Tungsten, molybdenum & nickel
Answer: Option B

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Question 1. When the weight of a ball inside the ball mill is just balanced by the centrifugal force,
  1.    The ball abandons its circular path for a parabolic path
  2.    The ball abandans its parabolic path for a circular path
  3.    The ball continues to move on a circular path
  4.    The ball continues to move on a parabolic path
Answer: Option A
Question 2. Electrode potential is not concerned with the measurment of
  1.    PH value
  2.    Temperature
  3.    Viscosity
  4.    Density
Answer: Option B
Question 3. Which of the, following is not associated with the functioning of a petrol engine ?
  1.    Compression ignition system
  2.    Spark plug
  3.    Carburettor
  4.    Otto cycle
Answer: Option A
Question 4. Heating of an ore below its melting point in presence of excess of air is called
  1.    Calcination
  2.    Smelting
  3.    Roasting
  4.    Sublimation
Answer: Option C
Question 5. Which of the following is not found in iron-carbon equilibrium diagram?
  1.    Curie point
  2.    Peritectic point
  3.    Eutectic point
  4.    Eutectoid point
Answer: Option A
Question 6. Maxwell's thermodynamic relations applies to the
  1.    Chemical systems in equilibrium
  2.    Mechanical systems in equilibrium
  3.    Irreversible thermodynamic processes
  4.    Reversible thermodynamic processes
Answer: Option A

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