Engineering Materials(Engineering > Mechanical Engineering ) Questions and Answers

Question 1. Nodular iron has
  1.     High machinability
  2.     Low melting point
  3.     High tensile strength
  4.     All of the above
Explanation:-
Answer: Option D. ->  All of the above
Explanation :
Question 2. The metal suitable for bearings subjected to heavy loads, is
  1.     Silicon bronze
  2.     White metal
  3.     Monel metal
  4.     Phosphor bronze
Explanation:-
Answer: Option B. ->  White metal
Explanation :
Question 3. The presence of sulphur in pig iron makes
  1.     It easily machinable
  2.     It brittle
  3.     It hard
  4.     The casting unsound
Explanation:-
Answer: Option D. ->  The casting unsound
Explanation :
Question 4. Tungsten in high speed steel provides
  1.     Hot hardness
  2.     Toughness
  3.     Wear resistance
  4.     Sharp cutting edge
Explanation:-
Answer: Option A. ->  Hot hardness
Explanation :
Question 5. Brass is an alloy of
  1.     Copper and zinc
  2.     Copper and tin
  3.     Copper, tin and zinc
  4.     None of these
Explanation:-
Answer: Option A. ->  Copper and zinc
Explanation :
Question 6. The property of a material due to which it breaks with little permanent distortion, is called
  1.     Brittleness
  2.     Ductility
  3.     Malleability
  4.     Plasticity
Explanation:-
Answer: Option A. ->  Brittleness
Explanation :
Question 7. Nickel when added to copper improves
  1.     Machinability
  2.     Hardness
  3.     Hardness and strength
  4.     Strength and ductility
Explanation:-
Answer: Option B. ->  Hardness
Explanation :
Question 8. The hardness is the property of a material due to which it
  1.     Can be drawn into wires
  2.     Breaks with little permanent distortion
  3.     Can cut another metal
  4.     Can be rolled or hammered into thin sheets
Explanation:-
Answer: Option C. ->  Can cut another metal
Explanation :
Question 9. When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.
  1.     Equal to
  2.     Less than
  3.     More than
  4.     None of these
Explanation:-
Answer: Option B. ->  Less than
Explanation :
Question 10. Induction hardening is the process of
  1.     Hardening surface of work-piece to obtain hard and wear resistant surface
  2.     Heating and cooling rapidly
  3.     Increasing hardness throughout
  4.     Inducing hardness by continuous process
Explanation:-
Answer: Option A. ->  Hardening surface of work-piece to obtain hard and wear resistant surface
Explanation :
© Lakshya_Education.com, All Right Reserved.
Contact Us services