Machine Design Approach MCQ

Test your knowledge with important Machine Design Approach MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more Machine Design Approach MCQs on Bissoy. Bissoy App

• At higher temperature, if higher frequency of stress cycle is applied on the material, fracture will be ___________ and at lower frequency of stress, the fracture will be ___________
  ক

  intergranular, intergranular

  খ

  transgranular, transgranuler

  গ

  intergranular, transgranular

  ঘ

  transgranuler, intergranular
• The fatigue strength of the material ___________ as the grain decreases.
  ক

  increases

  খ

  decreases

  গ

  remains the same

  ঘ

  no relation
• At any given temperature, the creep will __________ with increasing mean stress.
  ক

  decrease

  খ

  increase

  গ

  remain the same

  ঘ

  no relation
• The fatigue strength of the metal ____________ with increasing temperature.
  ক

  increases

  খ

  decrease

  গ

  remains the same

  ঘ

  no relation
• As the temperature decreases, there is a sudden change in the fatigue limit of the material, similar to what has been observed in the ductile to brittle transition.
  ক

  True

  খ

  False
• The fretting is the process of ____________
  ক

  corrosion due to water

  খ

  relative motion between 2 metal causing the corrosion

  গ

  corrosion due to air

  ঘ

  fatigue due to excessive stress
• The stainless steel components are coated with _________ to control the fatigue corrosion.
  ক

  copper

  খ

  zinc

  গ

  aluminum

  ঘ

  gold
• The number of pits generated on the surface of the material under fatigue corrosion are ________ than the number of pits on the surface of the same sample when it is tested only under corrosion environment.
  ক

  more

  খ

  less

  গ

  equal

  ঘ

  no pattern
• Is it possible that the material which shows the fatigue limit in normal environment does not show any endurance limit in a corrosive environment.
  ক

  True

  খ

  False
• Which one of the following is only present in the corrosion fatigue?
  ক

  Crack on surface

  খ

  Pits on surface

  গ

  Striation marks

  ঘ

  Benchmarks
• The corrosion fatigue is defined as the _________
  ক

  chemical attack

  খ

  stress

  গ

  cycle stress

  ঘ

  chemical attack and cycle stress
• The fatigue strength of the metal strain aging due to interstitial atoms is shown by which of the following curve?
  ক

  A

  খ

  B

  গ

  C

  ঘ

  D
• The fatigue strength of the pure metal is shown by which of the following curve?
  ক

  A

  খ

  B

  গ

  C

  ঘ

  D
• The ratio of fatigue strength of the material in the transverse direction to longitudinal direction (of their extrusion) will be highest in ___________
  ক

  induction furnace melted sample

  খ

  arc melting furnace melted sample

  গ

  vacuum melting sample

  ঘ

  cupola furnace meted sample
• Which of the following structure has the best fatigue property?
  ক

  Pearlite

  খ

  Martensite

  গ

  Tempered martensite

  ঘ

  Bainite
• What is the relationship between the grain size and the fatigue strength for low stacking fault energy material?
  ক

  Fatigue strength is directly proportional to grain size

  খ

  Fatigue strength is inversely proportional to grain size

  গ

  Fatigue strength is directly proportional to the square of grain size

  ঘ

  Fatigue strength is inversely proportional to the square root of grain size
• The effect of grain size on the fatigue strength is predominant in material with high stacking fault energy while the effect of grain size is negligible in low stacking fault energy material.
  ক

  True

  খ

  False
• The material with higher stacking fault energy has higher fatigue strength whereas the material with lower stacking fault will have a lower fatigue limit.
  ক

  True

  খ

  False