Machine Design MCQs with answers Page - 4

Here, you will find a collection of MCQ questions on Machine Design. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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A

Admin • 828.03K Points
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Q. Fibrous fracture occurs in

  • (A) ductile material
  • (B) brittle material
  • (C) elastic material
  • (D) hard material

A

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Q. For applications involving high stresses in one direction only the following type of thread would be best suited

  • (A) ISO metric thread
  • (B) acme thread
  • (C) square thread
  • (D) buttress thread

A

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Q. For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately

  • (A) 0.4 times
  • (B) 0.6 times
  • (C) 0.7 times
  • (D) 0.8 times

A

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Q. For steel, the ultimate strength in shear as compared to ultimate strength in tension is

  • (A) same
  • (B) 43862
  • (C) 43891
  • (D) 43892

A

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Q. For tight leakage joints, following type of thread is best suited

  • (A) metric
  • (B) buttress
  • (C) square
  • (D) NPT (national pipe threads)

A

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Q. Form coefficient of spring is

  • (A) ratio of coil diameter to wire diameter
  • (B) load required to produce unit deflection
  • (C) its capability of storing energy
  • (D) concerned With strength of wire of spring

A

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Q. Gear box is used

  • (A) to produce torque
  • (B) for speed reduction
  • (C) to obtain variable speeds
  • (D) to increase efficiency of system

A

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Q. I.S. specifies following total number of grades of tolerances

  • (A) 18
  • (B) 16
  • (C) 20
  • (D) 22

A

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Q. If a load W is applied instantaneously on a bar; then the stress induced in bar will

  • (A) be independent of ratio of mass of load W to mass of bar (y)
  • (B) increase with increase in y
  • (C) decrease with decrease in y
  • (D) depend on other considerations

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Q. If a material fails below its yield point, failure would be due to

  • (A) straining
  • (B) fatigue
  • (C) creep
  • (D) sudden loading

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