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Test: Design For Static And Dynamic Load Level - 1 - Mechanical Engineering MCQ


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10 Questions MCQ Test Design of Machine Elements - Test: Design For Static And Dynamic Load Level - 1

Test: Design For Static And Dynamic Load Level - 1 for Mechanical Engineering 2025 is part of Design of Machine Elements preparation. The Test: Design For Static And Dynamic Load Level - 1 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Design For Static And Dynamic Load Level - 1 MCQs are made for Mechanical Engineering 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Design For Static And Dynamic Load Level - 1 below.
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Test: Design For Static And Dynamic Load Level - 1 - Question 1

Which strength of the material is to be considered for design of a ductile component under cyclic load?

Detailed Solution for Test: Design For Static And Dynamic Load Level - 1 - Question 1
Endurance strength is to be considered for design of a component under cyclic load. The fatigue or endurance limit of a material is defined as the maximum amplitude of completely reversed stress that the standard specimen can sustain for an unlimited number of cycles without fatigue failure.

Test: Design For Static And Dynamic Load Level - 1 - Question 2

The relationship between notch sensitivity factor (q), theoretical stress concentration factor

(kt) and fatigue (or) form stress concentration (kf) is given

Detailed Solution for Test: Design For Static And Dynamic Load Level - 1 - Question 2

Note:

Actual stress concentration factor

Theoretical stress concentration factor

Test: Design For Static And Dynamic Load Level - 1 - Question 3

Endurance limit is determined by a test, applying

Test: Design For Static And Dynamic Load Level - 1 - Question 4

In a semi-infinite flat plate shown in the figure, the theoretical stress concentration factor kt for an elliptical hole of major axis 2a and minor axis 2b is given by

Detailed Solution for Test: Design For Static And Dynamic Load Level - 1 - Question 4

To find the theoretical stress concentration factor (kt) for an elliptical hole in a semi-infinite flat plate, use the following formula:

kt = 1 + 2(a / b)

Where:

  • a is the semi-major axis of the ellipse (half of the major axis, 2a).
  • b is the semi-minor axis of the ellipse (half of the minor axis, 2b).

This formula calculates the stress concentration factor, which shows how much stress is concentrated around the hole due to its elliptical shape. The value of kt increases as the ratio of the major axis (a) to the minor axis (b) increases. Larger values of a relative to b result in higher stress concentration.

Test: Design For Static And Dynamic Load Level - 1 - Question 5

Fatigue of a component is due to

Detailed Solution for Test: Design For Static And Dynamic Load Level - 1 - Question 5
Fatigue of a component is due to cyclic load. Fatigue occurs when a material is subjected to repeated loading and unloading.

Test: Design For Static And Dynamic Load Level - 1 - Question 6

Endurance limit of a component

Test: Design For Static And Dynamic Load Level - 1 - Question 7

Number of cycles of repetitions for low cycle fatigue in steel is

Test: Design For Static And Dynamic Load Level - 1 - Question 8

To design a component of ductile material under variable loading, stress concentration factor is applied to

Test: Design For Static And Dynamic Load Level - 1 - Question 9

The maximum value of stress concentration factor in an infinite plate with a circular hole under uniaxial tension is

Detailed Solution for Test: Design For Static And Dynamic Load Level - 1 - Question 9

For circular, a = b

Test: Design For Static And Dynamic Load Level - 1 - Question 10

Which of the following is not the correct procedure to increase the fatigue limit

Detailed Solution for Test: Design For Static And Dynamic Load Level - 1 - Question 10
Fatigue limit of material can be increased by
  • By applying residual compressive stress (under stress)

  • By surface finishing

  • By shot peening

  • Cold working

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