To predict failure in design components which failure criteria is not assumed, when mean stress and stress amplitude are nonzero? a. Goodman criterion b. Soderberg criteria c. Gerber criteria d. None of the above

To predict failure in design components which failure criteria is not assumed, when mean stress and stress

amplitude are nonzero?

a. Goodman criterion

b. Soderberg criteria

c. Gerber criteria

d. None of the above
by

1 Answer

Answer :

d. None of the above
by

Related questions

Line joining S yt (yield strength of the material) on mean stress axis and S e (endurance limit of the component) on stress amplitude axis is called as _____ a. Goodman line b. Soderberg line c. Gerber line d. None of the above

Description : Line joining S yt (yield strength of the material) on mean stress axis and S e (endurance limit of the component) on stress amplitude axis is called as _____ a. Goodman line b. Soderberg line c. Gerber line d. None of the above

Last Answer : b. Soderberg line

The test data for Notched specimen fall near the ________________ line. a) Soderberg line b) Goodman Line c) Gerber line d) Haig line

Description : The test data for Notched specimen fall near the ________________ line. a) Soderberg line b) Goodman Line c) Gerber line d) Haig line

Last Answer : b) Goodman Line

In the Haig-Soderberg diagram, the test data for ductile material falls near the ______________ a) Soderberg line b) Goodman Line c) Gerber line d) Haig line

Description : In the Haig-Soderberg diagram, the test data for ductile material falls near the ______________ a) Soderberg line b) Goodman Line c) Gerber line d) Haig line

Last Answer : c) Gerber line

A transmission shaft subjected to pure bending moment should be designed on the basis of (A) Maximum principal stress theory (B) Maximum shear stress theory (C) Distortion energy theory (D) Goodman or Soderberg diagrams

Description : A transmission shaft subjected to pure bending moment should be designed on the basis of (A) Maximum principal stress theory (B) Maximum shear stress theory (C) Distortion energy theory (D) Goodman or Soderberg diagrams

Last Answer : (A) Maximum principal stress theory

Which of the following equations is correct for Soderberg Criteria? a. (σ m / S ut ) + (σ a / S e ) = (1 / N f ) b. (σ m / S ut ) - (σ a / S e ) = (1 / N f ) c. (σ m / S yt ) + (σ a / S e ) = (1 / N f ) d. (σ m / S ut ) - (σ a / S e ) = (1 / N f )

Description : Which of the following equations is correct for Soderberg Criteria? a. (σ m / S ut ) + (σ a / S e ) = (1 / N f ) b. (σ m / S ut ) - (σ a / S e ) = (1 / N f ) c. (σ m / S yt ) + (σ a / S e ) = (1 / N f ) d. (σ m / S ut ) - (σ a / S e ) = (1 / N f )

Last Answer : c. (σ m / S yt ) + (σ a / S e ) = (1 / N f )

Theories of elastic failure while dealing with brittle materials consider the failure criterion as (a) Ultimate stress (b) Yield stress (c) Both ultimate and yield stress (d) None

Description : Theories of elastic failure while dealing with brittle materials consider the failure criterion as (a) Ultimate stress (b) Yield stress (c) Both ultimate and yield stress (d) None

Last Answer : (a) Ultimate stress

Theories of elastic failure while dealing with ductile materials consider the failure criterion as (a) Ultimate stress (b) Yield stress (c) Both ultimate and yield stress (d) None

Description : Theories of elastic failure while dealing with ductile materials consider the failure criterion as (a) Ultimate stress (b) Yield stress (c) Both ultimate and yield stress (d) None

Last Answer : (b) Yield stress

The relationship between the alternating stress and mean stress is given by the following equation: σ a =σ e [1-(σ m /σ u )x], where σ e is the fatigue limit for completely reversed loading. The value of x for Gerber line is equal to _________ a) 1 b) 2 c) 0.5 d) -1

Description : The relationship between the alternating stress and mean stress is given by the following equation: σ a =σ e [1-(σ m /σ u )x], where σ e is the fatigue limit for completely reversed loading. The value of x for Gerber line is equal to _________ a) 1 b) 2 c) 0.5 d) -1

Last Answer : b) 2

The relationship between the alternating stress and mean stress is given by the following equation: σ a = σ e [1-(σ m /σ u ) x ]. The value of x for Goodman line is equal to _________ a) 1 b) 2 c) 0.5 d) -1

Description : The relationship between the alternating stress and mean stress is given by the following equation: σ a = σ e [1-(σ m /σ u ) x ]. The value of x for Goodman line is equal to _________ a) 1 b) 2 c) 0.5 d) -1

Last Answer : a) 1

What Is The Use Of Goodman & Soderberg Diagrams?

Description : What Is The Use Of Goodman & Soderberg Diagrams?

Last Answer : They are used to solve the problems of variable stresses.

Finding allowable stress after the application of theories of failure ensures (a) Soundness of design (b) Lapses in design (c) Both (a) & (b) (d) None

Description : Finding allowable stress after the application of theories of failure ensures (a) Soundness of design (b) Lapses in design (c) Both (a) & (b) (d) None

Last Answer : (a) Soundness of design

In general in the design of a section by limit method, it is assumed that [ A ] the stress in steel to reach its yield limit before concrete failure [ B ] the stress in concrete to reach its permissible limit before to reach yield stress in steel [ C ] stresses in both concrete and steel reach their permissible values simultaneously [ D ] none of the above are correct

Description : In general in the design of a section by limit method, it is assumed that [ A ] the stress in steel to reach its yield limit before concrete failure [ B ] the stress in concrete to ... in both concrete and steel reach their permissible values simultaneously [ D ] none of the above are correct

Last Answer : [ A ] the stress in steel to reach its yield limit before concrete failure

In general in the design of a section by limit method, it is assumed that [ A ] the stress in steel to reach its yield limit before concrete failure [ B ] the stress in concrete to reach its permissible limit before to reach yield stress in steel [ C ] stresses in both concrete and steel reach their permissible values simultaneously [ D ] none of the above are correct

Description : In general in the design of a section by limit method, it is assumed that [ A ] the stress in steel to reach its yield limit before concrete failure [ B ] the stress in concrete to ... in both concrete and steel reach their permissible values simultaneously [ D ] none of the above are correct

Last Answer : [ A ] the stress in steel to reach its yield limit before concrete failure

Which of the following conditions is true for repeated stress? 1. σ m = 0 2. σ m = σ max / 2 3. σ m = σ a 4. σ min = 0 5. σ min = – σ max 6. σ a = σ max / 2 where σ m = mean stress and σ a = stress amplitude a. condition 2 and 3 b. condition 1, 3 and 5 c. condition 2, 4, and 6 d. condition 3,4, 5 and 6

Description : Which of the following conditions is true for repeated stress? 1. σ m = 0 2. σ m = σ max / 2 3. σ m = σ a 4. σ min = 0 5. σ min = - σ max 6. σ a = σ max / 2 where σ m = mean ... amplitude a. condition 2 and 3 b. condition 1, 3 and 5 c. condition 2, 4, and 6 d. condition 3,4, 5 and 6

Last Answer : c. condition 2, 4, and 6

What will happen if stresses induced due to surge in the spring exceeds the endurance limit stress of the spring. a) Fatigue Failure b) Fracture c) None of the listed d) Nipping

Description : What will happen if stresses induced due to surge in the spring exceeds the endurance limit stress of the spring. a) Fatigue Failure b) Fracture c) None of the listed d) Nipping

Last Answer : a) Fatigue Failure

When a coupler nut is subjected to crushing stress, crushing failure can be avoided if _____ a. crushing stress induced is more than permissible crushing stress in the nut b. permissible crushing stress is more than crushing stress induced in the threads c. crushing stress induced is equal to permissible crushing stress d. all of the above

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Last Answer : b. permissible crushing stress is more than crushing stress induced in the threads

While designing screw threads, adequate length of engaged threads between the screw and nut is provided so as to prevent failure of threads due to (A) Direct shear stress (B) Torsional shear stress (C) Tensile stress (D) Compressive stress

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Last Answer : (A) Direct shear stress

The endurance or fatigue limit is defined as the maximum value of the stress which a polished standard specimen can withstand without failure, for infinite number of cycles, when subjected to (a) static load (b) dynamic load (c) static as well as dynamic load (d) completely reversed load

Description : The endurance or fatigue limit is defined as the maximum value of the stress which a polished standard specimen can withstand without failure, for infinite number of cycles, when subjected to (a) static load (b) dynamic load (c) static as well as dynamic load (d) completely reversed load

Last Answer : (d) completely reversed load

For a homogeneous & isotropic body under hydrostatic pressure, which theory of elastic failure does not fail (a) Firstly Maximum Principal Theory (b) Secondly Maximum Shear Stress Theory (c) Thirdly Maximum Principal Energy Theory (d) None

Description : For a homogeneous & isotropic body under hydrostatic pressure, which theory of elastic failure does not fail (a) Firstly Maximum Principal Theory (b) Secondly Maximum Shear Stress Theory (c) Thirdly Maximum Principal Energy Theory (d) None

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Under complex loading, if elastic limit reaches in tension, then failure occurs due to (a) Firstly Maximum principal strain theory (b) Secondly Maximum principal theory of strain energy (c) Thirdly Maximum Principal stress theory (d) None

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Under complex loading, if elastic limit reaches in tension, then failure occurs due to (a) Firstly Maximum principal strain theory (b) Secondly Maximum principal theory of strain energy (c) Thirdly Maximum shear stress theory (d) None

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Last Answer : (d) None

A ductile material may not meet a failure if it has been tested for the theories of failure (a) Firstly Maximum Shear Stress Theory (b) Secondly Maximum Shear Strain Energy Theory (c) Both (a) & (b) (d) None

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Why do we determine principal stresses? a. Failure is due to simple stress or strain b. Failure is due to complex stress or strain c. Both (a) & (b) d. None

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According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to __________ times the yield stress. (A) 0.5 (B) 2 (C) √2 (D) √3/2

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Last Answer : (A) 0.5

For finding out the bending moment for the arm (spoke) of flywheel the arm is assumed as 1. a cantilever beam fixed at the rim and subjected to tangential force at the hub 2. a simply supported beam fixed at hub and rim and carrying uniformly distributed load 3. a cantilever hub fixed at the rim and subjected to tangential force at the rim 4. a fixed beam fixed at hub and rim and carrying uniformly distributed load

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In the analysis, all the principal stresses are assumed as a. Shear stresses b. Compressive stresses c. Tensile stresses d. None

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In the case of an audit of financial statements, which of the following would not be a valid criterion in ascertaining the degree of correspondence between assertions and established criteria? a. International Accounting Standards b. Philippine Accounting Standards c. Philippine Standards on Auditing d. Philippine Financial Reporting Standards

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A flywheel is used, (A) To store and release energy when required during the work cycle (B) To reduce the power capacity of electric motor (C) To reduce the amplitude of speed fluctuations (D) Any one of above functions

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Which of the following are functions of flywheel? a) Store and release energy during work cycle b) Reduce power capacity of the electric motor c) Reduce amplitude of speed fluctuations d) All of the listed

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The criteria for the design of a shaft is the stress at (a) The external surface (b) The axis (c) Any inside layer (d) Any of these

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Which of the following is (are) true? (A) Cast iron has poor tensile strength compared to steel (B) Failure of cast iron flywheel is sudden and total (C) Machinability of cast iron flywheel is poor compared to steel flywheel (D) All of the above

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Which of the following is not true for cast iron flywheels? a) Excellent damping b) Cheap c) Given complex shape d) Sudden failure

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_____ is a surface fatigue failure which occurs when the load on the bearing part exceeds the surface endurance strength of the material. (a) Scoring (b) Pitting (c) Corrosion

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Propagation of fatigue failure is always due to compressive stresses. a) Due to bending b) Due to tensile c) Due to fatigue d) None of the listed

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Standard coarse threads are equally strong in failure by shear and failure by tension, if the height of nut is (A) h = 0.4 d (B) h = 0.6 d (C) h = 0.5 d (D) h = d

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The connecting rod bolts are tightened up with the initial tension greater than external load so that (A) Failure of bolt will be static (B) The resultant load on bolt will not be affected by external cyclic load (C) The bolt will not fail by fatigue although the external load is fluctuating (D) All the three

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Failure of a material is called fatigue when it fails (a) at the elastic limit (b) below the elastic limit (c) at the yield point (d) below the yield point

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There is sufficient plastic deformation prior to fatigue failure, which gives a warning well in advance. a) True b) False

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Fatigue failure is time dependent failure. a) True b) False

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The phenomenon of decreased resistance of the materials to fluctuating stresses is the main characteristic of _____ failure. a) Fracture b) Fatigue c) Yielding d) None of the mentioned

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For a homogeneous & isotropic body under hydrostatic pressure, which theory of elastic failure fails (a) Firstly Maximum Principal Theory (b) Secondly Maximum Principal strain Theory (c) Thirdly Maximum Principal Energy Theory (d) None

Description : For a homogeneous & isotropic body under hydrostatic pressure, which theory of elastic failure fails (a) Firstly Maximum Principal Theory (b) Secondly Maximum Principal strain Theory (c) Thirdly Maximum Principal Energy Theory (d) None

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Theories of elastic failure establishes the (a) Firstly Reasons of failure (b) Secondly Reasons of safety (c) Both (a) & (b) (d) None

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Theories of elastic failure is the (a) Firstly analysis of the various failures (b) Secondly analysis of the strength of a material (c) Both (a) & (b) (d) None

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Theories of elastic failure help to recognize (a) Weak materials (b) Strong materials (c) Both weak and strong materials (d) None

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Theories of elastic failure help in the (a) Material development (b) Development of method of manufacture (c) Both (a) & (b) (d) None

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