Failure of a material is termed as fatigue failure, if it fails below the
yield point. The resistance to fatigue failure of a material is measured by the
(A) Ultimate tensile strength (U.T.S.)
(B) Endurance limit
(C) Elastic limit
(D) None of these

1 Answer

Answer :

(B) Endurance limit

Related questions

Description : Fatigue resistance of a material is measured by the (A) Elastic limit (B) Ultimate tensile strength (C) Young's modulus (D) Endurance limit

Last Answer : (D) Endurance limit

Description : The resistance to fatigue of a material is measured by (a) elastic limit (b) Young's modulus (c) ultimate tensile strength (d) endurance limit

Last Answer : (d) endurance limit

Description : Factor of safety for fatigue loading is the ratio of (a) elastic limit to the working stress (b) Young's modulus to the ultimate tensile strength (c) endurance limit to the working stress (d) elastic limit to the yield point

Last Answer : (c) endurance limit to the working stress

Description : Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails (A) Below the yield point (B) Above the yield point (C) Below the elastic limit (D) At the elastic limit

Last Answer : Option A

Description : 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

Last Answer : (d) below the yield point

Description : When a material is subjected to fatigue loading, the ratio of the endurance limit to the ultimate tensile strength is (a) 0.20 (b) 0.35 (c) 0.50 (d) 0.65

Last Answer : (c) 0.50

Description : The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the (A) Fatigue strength (B) Creep strength (C) Resilience (D) Endurance limit

Last Answer : D) Endurance limit

Description : In a ductile material, the strength are (a)Firstly Ultimate >yield > elastic limit (b) Secondly Ultimate > yield =elastic limit (c) Thirdly Ultimate=yield=elastic limit (d) None

Last Answer : (a)Firstly Ultimate >yield > elastic limit

Description : In a brittle material, the strength are (a) Firstly Ultimate >yield > elastic limit (b) Secondly Ultimate > yield =elastic limit (c) Thirdly Ultimate=yield=elastic limit (d) None

Last Answer : (c) Thirdly Ultimate=yield=elastic limit

Description : Cast iron has (A) Very high tensile strength (B) High ductility (C) High malleability (D) Elastic limit close to ultimate breaking strength

Last Answer : (D) Elastic limit close to ultimate breaking strength

Description : Cast iron has (A) High ductility (B) High malleability (C) Very high tensile strength (D) Its elastic limit very close to ultimate breaking strength

Last Answer : (D) Its elastic limit very close to ultimate breaking strength

Description : Cast iron is having very high (A) Proximity between its elastic limit and ultimate breaking strength (B) Ductility (C) Tensile strength (D) All (A), (B) and (C)

Last Answer : (A) Proximity between its elastic limit and ultimate breaking strength

Description : _____ 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

Last Answer : (b) Pitting

Description : Slow plastic deformation of metals under a constant stress is termed as __________ failure. (A) Fatigue (B) Endurance (C) Creep (D) None of these

Last Answer : (C) Creep

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

Description : Wohler test is a destructive test to find out the __________ strength of a prepared metal specimen. (A) Creep (B) Fatigue (C) Endurance (D) Tensile

Last Answer : (B) Fatigue

Description : Distortion or change in shape of a cast partial denture clasp during its clinical use probably indicates that the: A. Ductility was too low B. Hardness was too great C. Ultimate tensile strength was too low D. Tension temperature was too high E. Elastic limit was exceeded

Last Answer : E. Elastic limit was exceeded

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

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

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

Description : The Mohr's straight theory is based on the following fact: (A) Material fails essentially by shear (B) Ultimate strength of the material is determined by the stress in the plane of slip (C) Failure criterion is independent of the intermediate principal stress (D) All the above

Last Answer : Answer: Option D

Description : When the steel is subjected to normalising, its __________ decreases. (A) Yield point (B) Ductility (C) Ultimate tensile strength (UTS)

Last Answer : (B) Ductility

Description : High endurance limit of carburised machine parts is because of the fact that carburisation (A) Suppresses any stress concentration produced in the parts (B) Enhances the yield point of the material (C) Introduces a compressive layer on the surface (D) Produces a better surface finish

Last Answer : (C) Introduces a compressive layer on the surface

Description : spring material should have low (A) Elastic limit (B) Deflection value (C) Fatigue resistance (D) None of these

Last Answer : Option D

Description : spring material should have low (A) Elastic limit (B) Deflection value (C) Fatigue resistance (D) None of these

Last Answer : Option D

Description : Notched bar test is used for testing the __________ of a material. (A) Impact strength (B) Endurance limit (C) Machinability (D) Corrosion resistance

Last Answer : (A) Impact strength

Description : Stresses encountered in the metal forming processes are less than the __________ of the material. (A) Fracture strength (B) Yield strength (C) Elastic limit (D) Limit of proportionality

Last Answer : Option A

Description : Reduction in the grain size reduces the __________ of the material. (A) Fatigue resistance (B) Tensile strength (C) Creep resistance (D) All (A), (B) & (C)

Last Answer : (C) Creep resistance

Description : Reduction in the grain size reduces the __________ of the material. (A) Fatigue resistance (B) Tensile strength (C) Creep resistance (D) All (A), (B) & (C)

Last Answer : (D) All (A), (B) & (C)

Description : The highest stress that a material can withstand for a specified length of time without excessive deformation is called the __________ strength. (A) Creep (B) Endurance (C) Fatigue (D) None of these

Last Answer : Option A

Description : The stress at which extension of the material takes place more rapidly as compared to the increase in load is termed as the __________ point of the material. (A) Elastic (B) Ultimate (C) Yielding (D) Breaking

Last Answer : (C) Yielding

Description : The most important property for the spring material is (a) High elastic limit (b) High deflection value (c) Resistance to fatigue and shock (d) All of these

Last Answer : (d) All of these

Description : The most important property for the spring material is (a) High elastic limit (b) High deflection value (c) Resistance to fatigue and shock (d) All of these

Last Answer : (d) All of these

Description : Consider the following salient points in a stress-strain curve of a mild steel bar: 1. Yield point 2. Braking point 3. Yield plateau 4 . Proportionality limit 5. Ultimate point The correct sequence in which they occur while testing the mild ... , 5 and 2 (c) 4, 1, 3, 5 and 2 (d) 1, 4, 2, 3 and 5

Last Answer : (c) 4, 1, 3, 5 and 2

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

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

Description : When stress is increased beyond elastic limit and material is permanently changed this property is a) Permanent stress b) Elasticity c) Yield strength d) Plasticity

Last Answer : d) Plasticity

Description : Hooke’s law is applicable within (a)Elastic limit (b)Plastic limit (c)Fracture point (d) Ultimate strength

Last Answer : (a)Elastic limit

Description : A member which is subjected to reversible tensile or compressive stress may fail at a stress lower  than the ultimate stress of the material. This property of metal, is called  (A) Plasticity of the ... ) Elasticity of the metal  (C) Fatigue of the metal  (D) Workability of the metal

Last Answer : (C) Fatigue of the metal

Description : Yield strength of a material is determined by the __________ test. (A) Creep (B) Tension (C) Compression (D) Endurance

Last Answer : Option B

Description : The property of the bearing material to yield and adopt its shape to that of journal is called (A) Embeddability (B) Conformability (C) Viscosity (D) Endurance limit stress

Last Answer : (B) Conformability

Description : Fatigue failure of a material results from __________ stress. (A) Tensile (B) Compressive (C) Fluctuating (D) None of these

Last Answer : (C) Fluctuating

Description : Fatigue failure of a material may occur, when it is subjected to __________ stress. (A) Fluctuating (B) Tensile (C) Compressive (D) Torsion

Last Answer : (A) Fluctuating

Description : Non-ferrous metals and hard steels do not exhibit a definite yield point, when pulled in the testing machine and hence for these cases, a better measure of their elastic properties is defined by the __________ stress. (A) Ultimate (B) Yield point (C) Proof (D) None of these

Last Answer : (C) Proof

Description : The connecting rod bolts are tightened up so that the initial tightening stress (A) Approaches yield point (B) Approaches endurance limit (C) Approaches (yield point stress/factor of safety) (D) Approaches (endurance limit stress/factor of safety)

Last Answer : (A) Approaches yield point

Description : On decreasing the grain size of a polycrystalline material, the property most likely to deteriorate is (A) Creep (B) Toughness (C) Tensile strength (D) Fatigue

Last Answer : (B) Toughnes

Description : At yield point' of a copper wire A. the load hasn't exceeded the elastic limit yet; so, Hooke's law applies B. the load has already exceeded the elastic limit and the material has become ... stage has passed and the wire has snapped already D. Like Brass and Bronze, Copper has no yield poin

Last Answer : the load has already exceeded the elastic limit and the material has become plastic

Description : The limit beyond which the material does not behave elastically is known as (a) Proportional limit (b) Elastic limit (c) Plastic limit (d) Yield Point

Last Answer : (b) Elastic limit

Description : Rittinger number which designates the new surface produced per unit of mechanical energy absorbed by the material being crushed, depends on the (A) State or manner of application of the crushing force (B) Ultimate strength of the material (C) Elastic constant of the material (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Description : The ductility of metal is usually expressed in terms of the: A. Yield strength (point where the material is not longer elastic) B. Percent elongation C. Modulus of elasticity (stiffness of the material)

Last Answer : B. Percent elongation