The notch sensitivity q is expressed in terms of fatigue stress concentration factor Kf and theoretical stress

concentration factor Kt as

(A) (Kf + 1)/ (Kt + 1)

(B) (Kf - 1)/ (Kt - 1)

(C) (Kt + 1)/ (Kf + 1)

(D) (Kt - 1)/ (Kf - 1)

1 Answer

Answer :

(B) (Kf - 1)/ (Kt - 1)

Related questions

Description : Notch sensitivity (q) is given by the equation _______ where K f = fatigue stress concentration factor and K t = theoretical stress concentration factor a. ( K f + 1 ) / ( K t – 1 ) b. ( K f – 1 ) / ( K t – 1 ) c. ( K f + 1 ) / ( K t + 1 ) d. ( K f - 1 ) / ( K t + 1 )

Last Answer : b. ( K f – 1 ) / ( K t – 1 )

Description : Calculate fatigue stress concentration factor, when theoretical stress concentration factor is 1.62 and notch sensitivity is equal to 0.9 a. 1.558 b. 3.358 c. 1.162 d. None of the above

Last Answer : a. 1.558

Description : If a flat plate with a circular hole is subjected to tensile force, then its theoretical stress concentration factor is? a) 2 b) 3 c) 4 d) 1

Last Answer : b) 3

Description : Explain Notch Sensitivity. State The Relation Between Stress Concentration Factor And Notch Sensitivity?

Last Answer : Notch sensitivity (q) is the degree to which the theoretical effect of stress concentration is actually reached. The relation is, Kf = 1 + q (Kt-1)

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 : 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 : 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

Description : In S-N diagram, the graph plotted between fatigue strength and number of stress cycles becomes horizontal for which type of materials? a. Ferrous materials b. Non-ferrous materials c. Both a. and b. d. None of the above

Last Answer : a. Ferrous materials

Description : Deformation that occurs due to stress over a period of time is known as ____________ a) Wear resistance b) Fatigue c) Creep d) Fracture

Last Answer : c) Creep

Description : Wahl factor to account for direct shear stress and stress concentration due to curvature for helical springs is given by, (A) (4C - 1/4C - 4) + 0.615/C (B) (4C - 1/4C + 4) + 0.615/C (C) (4C + 1/4C - 4) + 0.615/C (D) (4C + 1/4C + 4) + 0.615/C

Last Answer : (A) (4C - 1/4C - 4) + 0.615/C

Description : For a helical torsion sprig, the stress concentration factor at outer fibre is? Give spring index=5. a) 0.78 b) 0.87 c) 1.87 d) 0.69

Last Answer : b) 0.87

Description : For a helical torsion sprig, the stress concentration factor at inner fibre is? Give spring index=5. a) 1.005 b) 1.175 c) 1.223 d) 1.545

Last Answer : b) 1.175

Description : In which of the following case stress concentration factor is ignored? a) Ductile material under static load b) Ductile material under fluctuating load c) Brittle material under static load

Last Answer : a) Ductile material under static load

Description : For an elliptical hole on a flat plate, if width of the hole in direction of the load decrease, Stress Concentration Factor will______ a) Increase b) Decrease c) Remains constant d) Can’t be determined. Varies from material to material

Last Answer : a) Increase

Description : Stress Concentration Factor is the ratio of nominal stress obtained by elementary equations for minimum cross- section and highest value of actual stress near discontinuity. a) True b) False

Last Answer : b) False

Description : Wahl suggested the correction in the stress factor to account for a. the additional transverse shear stress b. stress concentration c. fatigue stress d. axial stress

Last Answer : b. stress concentration

Description : A perfect gas has a value of R= 319.2 J/ kf.K and k= 1.26. If 120 kJ are added to 2.27 kf\g of this gas at constant pressure when the initial temp is 32.2°C? Find T2.  a. 339.4 K  b. 449.4 K  c. 559.4K  d. 669.4K formula: cp = kR/ k-1 Q= mcp(T2-T1)

Last Answer : 339.4 K

Description : Keyed joints never lead to stress concentration on shafts. a) True b) False

Last Answer : b) False

Description : The keyway, (A) Reduces strength of shaft (B) Reduces rigidity of shaft (C) Increases stress concentration (D) All of above

Last Answer : (D) All of above

Description : Stress concentration is caused due to A. Variation in properties of material from point to point in a member B. Pitting at points or areas at which loads on a member are applied C. Abrupt change of section D. All of the above

Last Answer : D. All of the above

Description : Which of the following reduces the stress concentration? a) Use of multiple notches b) Drilling additional holes c) Removal of undesired material d) Each of the mentioned

Last Answer : d) Each of the mentioned

Description : Use of multiple notches in a V shaped flat plate will a) Reduce the stress concentration b) Increase the stress concentration c) No effect d) Cannot be determined

Last Answer : a) Reduce the stress concentration

Description : Is it logical to use fluid analogy to understand the phenomenon of stress concentration? a) True b) False

Last Answer : a) True

Description : Stress concentration is defined as the localization of high stresses due to irregularities present in the component and no changes of the cross section. a) True b) False

Last Answer : b) False

Description : What Are The Factors That Affect Notch Sensitivity?

Last Answer : The factors effecting notch sensitivity are: 1. Material 2. Notch radius 3. Size of component 4. Type of loading 5. Grain Structure

Description : Maximum shear stress in terms of principal stresses is a. Firstly (σ 1 +σ 2 )/2 b. Secondly (σ 1 /σ 2 ) c. Thirdly (σ 1 –σ 2 )/2 d. None

Last Answer : c. Thirdly (σ 1 –σ 2 )/2

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 : Scoring is a ________ phenomenon. (a) stick-slip (b) fracture (c) fatigue (d) in-out

Last Answer : (a) stick-slip

Description : Extreme Pressure (EP) additives cause ______ wear in the bearing parts. (a) abrasive (b) corrosive (c) pitting (d) fatigue

Last Answer : (b) corrosive

Description : Scoring is a ________ phenomenon. a) Stick-slip b) Fracture c) Fatigue d) In-out

Last Answer : a) Stick-slip

Description : 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

Last Answer : b) Due to tensile

Description : 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 ... ) The bolt will not fail by fatigue although the external load is fluctuating (D) All the three

Last Answer : (D) All the three

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 yield point in static loading is ............... as compared to fatigue loading. (a) higher (b) lower (c) same

Last Answer : (a) higher

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 : 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 : Does ASME Standard take into consideration shock and fatigue factors? a) Yes b) No

Last Answer : a) Yes

Description : Does ASME Standard take into consideration shock and fatigue factors? a) Yes b) No

Last Answer : a) Yes

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

Last Answer : b) False

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

Last Answer : a) True

Description : 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

Last Answer : b) Fatigue

Description : The ability of materials to develop a characteristic behavior under repeated loading known as ___________ a) Toughness b) Resilience c) Hardness d) Fatigue

Last Answer : d) Fatigue

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 : The theoretical stress-strain curve of the concrete in the Limit State design of structures is correspondingly reduced by the factor [ A ] 0.35 [ B ] 0.5 [ C ] 0.67 [ D ] 0.75

Last Answer : [ C ] 0.67

Description : The theoretical stress-strain curve of the concrete in the Limit State design of structures is correspondingly reduced by the factor [ A ] 0.35 [ B ] 0.5 [ C ] 0.67 [ D ] 0.75

Last Answer : [ C ] 0.67

Description : Life of bearing is expressed in a.. A. Billions of revolution B. Lacks of revolution C. Hundreds of revolution D. None of these

Last Answer : A. Billions of revolution

Description : Pick out the wrong statement. (A) The Reynolds analogy for mass transfer is given by Lewis relation and is applicable, when Schmidt number is one (B) Sherwood number for flow in pipes can be expressed ... flux of a component A in binary mixture of A and B is given by - Dab'.dCA/dz

Last Answer : (C) According to film theory for equimolar counter diffusion, the mass transfer coefficient is given by DAB(B)P - 3, Q - 2

Description : Nucleotides and nucleic acids concentration are often also expressed in terms of (A) ng (B) mg (C) meq (D) OD at 260 nm

Last Answer : Answer : D

Description : The protecting power of lyophilic colloidal sol is expressed in terms of (1) Oxidation number (2) Coagulation value (3) Gold number (4) Critical miscelle concentration

Last Answer : Gold number