Description : Maximum principal stress theory is applicable to (a) Ductile materials (b) Brittle materials (c) Composite materials (d) None
Last Answer : (b) Brittle materials
Description : Maximum total strain energy theory is applicable to (a) Ductile materials (b) Brittle materials (c) Composite materials (d) None
Last Answer : (a) Ductile materials
Description : Maximum principal strain theory is applicable to (a) Ductile materials (b) Brittle materials (c) Composite materials (d) None
Description : 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
Last Answer : (c) Both (a) & (b)
Description : Maximum Principal Stress Theory is not good for brittle materials. a) True b) False
Last Answer : b) False
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 : 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 : 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 : Which theory is perfect for design of shaft when it mades from brittle materials........... A. Rankine theory B. Guest's theory C. Vonmises theory D. St. Venant's theory.
Last Answer : A. Rankine theory
Description : Among maximum shear stress theory and distortion energy theory, which gives the higher value shear yield strength? a) Maximum shear stress theory b) Distortion energy theory c) Both give equal values d) Vary from material to material
Last Answer : b) Distortion energy theory
Description : Maximum shear stress theory is used for (A) Cast iron shafts (B) Steel shafts (C) Flexible shafts (D) Plastic shafts
Last Answer : (B) Steel shafts
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
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
Last Answer : (a) Firstly Maximum Principal Theory
Description : 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
Last Answer : (d) None
Description : Under maximum shear stress theory, maximum shear stress is equal to (a) Allowable stress in tension (b) Allowable stress in compression (c) Allowable stress in shear (d) None
Last Answer : (c) Allowable stress in shear
Description : Maximum shear stress theory is also called as (a) Guest’s theory (b) Haigh theory (c) Rankine theory (d) None
Last Answer : (a) Guest’s theory
Description : Maximum shear stress theory is also called as (a) Beltrami theory (b) Haigh theory (c) Tresca theory (d) None
Last Answer : (c) Tresca theory
Description : Maximum shear stress theory is also called as (a) Beltrami theory (b) Coulomb’s theory (c) Haigh theory (d) None
Last Answer : (b) Coulomb’s theory
Description : Under maximum principal stress theory, maximum principal stress is equal to (a) Allowable stress in tension (b) Allowable stress in compression (c) Allowable stress in shear (d) None
Last Answer : (a) Allowable stress in tension
Description : Distortion energy theory is slightly liberal as compared to maximum shear stress theory. a) True b) False
Last Answer : a) True
Description : The region of safety in maximum shear stress theory contains which of the given shape a) Hexagon b) Rectangle c) Square d) None of the mentioned
Last Answer : a) Hexagon
Description : A ductile material may not meet a failure if it has been tested for the theories of failure (a) Firstly Maximum Principal Theory (b) Secondly Maximum Principal Strain Theory (c) Thirdly Maximum principal strain energy theory (d) None
Description : Which of the following theories of failure is most appropriate for a brittle material? (a) Maximum principal strain theory (b) Maximum principal stress theory (c) Maximum shear stress theory (d) Maximum strain energy theory
Last Answer : (b) Maximum principal stress theory
Description : Distortion energy theorem is not recommended for ductile materials. a) True b) False
Description : Which theories of failure are used for (a) ductile materials, and (B) brittle materials ?
Last Answer : For ductile materials, theories of failure used are maximum shear stress theory, and maximum energy of distortion theory; while for brittle materials, theory of maximum principal stress, and maximum strain are used.
Description : A dense structure of grinding wheel is not used for the (A) Ductile material (B) Hard materials (C) Brittle materials (D) Finishing cuts
Last Answer : A) Ductile material
Description : The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as (A) Rigid (B) Tough (C) Ductile (D) Plastic
Last Answer : Option C
Description : Which Theories Of Failure Are Used For? (a) Ductile Materials (b) Brittle Materials?
Last Answer : For ductile materials, theories of failure used are maximum shear stress theory and maximum energy of distortion theory; For brittle materials, the theory of maximum principal stress and maximum strain are used.
Description : Which stress strain curve is more steep (a) For a ductile material (b) For a brittle material (c) For a pure metal (d) None
Last Answer : b) For a brittle material
Description : The maximum shear stress in spring wire is induced at (A) Inner surface of the coil (B) Outer surface of the coil (C) Central surface of the coil (D) End coils
Last Answer : (A) Inner surface of the coil
Description : Parallel fillet weld and transverse fillet weld both have the plane in which maximum shear stress occurs at 45’ to the leg dimension. a) True b) False
Description : Maximum shear stress in transverse fillet weld of leg h and length l is a) P/hl b) 1.21P/hl c) P/1.21hl d) None of the listed
Last Answer : b) 1.21P/hl
Description : According to the ASME code, maximum allowable shear stress is taken as X% of yield strength or Y% of ultimate strength. a) X=30 Y=18 b) X=30 Y=30 c) X=18 Y=18 d) X=18 Y=30
Last Answer : a) X=30 Y=18
Description : Maximum shear stress is equal to (a) (σ1 –σ2)/2 (b) (σ1 + σ2)/2 (c) (σ1 + 2σ2)/2 (d) None
Last Answer : (a) (σ1 –σ2)/2
Description : Ellipse of stress is used to find a. Resultant stress on any plane in a bi-axial stress system b. Resultant stress on any plane in a general two dimensional system c. Maximum shear stress d. Location of planes of maximum shear stress
Last Answer : a. Resultant stress on any plane in a bi-axial stress system
Description : In a general two dimensional stress system, planes of maximum shear stress are inclined at ___ with principal planes. a. 90 degree b. 180 degree c. 45 degree d. 60 degree
Last Answer : c. 45 degree
Description : Principal planes are those planes on which a. Normal stress is maximum b. Normal stress is minimum c. Normal stress is either maximum or minimum d. Shear stress is maximum
Last Answer : c. Normal stress is either maximum or minimum
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 : Does a plane of maximum shear stress contain a? (a) Normal stress (b) Bending stress (c) Torsional shear stress (d) None
Last Answer : (a) Normal stress
Description : The magnitude of maximum shear stress is (a) ± (1/2)[ ((σx –σy) 2 + 4 τ 2 )) 0.5 ] (b) ± (1/2)[ (1/2)((σx –σy) 2 + 4 τ 2 )) 0.5 ] (c) ± (1/2)[ ((1/2)(σx –σy) 2 + 4 τ 2 )) 0.5 ] (d) None
Last Answer : (a) ± (1/2)[ ((σx –σy) 2 + 4 τ 2 )) 0.5 ]
Description : Maximum shear stress is (a) Average sum of principal stresses (b) Average difference of principal stresses (c) Average sum as well as difference of principal stresses (d) None
Last Answer : (b) Average difference of principal stresses
Description : The bending moment ‘M’ and a torque ‘T’ is applied on a solid circular shaft. If the maximum bending stress equals to maximum shear stress developed, then ‘M’ is equal to (A) T/2 (B) T (C) 2 T (D) 4 T
Last Answer : (A) T/2
Description : Maximum principle stress theory is used for (A) Cast iron shafts (B) Steel shafts (C) Aluminum shafts (D) Plastic shafts
Last Answer : (A) Cast iron shafts
Description : 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
Last Answer : (c) Thirdly Maximum Principal stress theory
Description : Maximum principal theory is also known as (a) Beltrami Theory (b) Maximum normal stress theory (c) Saint Venant’s theory (d) None
Last Answer : (b) Maximum normal stress theory