Description : The allowable shear stress in stiffened webs of mild steel beams decreases with (a) Decrease in the spacing of the stiffeners (b) Increase in the spacing of the stiffeners (c) Decrease in the effective depth (d) Increase in the effective depth
Last Answer : (b) Increase in the spacing of the stiffeners
Description : The allowable shear stress in the web of mild steel beams decreases with (a) Decrease in h/t ratio (b) Increase in h/t ratio (c ) Decrease in thickness (d) Increase in height Where h is the height and t is the thickness
Last Answer : (b) Increase in h/t ratio
Description : Dead mild steel, which contains 0.10 to 0.15 percent carbon is used for making (A) Shafts (B) Flanges (C) Gears (D) Shear blades
Last Answer : (B) Flanges
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 : The allowable tensile stress in mild steel stirrups, reinforced cement concrete, is (A) 1400 kg/cm2 (B) 190 kg/cm2 (C) 260 kg/cm2 (D) 230 kg/cm
Last Answer : Answer: Option A
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 : Draw stress-strain diagram for mild-steel rod and show different limits on it.
Last Answer : Where, A = Limit of proportionality B = Elastic limit C = Upper yield point D = Lower yield point E = Ultimate load point F = Breaking point
Description : Steel beam theory is used for (A) Design of simple steel beams (B) Steel beams encased in concrete (C) Doubly reinforced beams ignoring compressive stress in concrete (D) Beams if shear exceeds 4 times allowable shear stress
Last Answer : Answer: Option C
Description : When shear stress exceeds the permissible limit in a slab, then it is reduced by (A) Increasing the depth (B) Providing shear reinforcement (C) Using high strength steel (D) Using thinner bars but more in number
Description : When the steel bars are embedded in concrete. The concrete after setting, adheres to the surface of the bars and thus resist any force that tends to pull or push this road. The intensity of this adhesive force is called. (a) Bond stress (b) Shear stress (c) Compressive stress (d) All of these
Last Answer : (a) Bond stress
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
Last Answer : b) False
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 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 : 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 : 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 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 : 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 applicable to (a) Ductile materials (b) Brittle materials (c) Composite materials
Last Answer : (a) Ductile materials
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 : 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 : 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 : 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 : The maximum magnitude of shear stress due to shear force F on a rectangular section of area A at the neutral axis, is (A) F/A (B) F/2A (C) 3F/2A (D) 2F/3A
Last Answer : (C) 3F/2A
Description : Pick up the correct statement from the following: (A) The bending stress in a section is zero at its neutral axis and maximum at the outer fibres (B) The shear stress is zero at the outer ... (C) The bending stress at the outer fibres, is known as principal stress (D) All the above
Last Answer : (D) All the above
Description : A shaft is subjected to bending moment M and a torque T simultaneously. The ratio of the maximum bending stress to maximum shear stress developed in the shaft, is (A) M/T (B) T/M (C) 2M/T (D) 2T/M
Last Answer : (C) 2M/T
Description : If the strain energy stored per unit volume in a hollow shaft subjected to a pure torque when t attains maximum shear stress fs the ratio of inner diameter to outer diameter, is 17/64 (fs/N) (A) 1/2 (B) 1/3 (C) 1/4 (D) 1/5
Last Answer : (C) 1/4
Description : Pick up the correct statement from the following: (A) Mcg = M M 2 + r2 ) where letters carry their usual meanings (B) Tcp = m 2 + T2 )where ... maximum shear stress caused by the combined bending and torsion, is called equivalent torque (D) All the above
Description : The ratio of maximum shear stress to average shear stress of a circular beam, is (A) 2/3 (B) 3/2 (C) 3/4 (D) 4/3
Last Answer : (D) 4/3
Description : If a solid shaft (diameter 20 cm, length 400 cm, N = 0.8 × 105 N/mm2 ) when subjected to a twisting moment, produces maximum shear stress of 50 N/mm2 , the angle of twist in radians, is (A) 0.001 (B) 0.002 (C) 0.0025 (D) 0.003
Last Answer : (C) 0.0025
Description : Maximum shear stress theory for the failure of a material at the elastic limit, is known (A) Guest's or Trecas' theory (B) St. Venant's theory (C) Rankine's theory (D) Haig's theory
Last Answer : (A) Guest's or Trecas' theory
Description : shaft subjected to a bending moment M and a torque T, experiences (A) Maximum bending stress = 32M d 3 (B) Maximum shear stress = 16 T d 3 (C) Both (a) and (b) (D) Neither (a) nor (b)
Last Answer : (C) Both (a) and (b)
Description : Along the principal plan subjected to maximum principal stress (A) Maximum shear stress acts (B) Minimum shear stress acts (C) No shear stress acts (D) None of these
Last Answer : (C) No shear stress acts
Description : The shear stress at any section of a shaft is maximum (A) At the centre of the section (B) At a distance r/2 from the centre (C) At the top of the surface (D) At a distance 3/4 r from the centre
Last Answer : (C) At the top of the surface