Description : If yielding strength=400N/mm2, the find the permissible shear stress according to ASME standards. a) 72 N/mm2 b) 76 N/mm2 c) 268 N/mm2 d) 422 N/mm2
Last Answer : a) 72 N/mm2
Description : According to 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 : Find the shear stress in the spring wire used to design a helical compression sprig if a load of 1200N is applied on the spring. Spring index is 6, and wire diameter 7mm. a) 452.2N/mm² b) 468.6N/mm² c) 512.2N/mm² d) None of the listed
Last Answer : b) 468.6N/mm²
Description : Calculate the shaft diameter on rigidity basis if torsional moment is 196000N-mm, length of shaft is 1000mm. Permissible angle of twist per meter is 0.5’ and take G=79300N/mm². a) None of the listed b) 41.2mm c) 35.8mm d) 38.8mm
Last Answer : b) 41.2mm
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
Description : A circular pipe is subjected to maximum shear force of 60 kN. What is the diameter of the pipe if maximum allowable shear stress is 5 Mpa? a. 27.311 mm b. 75.56 mm c. 142.72 mm d. 692.10 mm
Last Answer : c. 142.72 mm
Description : A seamless cylinder of storage capacity of 0.03mᵌis subjected to an internal pressure of 21MPa. The ultimate strength of material of cylinder is 350N/mm².Determine the thickness of the cylinder if it is twice the diameter of the cylinder. a) 12mm b) 4mm c) 8mm d) 16mm
Last Answer : c) 8mm
Description : A seamless cylinder of storage capacity of 0.03mᵌis subjected to an internal pressure of 21MPa. The ultimate strength of material of cylinder is 350N/mm².Determine the length of the cylinder if it is twice the diameter of the cylinder. a) 540mm b) 270mm c) 400mm d) 350mm
Last Answer : a) 540mm
Description : The piston rod of a hydraulic cylinder exerts an operating force of 10kN. The allowable stress in the cylinder is 45N/mm². Calculate the thickness of the cylinder using Lame's equation. Diameter of the cylinder is 40mm and ... is 10MPa. a) 2.05mm b) 4.2mm c) 5.07mm d) None of the listed
Last Answer : c) 5.07mm
Description : The permissible diagonal tensile stress in reinforced brick work is (A) About 0.1 N/mm² (B) Zero (C) 0.3 N/mm² to 0.7 N/mm² (D) About 1.0 N/m2
Last Answer : Answer: Option A
Description : If the permissible stress in steel in tension is 140 N/mm², then the depth of neutral axis for a singly reinforced rectangular balanced section will be (A) 0.35 d (B) 0.40 d (C) 0.45 d (D) Dependent on grade of concrete also
Last Answer : Answer: Option B
Description : The strength of a beam depends upon (a) Its section modulus (b) Permissible bending stress (c) Both (a) and (b) (d) None of these
Last Answer : (a) Its section modulus
Description : A water main 1 m in diameter contains a fluid having pressure 1 N/mm2. If the maximum permissible tensile stress in the metal is 20 N/mm2, th thickness of the metal required would be a) 2 cm b) 2.5cm c) 1 cm d) 0.5 cm
Last Answer : b) 2.5cm
Description : A transmission shaft subjected to bending loads must be designed on the basis of (a) maximum normal stress theory (b) maximum shear stress theory (c) maximum normal stress and maximum shear stress theories (d) fatigue strength
Last Answer : (a) maximum normal stress theory
Description : Strength of a shaft a. Is equal to maximum shear stress in the shaft at the time of elastic failure b. Is equal to maximum shear stress in the shaft at the time of rupture c. Is equal to torsional rigidity d. Is ability to resist maximum twisting moment
Last Answer : d. Is ability to resist maximum twisting moment
Description : A beam of uniform strength has a. same cross-section throughout the beam b. same bending stress at every section c. same bending moment at every section d. same shear stress at every section
Last Answer : b. same bending stress at every section
Description : 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
Last Answer : (A) 0.5
Description : A solid shaft has diameter 80 mm. It is subjected to a torque of 4 KNm. The maximum shear stress induced in the shaft would be (a) 75/p N/mm2 (b) 250/p N/mm2 (c) 125/p N/mm2 (d) 150/p N/mm2
Last Answer : (c) 125/p N/mm2
Description : Torque and bending moment of 100 kN.m and 200 kN.m acts on a shaft which has external diameter twice of internal diameter. What is the external diameter of the shaft which is subjected to a maximum shear stress of 90 N/mm2? a. 116.5 mm b. 233.025 mm c. 587.1 mm d. 900 mm
Last Answer : c. 587.1 mm
Description : What is the maximum shear stress induced in a solid shaft of 50 mm diameter which is subjected to both bending moment and torque of 300 kN.mm and 200 kN.mm respectively? a. 9.11 N/mm2 b. 14.69 N/mm2 c. 16.22 N/mm2 d. 20.98 N/mm2
Last Answer : b. 14.69 N/mm2
Description : What is the shear stress acting on the outer surface of a hollow shaft subjected to a torque of 100 Nm?(The inner and outer diameter of the shaft is 15 mm and 30 mm respectively.) a. 50.26 N/mm2 b. 40.24 N/mm2 c. 20.120 N/mm2 d. 8.74 N/mm2
Last Answer : c. 20.120 N/mm2
Description : A square object of 4 mm is subjected to a force of 3000 N. What is the maximum allowable shear stress acting on it? a. 250.14 mm2 b. 281.25 mm2 c. 400.32 mm2 d. 500 mm2
Last Answer : b. 281.25 mm2
Description : What is the shear stress acting along the neutral axis of triangular beam section, with base 60 mm and height 150 mm, when shear force of 30 kN acts? a. 15.36 N/mm2 b. 10.6 N/mm2 c. 8.88 N/mm2 d. Insufficient data
Last Answer : c. 8.88 N/mm2
Description : What is the average shear stress acting on a rectangular beam, if 50 N/mm2is the maximum shear stress acting on it? a. 31.5 N/mm2 b. 33.33 N/mm2 c. 37.5 N/mm2 d. 42.5 N/mm2
Last Answer : b. 33.33 N/mm2
Description : A leaf spring consists of 3 extra full length leaves and 14 graduated length leaves. The maximum force that can act on the spring is 70kN and the distance between eyes of the spring is 1.2m. Width and thickness of the ... /mm², calculate the initial nip. (a) 26.8mm (b) 24.9mm (c) 22.5mm (d)23.1mm
Last Answer : b) 24.9mm
Description : Find total number coils in a spring having square and ground ends. Deflection in the spring is 6mm when load of 1100N is applied. Modulus of rigidity is 81370N/mm². Wire diameter and pitch circle diameter are 10mm and 50mm respectively. a) 7 b) 6 c) 5 d) 4
Last Answer : a) 7
Description : According to I.S code in actual design , maximum permissible deflection is limited to -----------. a.(span/200) b.(span/325) c.(span /525) d.none of the above.
Last Answer : b.(span/325)
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 : Most important features of any spring are (a) Deflection, stiffness and strength (b) Stiffness, bending and shear strengths (c) Strain energy, deflection and strength (d) None
Last Answer : (c) Strain energy, deflection and strength
Description : A compression spring is made of music wire of 2 mm diameter having a shear strength and shear modulus of 800 Mpa and 80 Gpa respectively. The mean coil diameter is 20mm, free length is 40 mm, and the number ... by 8 times b. decreased by 2 times c. increased by 2 times d. decreased by 8 times
Last Answer : a. increased by 8 times
Description : Strength of a rivet is a. Strength in shear b. Strength in crushing c. Strength in tension d. None
Last Answer : d. None
Description : The design of a beam is based on strength criteria, if the beam is sufficiently strong to resist ----------------. a.Shear force b.deflection c. both a and b. d. none of the above.
Last Answer : a.Shear force
Description : Which property is not required for shaft materials? a. High shear and tensile strength b. Good mach inability c. High fatigue strength d. Good cast ability
Last Answer : d. Good cast ability
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 : The type of stress induced in a closed coiled helical tension spring is a. tensile b. compressive c. torsional shear d. tensile and compressive
Last Answer : c. torsional shear
Description : Wahl’s stress concentration factor is used in close coiled springs under axial load to account for (a) Shear effect (b) Bending effect (c) Compression effect (d) none
Last Answer : (b) Bending effect
Description : When two helical springs of equal lengths are arranged to form a cluster spring, then a. Shear stress in each spring will be equal b. Load taken by each spring will be half the total load c. Only A is correct d. Both A and B is correct
Last Answer : d. Both A and B is correct
Description : Which factor is used to consider the effects of direct shear stress and torsional shear stress when curvature effect stress is not considered? a. Shear stress concentration factor b. Wahl shear stress concentration factor c. Both a. and b. d. None of the above
Last Answer : a. Shear stress concentration factor
Description : The shear stress concentration factor (Ks) in mechanical springs is given as _____ a. (1 + 0.5 / C) b. 0.615 / C c. (1 + 0.615 / C) d. [(4C – 1) / (4C + 1)] + [0.615 / C]
Last Answer : a. (1 + 0.5 / C)
Description : Shear stress in a close coiled helical spring is (a) 16WD/π d3 (b) 32WD/π d3 (c) 8WD/π d3 (d) None
Last Answer : (c) 8WD/π d3
Description : Maximum shear stress in a thick shell is a) (σh+ σl)/2 b) (σh+ σr)/2 c) (σh– σl)/2 d) None
Last Answer : b) (σh+ σr)/2
Description : Considering σh, σl and σr, maximum shear stress will be a) (σh—σl) /2 b) (σl— σh) /2 c) (σh + σr) /2 d) None
Last Answer : c) (σh + σr) /2
Description : A thin spherical shell under internal pressure will fail under a. Maximum shear stress b. Principal compressive stress c. Principal tensile stress d. None
Last Answer : c. Principal tensile stress
Description : When a column is subjected to an eccentric load, the stress induced in the column will be (a) direct stress only (b) bending stress only (c) shear stress only (d) direct and bending stress both
Last Answer : (d) direct and bending stress both
Description : A hollow circular tube with a 2.3-cm I.D. and 2.5-cm O.D. is rigidly supported at its ends. A 2.5 kN-m torque is applied at the center of this tube. What is the maximum shear stress acting on this tube? (a) 2.87Mpa (b) 4.27 Mpa (c) 6.92 Mpa (d) 10.2 Mpa
Last Answer : (a) 2.87Mpa
Description : A hollow shaft has an inner diameter of 3.7 cm and an outer diameter of 4.0 cm. A 1 kN-m torque is applied to this shaft. What is the shear stress at the mid-radius of this shaft? (a) 117Mpa (b) 178 Mpa (c) 286 Mpa (d) 363 Mpa
Last Answer : (c) 286 Mpa
Description : Variation of shear stress in a shaft is (a) Parabolic (b) Linear (c) Cubical (d) None
Last Answer : b) Linear
Description : A circular shaft subjected to torsion undergoes a twist of 10in a length of 120 cm. If the maximum shear stress induced is limited to 1000 kg/cm2and if modulus of rigidity G = 0.8 x 106then the radius of the shaft should be (a) p/8 (b) p/27 (c) 18/p (d) 27/p
Last Answer : (d) 27/p