A. WL/2AE
B. WL/AE
C. W²L/AE
D. W²L/2AE
Related Mcqs:
- A steel bar 20 mm in diameter simply-supported at its ends over a total span of 40 cm carries a load at its centre. If the maximum stress induced in the bar is limited to N/mm2, the bending strain energy stored in the bar, is___________________?
A. 411 N mm
B. 511 N mm=
C. 611 N mm
D. 711 N mm - A compound bar consists of two bars of equal length. Steel bar cross -section is 3500 mm2and that of brass bar is 3000 mm2. These are subjected to a compressive load 100,000 N. If Eb = 0.2 MN/mm2 and Eb = 0.1 MN/mm2, the stresses developed are___________________?
A. b = 10 N/mm2 s = 20 N/mm 2
B. b = 8 N/mm2 s = 16 N/mm2
C. b = 6 N/mm2 s = 12 N/mm2
D. b = 5 N/mm2 s = 10 N/mm2 - A steel rod 1 metre long having square cross section is pulled under a tensile load of 8 tonnes. The extension in the rod was 1 mm only. If Esteel = 2 × 106 kg/cm2, the side of the rod, is_________________?
A. 1 cm
B. 1.5 cm
C. 2 cm
D. 2.5 cm - The ratio of the stresses produced by a suddenly applied load and by a gradually applied load on a bar, is__________________?
A. 1/4
B. 1/2
C. 1
D. 2 - A simply supported uniform rectangular bar breadth b, depth d and length L carries an isolated load W at its mid-span. The same bar experiences an extension e under same tensile load. The ratio of the maximum deflection to the elongation, is________________?
A. L/d
B. L/2d
C. (L/2d)²
D. (L/3d)² - The strain energy stored in a spring when subjected to greatest load without being permanently distorted, is called______________?
A. Stiffness
B. Proof resilience
C. Proof stress
D. Proof load - 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 (f /N)s__________________?
A. 1/2
B. 1/3
C. 1/4
D. 1/5 - a uniform circular bar of diameter d and length , which extends by an The deflection of amount under a tensile pull , when it carries the same load at its mid-span, is___________________?
A. el/2d
B. e²l/3d²
C. el²/3d²
D. e²l²/3d² - If a concrete column 200 × 200 mm in cross-section is reinforced with four steel bars of 1200 mm2 total cross-sectional area. Calculate the safe load for the column if permissible stress in concrete is 5 N/mm2 and Es is 15 Ec________________?
A. 264 MN
B. 274 MN
C. 284 MN
D. 294 MN - A steel bar 5 m × 50 mm is loaded with 250,000 N. If the modulus of elasticity of the material is 0.2 MN/mm2 and Poisson’s ratio is 0.25, the change in the volume of the bar is_________________?
A. 1.125 cm3
B. 2.125 cm3
C. 3.125 cm3
D. 4.125 cm2
