A. 25 N
B. 30 N
C. 35 N
D. 40 N
Related Mcqs:
- 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 close coil helical spring of mean diameter D consists of n coils of diameter d. If it carries an axial load W, the energy stored in the spring, is______________?
A. 4WD²n/d4N
B. 4W²Dn/d4N
C. 4W²D3n/d4N
D. 4W²D3n²/d4N - 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 load of 1960 N is raised at the end of a steel wire. The minimum diameter of the wire so that stress in the wire does not exceed 100 N/mm2 is________________?
A. 4.0 mm
B. 4.5 mm
C. 5.0 mm
D. 5.5 mm - 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 steel rod of sectional area 250 sq. mm connects two parallel walls 5 m apart. The nuts at the ends were tightened when the rod was heated to 100°C. If steel = 0.000012/C°, Esteel = 0.2 MN/mm2, the tensile force developed at a temperature of 50°C, is_________________?
A. 80 N/mm2
B. 100 N/mm 2
C. 120 N/mm2
D. 150 N/mm2 - A simply supported rolled steel joist 8 m long carries a uniformly distributed load over it span so that the maximum bending stress is 75 N/mm². If the slope at the ends is 0.005 radian and the value of E = 0.2 × 106 N/mm2, the depth of the joist, is________________?
A. 200 mm
B. 250 mm
C. 300 mm
D. 400 mm - A steel plate d × b is sandwiched rigidly between two timber joists each D × B/2 in section. The steel will be (where Young’s modulus of steel is m times that of the timber)_________________?
A. BD² + mbd²)/6D]
B. BD3 + mbd3)/6D]
C. BD² + mbd3)/4D]
D. BD² + mbd²)/4D] - 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/mm 2, the angle of twist in radians, is_________________?
A. 0.001
B. 0.002
C. 0.0025
D. 0.003 - 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
