81. In plastic analysis, the shape factor for a circular section, is_________________?
A. 1.5
B. 1.6
C. 1.7
D. 1.75
✅ The correct answer is option C.
Theory of Structures MCQs
82. 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
✅ The correct answer is option C.
83. A simply supported beam carries a varying load from zero at one end and w at the other end. If the length of the beam is a, the shear force will be zero at a distance x from least loaded point where x is_________________?
A. a/2
B. a/3
C. a
D. a
✅ The correct answer is option C.
84. A spring of mean radius 40 mm contains 8 action coils of steel (N = 80000 N/mm2), 4 mm in diameter. The clearance between the coils being 1 mm when unloaded, the minimum compressive load to remove the clearance, is_____________?
A. 25 N
B. 30 N
C. 35 N
D. 40 N
✅ The correct answer is option C.
85. 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
✅ The correct answer is option C.
86. 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 correct answer is option C.
87. The horizontal thrust on the ends of a two hinged semicircular arch of radius carrying_________________?
A. A uniforml 4/3
B. end, is
C. All the above
D. non of these
✅ The correct answer is option C.
88. A masonry dam (density = 20,000 N/m3) 6 m high, one metre wide at the top and 4 m wide at the base, has vertical water face. The minimum stress at the base of the dam when the reservoir is full, will be_______________________?
A. 75 N/m2
B. 750 N/m 2
C. 7500 N/m 2
D. 75000 N/m2
✅ The correct answer is option C.
89. Co-efficient of wind resistance of a circular surface, is________________?
A. 1/2
B. 1/3
C. 2/3
D. 3/2
✅ The correct answer is option C.
90. The maximum deflection due to a uniformly distributed load w/unit length over entire span of a cantilever of length l and of flexural rigidly EI, is_________________?
A. wl3/3EI
B. wl4/3EI
C. wl4/8EI
D. wl4/12EI
✅ The correct answer is option C.