Theory of Structures MCQs
Theory of Structures MCQs
Try to answer these 20+ Theory of Structures MCQs and check your understanding of the Theory of Structures subject.
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1: A rolled steel joist is simply supported at its ends and carries a uniformly distributed load which causes a maximum deflection of 10 mm and slope at the ends of 0.002 radian. The length of the joist will be,
A. 16 m
B. 10 m
C. 14 m
D. 18 m
2: The point of contraflexure is the point where
A. B.M. is maximum
B. B.M. is minimum
C. S.F. is zero.
D. B.M. changes sign
3: Pick up the correct statement from the following:
A. The ratio of plastic moment to the yield moment, is called shape factor
B. In a fully plastic stage of the beam, the neutral axis divides the section in two sections of equal area
C. In a loaded beam, the moment at which the entire section of the beam becomes fully plastic, is called plastic moment
D. All these
E. E: In a loaded beam, the moment at which the first yield occurs is called yield moment
4: 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. 35 N
B. 40 N
C. 25 N
D. 30 N
5: Pick the correct statement from the following:
A. Bending loads should pass through the shear centre to avoid twisting
B. For channels, the shear centre does not concide its centroid
C. All these
D. For I sections, the shear centre coincides with the centroid of the cross section of the beam
E. The point of intersection of the bending axis with the cross section of the beam, is called shear centre
6: 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 x 106 kg/cm2, the side of the rod, is
A. 1.5 cm
B. 2.5 cm
C. 2 cm
D. 1 cm
7: Pick up the incorrect statement from the following : The torsional resistance of a shaft is directly proportional to
A. Reciprocal of the length of the shaft
B. Modulus of rigidity
C. Angle of twist
D. Moment of inertia of the shaft section.
8: If a solid shaft (diameter 20 cm, length 400 cm, N = 0.8 x 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. 0.003
C. 0.0025
D. 0.002
9: In plastic analysis, the shape factor for a circular section, is
A. 1.7
B. 1.5
C. 1.6
D. 1.75
10: 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. 5.5 mm
B. 5.0 mm
C. 4.5 mm
D. 4.0 mm
E. 6.0 mm
11: Shear strain energy theory for the failure of a material at elastic limit, is due to
A. Haig
B. Rankine
C. Von Mises.
D. Guest or Trecas
E. St. Venant
12: He general expression for the B.M. of a beam of length l is the beam carries M= wl/2 x- wx2/2
A. An isolated load at mid span
B. None of these.
C. A load varying linearly from zero at one end to w at the other end
D. A uniformly distributed load w/unit length
13: Stress may be expressed in Newtons
A. None of these.
B. Per metre square (N/m2)
C. Per millimetre square (N/mm2)
D. Per centimetre square (N/cm2)
14: If Q is load factor, S is shape factor and F is factor of safety in elastic design, the following:
A. Q = S - F
B. Q = F - S
C. Q = S + F
D. Q = S x F
15: If ΣH and ΣV are the algebraic sums of the forces resolved horizontally and vertically respectively, and ΣM is the algebraic sum of the moments of forces about any point, for the equilibrium of the body acted upon
A. ΣM = 0
B. All these
C. ΣV = 0
D. ΣH = 0
16: Beams composed of more than one material, rigidly connected together so as to behave as one piece, are known as
A. Compound beams
B. Indeterminate beams
C. Composite beams.
D. Determinate beams
17: In plastic analysis, the shape factor for a triangular section, is
A. 1.34
B. 2.5
C. 2.34
D. 1.5
18: For determining the support reactions at A and B of a three hinged arch, points B and C are joined and produced to intersect the load line at D and a line parallel to the load line through A at D'. Distances AD, DD' and AD' when measured were 4 cm, 3 cm and 5 cm respectively. The angle between the reactions at A and B is
A. 45°
B. 30°
C. 90°
D. 60°
19: The tangential component of stress on an plane inclined θ° to the direction of the force, may be obtained by multiplying the normal stress by
A. Sin θ
B. Sin2θ
C. Cos θ
D. Sin θ cos θ
E. Tan θ
20: A material is said to be perfectly elastic if
A. It regains its original shape partially on removal of the load
B. It regains its original shape on removal of the load
C. It does not regain its original shape at all
D. None of these.
21: What is the meaning of the term 'Action' as used in the Eurocodes?
A. Motion
B. Structural Strength
C. Force
D. Energy
22: What is a Beam?
A. A horizontal member that carries horizontal loads along its length
B. A vertical member that carries vertical loads along its length
C. A vertical member that carries horizontal loads along its length
D. A horizontal member that carries vertical loads along its length
23: What are the units of bending moment?
A. Metres
B. Newton-metres
C. Kilograms
D. KiloNewton-metres
24: What does CAD stand for?
A. Computer Aided Design
B. Computer Aided Drafting
C. Computer Animation Design
D. Computer Aided Drawing
25: What is a Cantilever?
A. Concrete formwork
B. Floating staircase
C. Overhanging beam, roof or floor
D. Suspended platform
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Theory of Structures MCQs
