The pull required to crush the rivet per pitch length is
A. pt σ t
B. dt σ c
C. 4 π d 2 σ t
D. 4 π d 2 σ c
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The pull required to shear off a rivet, in double shear, per pitch length is
A. 4 π d 2 σ t
B. 4 π d 2 τ
C. 2 π d 2 σ t
D. 2 π d 2 τ
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The strength of the unriveted or solid plate per pitch length is
A. dt σ c
B. pt σ t
C. ( p − d ) t σ t
D. 2 π d 2 τ
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The shear force in the center of a simply supported beam carrying a uniformly distributed load of ‘w’ per unit length, is
A. Zero
B. 2 w l 2
C. 4 w l 2
D. 8 w l 2
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The bending moment on a section is maximum where shear force is
A. Minimum
B. Maximum
C. Changing sign
D. Zero
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When a thin cylindrical shell is subjected to an internal pressure, there will be
A. A decrease in diameter and length of the shell
B. An increase in diameter and decrease in length of the shell
C. A decrease in diameter and increase in length of the shell
D. An increase in diameter and length of the shell
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A reinforced cement concrete beam is considered to be made of
A. Homogeneous material
B. Heterogeneous material
C. Composite material
D. Isotropic material
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The given figure shows the Mohr's circle of stress for two unequal and like principal stresses (σ
x and σ
y ) acting at a body across two mutually perpendicular planes. The resultant stress is given by
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The tensile strength of ductile materials is _________ its compressive strength.
A. Equal to
B. Less than
C. Greater than
D. None of these
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The ultimate tensile stress of mild steel compared to ultimate compressive stress is
A. Same
B. More
C. Less
D. Unpredictable
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The assumption made in the theory of the reinforced cement concrete beam is that
A. All the tensile stresses are taken up by the steel reinforcement only
B. There is a sufficient bond between steel and concrete
C. The steel and concrete are stressed within its elastic limit
D. All of the above
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The change in length due to a tensile or compressive force acting on a body is given by (where P = Tensile or compressive force acting on the body, l = Original length of the body, A = Cross-sectional area of the body and E = Young's modulus for the material of the body)
A. E P l A
B. AE P l
C. P l A E
D. P l AE
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Young’s modulus of a wire is defined as the stress which will increase the length of wire compared to its original length by
A. Half
B. Same amount
C. Double
D. One-fourth
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In order to avoid tearing off the plate at an edge, the distance from the center of the rivet hole to the nearest edge of the plate (i.e. margin) should be (where d = Diameter of rivet hole in mm)
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It equal and opposite forces applied to a body tend to elongate it, the stress so produced is called
A. Internal resistance
B. Tensile stress
C. Transverse stress
D. Compressive stress
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Rupture stress is
A. Breaking stress
B. Maximum load/original cross-sectional area
C. Load at breaking point/Area
D. Load at breaking point/neck area
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The relation between Young's modulus (E) and bulk modulus (K) is given by
A. K = mE 3 m − 2
B. K = 3 m − 2 mE
C. K = mE 3 ( m − 2 )
D. K = 3 ( m − 2 ) mE
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The relation between Young's modulus (E), shear modulus (C) and bulk modulus (K) is given by
A. E = 3 K + C 3 KC
B. E = 3 K + C 6 KC
C. E = 3 K + C 9 KC
D. E = 3 K + C 12 KC
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Lame's theory is associated with
A. Thin cylindrical shells
B. Thick cylindrical shells
C. Direct and bending stresses
D. None of these
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Fatigue test is carried out for
A. Stresses varying between two limits of equal value, but of opposite sign
B. Stresses varying between two limits of unequal value, but of opposite sign
C. Stresses varying between two limits of unequal value but of same sign
D. All of the above
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