Q.1 The ratio of strengths of solid to hollow shafts, both having outside diameter D and hollow having inside diameter D/2, in torsion, is
A. 1/4
B. 1/2
C. 1/16
D. 15/16
E. 3/8
Answer: Option D
Q.2 The weakest section of a diamond riveting, is the section which passes through
A.first row
B.second row
C.central raw
D.one rivet hole of end row.
Answer: Option A
Q.3 In a loaded beam, the point of con-traflexture occurs at a section where
A. bending moment is minimum
B. bending moment is zero or changes sign
C. bending moment is maximum
D. shearing force is maximum
E. shearing force is minimum.
Answer: Option B
Q.4 A three-hinged arch is said to be :
A. statically determinate structure
B. statically indeterminate structure
C.a bent beam
D. none of these.
Answer: Option A
Q.5 The shape of the bending moment diagram over the length of a beam, having no external load, is always
A. linear
B. parabolic
C. cubical
D. circular.
Answer: Option A
Q.6 A beam of length L is pinned at both ends and is subjected to a concentrated bending couple of moment M at its centre. The maximum bending moment in the beam is
A. M
B. M/2
C. M/3
D. ML/2
Answer: Option A
Q.7 If two forces acting at a joint are not along the straight line, then for the equilibrium of the joint
A. one of the forces must be zero
B. each force must be zero
C. forces must be equal and of the same sign
D. forces must be equal in magnitude but opposite in sign.
Answer: Option B
Q.8 If the shear force along a section of a beam is zero, the bending moment at the section is
A. zero
B. maximum
C. minimum
D. average of maximum-minimum
E. none of these.
Answer: Option B