For punching a hole of 25 mm diameter in a plate 20 mm thick, if the shear stress of plate material is 30 kg/mm2, the force required would be
A.10,000 kg
B.18,850 kg
C.28,850 kg
D.47,123 kg
E.None of the above
Category: Strength Of Materials Mcqs
The limit within which Hooke’s law holds good is known as
A.Elastic limit
B.Plastic limit
C.Yield point
D.Eulers limit
E.None of the above
Rivets are made of
A.Brittle material
B.Ductile material
C.Soft material
D.Hard material
E.None of the above
In case of a hinged support, the reaction
A.Acts perpendicular to the surface of hinge
B.Acts perpendicular to the beam
C.Acts along the axis of beam
D.Acts in a direction opposite to the resultant shear force at the support
E.In a direction which depends on the loads
In case of eccentrically loaded struts
A.Hollow section is preferred
B.Solid section is preferred
C.Composite section is preferred
D.Reinforced section is preferred
E.Any of the above sections mauy be used
A beam supported at more than two places is known as
A.Flitched beam
B.Uniform beam
C.Continuous beam
D.Economical beam
E.None of the above
The bending moment diagram in case of a cantilever beam carrying a linearly varying load from zero at free end to maximum at supported end will be a
A.Rectangle
B.Traingle
C.Parabola
D.Cubic parabola
E.Inverse hyperbola
A strip of steel 75 mm wide 40 mm thick is bent round a circular drum of 4.96 m outside diameter. If E = 2 x 105 N/mm2, the maximum stress due to bending will be
A.1600 N/mm2
B.1200 N/mm2
C.800 N/mm2
D.400 N/mm2
The allowable stresses for the design of steel chimney depend upon the ratio of
A.area of cylindrical portion of the area flared portion
B.volume of cylindrical portion to the volume of flared portion
C.weight of cylindrical portion to the weight of the flared portion
D.effective height to the radius of gyration
A boiler shell 100 cm diameter and plate thickness 12 mm is subjected to an internal pressure of 1.2 N/m2. The hoop stress will be
A.45 N/m2
B.50 N/m2
C.135 N/m2
D.155.5 N/m2
E.180 N/m2
