A mild steel bolt of net cross-sectional area 8.4 sq. cm, diameter 37 will be safe to take a tensile load of about
A.30 tonnes
B.40 tonnes
C.50 tonnes
D.60 tonnes
E.75 tonnes
Category: Strength Of Materials Mcqs
The compression members tend to buckle in the direction of their
A.Axis of load
B.Perpendicular to the axis of load
C.Minimum cross-section
D.Least radius of gyration
E.None of the above
Three pieces of wood having 3.75 cm x 3.75 cm square cross-sections are glued together and to the foundation. If the horizontal force P = 600 kg is applie3d to the central piece, the average shearing stress in each of the glued joints would be
A.20 kg/cm2
B.40 kg/cm2
C.80 kg/cm2
D.430 kg/cm2
E.860 kg/cm2
A rectangular beam 200 mm deep by 100 mm wide-subjected to maximum bending moment of 500 kNm. The maximum stress in the beam will be
A.250 N/mm2
B.500 N/mm2
C.750 N/mm2
D.1500 N/mm2
A material which undergoes no deformation till its yield point is reached and then it flows at a constant stress is known as
A.Elastic
B.Plastic
C.Rigid
D.Elastic-plastic
E.Rigid plastic
A spring steel ribbon 3.2 mm wide, 0.5 mm thick is wound on a 500 mm diameter cylinder. If E = 2 x 105 N/mm2, the maximum stress in the steel will be
A.100 N/mm2
B.200 N/mm2
C.400 N/mm2
D.800 N/mm2
With a punch for which the maximum crushing stress is 4 times the maximum shearing stress of the plate, the biggest hole that can be punched in the plate would be of diameter equal to
A.1/4 x thickness of plate
B.1/2 x thickness of plate
C.Plate thickness
D.2 x plate thickness
E.4 x plate thickness
When the deformation arising from change of temperature is presented, the stresses set up are known as
A.Compressive stresses
B.Tensile stresses
C.Shear stresses
D.Thermal stresses
E.None of the above
The stress in the cylinder will be
A.6 N/mm2
B.12 N/mm2
C.18 N/mm2
D.20 N/mm2
E.24 N/mm2
The deformation of any structure takes place in such a manner that the work of deformation is a minimum. This is known as
A.Principle of least work
B.Law of minimum energy
C.Law of conservation of energy
D.Principle of failure of structure
E.None of the above
