A uniform steel rope 400 metres long is hung vertically. The weight of the steel is 7.8 gm/cm3 and D = 2100 kg/mm2. The ratio of elongation of first 150 metres to that of first 300 metres would be
A.16 ; 1
B.4 ; 1
C.2 ; 1
D.1 ; 2
E.1 ; 4
Category: Strength Of Materials Mcqs
The potential energy stored up in a deformed body is known as
A.Strain energy
B.Potential energy
C.Resilience
D.Deformation energy
E.None of the above
For which of the following diameters a seam-less pipe of 3 mm wall thickness will be considered as a thin walled cylinder?
A.30 mm
B.60 mm
C.80 mm
D.90 mm
E.All of the above
A feinforced concrete beam is considered as made of
A.Homogeneous material
B.Hetrogeneous material
C.Composite material
D.Isotropic material
E.Clad material
A beam supporting a uniformly distributed load over its entire length L is pinned at one end and passes over a roller support at a distance x from the other end. The value of x such that the greatest bending moment in the beam is as small as possible, will be
A.0.111 L
B.0.125 L
C.0.2 L
D.0.293 L
E.0.33 L
The strain energy of the spring when it is subjected to the greatest load which the spring can carry without suffering permanent distortion is known as
A.Limiting stress
B.Proof stress
C.Proof load stress
D.Proof resilience
E.Proof strain energy
The neutral axis of a simply supported beam is
A.Where fibres are subjected to maximum bending stress
B.When fibres are subjected to minimum bending stress
C.Where fibres are subjected to maximum compression
D.Where fibres do not undergo strain
E.Where fibres undergo maximum strain
A material which recovers fully after unloading but not instantaneously is known as
A.Plastic
B.Elastic
C.Partially elastic
D.Anelastic
E.Inelastic
