Maximum shear stress theory for the failure of a material at the elastic limit, is known________________?
(A) Guest’s or Trecas’ theory
(B) St. Venant’s theory
(C) Rankine’s theory
(D) Haig’s theory
A close coil helical spring when subjected to a moment M having its axis along the axis of the helix_________________?
(A) It is subjected to pure bending
(B) Its mean diameter will decrease
(C) Its number of coils will increase
(D) All the above
Maximum strain theory for the failure of a material at the elastic limit, is known as_______________?
(A) Guest’s or Trecas’ theory
(B) St. Venant’s theory
(C) Rankine’s theory
(D) Haig’s theory
A two hinged parabolic arch of span l and rise h carries a load varying from zero at the left end to________________?
(A) /4h thrust is
(B) /8h
(C) /12h
(D) /16h
A composite beam is composed of two equal strips one of brass and other of steel. If the temperature is raised___________________?
(A) Steel experiences tensile force
(B) Brass experiences compressive force
(C) Composite beam gets subjected to a couple
(D) All the above
The moment of inertia of a triangular section (height h, base b) about its base, is_______________?
(A) bh²/12
(B) b²h/12
(C) bh3/12
(D) b3h/12
A close coil helical spring of mean diameter D consists of n coils of diameter d. If it carries an axial load W, the energy stored in the spring, is______________?
(A) 4WD²n/d4N
(B) 4W²Dn/d4N
(C) 4W²D3n/d4N
(D) 4W²D3n²/d4N
The load on a spring per unit deflection, is called______________?
(A) Stiffness
(B) Proof resilience
(C) Proof stress
(D) Proof load
The forces acting normally on the cross section of a bar shown in the given figure introduce_____________?
(A) Compressive stress
(B) Tensile stress
(C) Shear stress
(D) None of these
A body is said to be in equilibrium if___________________?
(A) It moves horizontally
(B) It moves vertically
(C) It rotates about its C.G.
(D) None of these