Gradually applied static loads do not change with time their_______________?
(A) Magnitude
(B) Direction
(C) Point of application
(D) All the above
If E, N, K and 1/m are modulus of elasticity, modulus of rigidity. Bulk modulus and Poisson ratio of the material, the following relationship holds good_______________?
(A) E = 3K (1 – 2/m)
(B) E = 2N (1 + 1/m)
(C) (3/2)K (1 – 2/m) = N (1 + 1/m)
(D) All the above
If Ix and Iy are the moments of inertia of a section about X and Y axes, the polar moment of inertia of the section, is_________________?
(A) (IX + IY)/2
(B) (IX – IY)/2
(C) IX + IY
(D) (I /I )
In case of a simply supported I-section beam of span L and loaded with a central load W, the length of elasto-plastic zone of the plastic hinge, is_________________?
(A) L/2
(B) L/3
(C) L/4
(D) L/5
A simply supported beam A carries a point load at its mid span. Another identical beam B carries the same load but uniformly distributed over the entire span. The ratio of the maximum deflections of the beams A and B, will be________________?
(A) 2/3
(B) 3/2
(C) 5/8
(D) 8/5
In the truss shown in given figure the force in member DC is________________?
(A) 100 t compressive
(B) 100 t tensile
(C) Zero
(D) Indeterminate
A simply supported uniform rectangular bar breadth b, depth d and length L carries an isolated load W at its mid-span. The same bar experiences an extension e under same tensile load. The ratio of the maximum deflection to the elongation, is________________?
(A) L/d
(B) L/2d
(C) (L/2d)²
(D) (L/3d)²
The strain energy due to volumetric strain________________?
(A) Is directly proportional to the volume
(B) Is directly proportional to the square of exerted pressure
(C) Is inversely proportional to Bulk modulus
(D) All the above
The strain energy stored in a spring when subjected to greatest load without being permanently distorted, is called______________?
(A) Stiffness
(B) Proof resilience
(C) Proof stress
(D) Proof load
A spring of mean radius 40 mm contains 8 action coils of steel (N = 80000 N/mm2), 4 mm in diameter. The clearance between the coils being 1 mm when unloaded, the minimum compressive load to remove the clearance, is_____________?
(A) 25 N
(B) 30 N
(C) 35 N
(D) 40 N