1) 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
|
||||
2) 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
|
||||
3) The assumption in the theory of bending of beams is_________________? a. Material is homogeneous b. Material is isotropic c. Young’s modulus is same in tension as well as in compression d. All the above
|
||||
4) A concentrated load P is supported by the free end of a quadrantal ring AB whose end B is fixed. The ratio of the vertical to horizontal deflections of the end A, is______________? a. /6 b. /2 c. /3 d. /4
|
||||
5) A load of 1960 N is raised at the end of a steel wire. The minimum diameter of the wire so that stress in the wire does not exceed 100 N/mm2 is________________? a. 4.0 mm b. 4.5 mm c. 5.0 mm d. 5.5 mm
|
||||
6) The maximum deflection due to a uniformly distributed load w/unit length over entire span of a cantilever of length l and of flexural rigidly EI, is_________________? a. wl3/3EI b. wl4/3EI c. wl4/8EI d. wl4/12EI
|
||||
7) 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
|
||||
8) 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
|
||||
9) 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
|
||||
10) 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
|
||||
11) 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
|
||||
12) 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
|
||||
13) The ratio of lateral strain to axial strain of a homogeneous material, is known___________________? a. Yield ratio b. Hooke’s ratio c. Poisson’s ratio d. Plastic ratio
|
||||
14) The force in BF of the truss shown in given figure, is_______________? a. 4t tension b. 4t compression c. 4.5t tension d. 4.5t compression
|
||||
15) The ratio of maximum shear stress to average shear stress of a circular beam, is________________? a. 2/3 b. 3/2 c. 3/4 d. 4/3
|
||||
16) For a strongest rectangular beam cut from a circular log, the ratio of the width and depth, is________________? a. 0.303 b. 0.404 c. 0.505 d. 0.707
|
||||
17) m1 and m2 are the members of two individual simple trusses of a compound truss. The compound truss will be rigid and determinate if__________________? a. m = m1 + m2 b. m = m1 + m2 + 1 c. m = m1 + m2 + 2 d. m = m + m + 3
|
||||
18) The greatest load which a spring can carry without getting permanently distorted, is called_________________? a. Stiffness b. Proof resilience c. Proof stress d. Proof load
|
||||
19) A bar L metre long and having its area of cross-section A, is subjected to a gradually applied tensile load W. The strain energy stored in the bar is_________________? a. WL/2AE b. WL/AE c. W²L/AE d. W²L/2AE
|
||||
20) An isolated load W is acting at a distance a from the left hand support, of a three hinged arch of span 2l and rise h hinged at the crown, the horizontal reaction at the support, is_________________? a. Wa/h b. Wa/2h c. 2W/ha d. 2h/Wa
|