A. 4WD²n/d4N
B. 4W²Dn/d4N
C. 4W²D3n/d4N
D. 4W²D3n²/d4N
Related Mcqs:
- 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 - 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 - The stiffness of the close coil helical spring is_________________?
A. d4N/8D3n
B. d4N/4D3n
C. 4D3N/d4n
D. 8D3N/d4n - For the close coil helical spring of the maximum deflection is__________________?
A. WD3n/d4N
B. 2WD3n/d4N
C. 4W²D3n/d4N
D. 8WD3n/d4N - A steel bar 20 mm in diameter simply-supported at its ends over a total span of 40 cm carries a load at its centre. If the maximum stress induced in the bar is limited to N/mm2, the bending strain energy stored in the bar, is___________________?
A. 411 N mm
B. 511 N mm=
C. 611 N mm
D. 711 N mm - 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 - 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 - If the strain energy stored per unit volume in a hollow shaft subjected to a pure torque when t attains maximum shear stress fs the ratio of inner diameter to outer diameter, is 17/64 (f /N)s__________________?
A. 1/2
B. 1/3
C. 1/4
D. 1/5 - a uniform circular bar of diameter d and length , which extends by an The deflection of amount under a tensile pull , when it carries the same load at its mid-span, is___________________?
A. el/2d
B. e²l/3d²
C. el²/3d²
D. e²l²/3d² - 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
