Theory of Structures Mcqs - Set 2

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
Answer  Explanation 

ANSWER: 4W²D3n/d4N

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: bh3/12

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: All the above

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: /2

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: 5.0 mm

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: wl4/8EI

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: Compressive stress

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: 35 N

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: Proof resilience

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: All the above

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: (L/2d)²

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: Zero

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: Poisson’s ratio

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: 4.5t compression

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: 4/3

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: 0.707

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: m = m + m + 3

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: Proof load

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: W²L/2AE

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: Wa/2h

Explanation:
No explanation is available for this question!