Theory of Structures Mcqs - Set 6

1)   A three hinged arch is generally hinged at its supports and__________________?

a. At one quarter span
b. At the crown
c. Anywhere in the rib
d. None of these
Answer  Explanation 

ANSWER: Anywhere in the rib

Explanation:
No explanation is available for this question!


2)   A truss containing j joints and m members, will be a simple truss if_________________?

a. m = 2j – 3
b. j = 2m – 3
c. m = 3j – 2
d. j = 3m – 2
Answer  Explanation 

ANSWER: m = 2j – 3

Explanation:
No explanation is available for this question!


3)   The locus of reaction of a two hinged semi-circular arch, is_________________?

a. Straight line
b. Parabola
c. Circle
d. Hyperbola
Answer  Explanation 

ANSWER: Straight line

Explanation:
No explanation is available for this question!


4)   section modulus of a square section of side B and that of a circular section of The ratio of the diameter D, is___________________?

a. 2 /15
b. 3 /16
c. 3 /8
d. 5/16
Answer  Explanation 

ANSWER: 3 /16

Explanation:
No explanation is available for this question!


5)   The radius of gyration of a rectangular section (depth D, width B) from a centroidal axis parallel to the width is__________________?

a. D/2
b. D/√3
c. D/2√3
d. D/4√3
Answer  Explanation 

ANSWER: D/2√3

Explanation:
No explanation is available for this question!


6)   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
Answer  Explanation 

ANSWER: el²/3d²

Explanation:
No explanation is available for this question!


7)   The equivalent length of a column of length L having one end fixed and the other end free, is______________?

a. 2L
b. L
c. L/2
d. L
Answer  Explanation 

ANSWER: 2L

Explanation:
No explanation is available for this question!


8)   The equivalent length is of a column of length having both the ends fixed, is_________________?

a. 2 L
b. L
c. L/2
d. L
Answer  Explanation 

ANSWER: L/2

Explanation:
No explanation is available for this question!


9)   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
Answer  Explanation 

ANSWER: 611 N mm

Explanation:
No explanation is available for this question!


10)   The maximum deflection of a simply supported beam of span L, carrying an isolated load at the centre of the span; flexural rigidity being EI, is______________?

a. WL3/3EL
b. WL3/8EL
c. WL3/24EL
d. WL3/48EL
Answer  Explanation 

ANSWER: WL3/48EL

Explanation:
No explanation is available for this question!


11)   In a shaft, the shear stress is not directly proportional to_________________?

a. Radius of the shaft
b. Angle of twist
c. Length of the shaft
d. Modulus of rigidity
Answer  Explanation 

ANSWER: Length of the shaft

Explanation:
No explanation is available for this question!


12)   Beams composed of more than one material, rigidly connected together so as to behave as one piece, are known as________________?

a. Compound beams
b. Indeterminate beams
c. Determinate beams
d. Composite beams
Answer  Explanation 

ANSWER: Composite beams

Explanation:
No explanation is available for this question!


13)   Shear strain energy theory for the failure of a material at elastic limit, is due to_________________?

a. Rankine
b. Guest or Trecas
c. St. Venant
d. Von Mises
Answer  Explanation 

ANSWER: Von Mises

Explanation:
No explanation is available for this question!


14)   The S.F. diagram of a loaded beam shown in the given figure is that of________________?

a. A simply supported beam with isolated central load
b. A simply supported beam with uniformly distributed load
c. A cantilever with an isolated load at the free end
d. A cantilever with a uniformly distributed load
Answer  Explanation 

ANSWER: A cantilever with a uniformly distributed load

Explanation:
No explanation is available for this question!


15)   P = /4L² is the equation of Euler’s crippling load, if__________________?

a. Both the ends are fixed
b. Both the ends are hinged
c. One end is fixed and other end is free
d. One end is fixed and other end is hinged
Answer  Explanation 

ANSWER: One end is fixed and other end is free

Explanation:
No explanation is available for this question!


16)   A steel rod of sectional area 250 sq. mm connects two parallel walls 5 m apart. The nuts at the ends were tightened when the rod was heated to 100°C. If steel = 0.000012/C°, Esteel = 0.2 MN/mm2, the tensile force developed at a temperature of 50°C, is_________________?

a. 80 N/mm2
b. 100 N/mm 2
c. 120 N/mm2
d. 150 N/mm2
Answer  Explanation 

ANSWER: 120 N/mm2

Explanation:
No explanation is available for this question!


17)   H V are the algebraic sums of the forces resolved horizontally and vertically respectively, M is the algebraic sum of the moments of forces about any point, for the equilibrium of the body acted upon____________________?

a. H = 0
b. V = 0
c. M = 0
d. All the above
Answer  Explanation 

ANSWER: All the above

Explanation:
No explanation is available for this question!


18)   cross sections of bronze and copper bars of equal lengt b c are their Ab and Ac are the respective stresses due to load P. If Pb and Pc are the loads shared by them, (where Eb and Ec are their modulii)____________________?

a. b c = Eb /Ec
b. P = Pb + Pc
c. P = Ab b + Ac b
d. All the above
Answer  Explanation 

ANSWER: All the above

Explanation:
No explanation is available for this question!


19)   In the cable shown in the given figure, the minimum tension occurs at___________________?

a. A
b. B
c. C
d. Between A and C
Answer  Explanation 

ANSWER: C

Explanation:
No explanation is available for this question!


20)   The locus of the end point of the resultant of the normal and tangential components of the stress on an inclined plane, is________________?

a. Circle
b. Parabola
c. Ellipse
d. Straight line
Answer  Explanation 

ANSWER: Ellipse

Explanation:
No explanation is available for this question!