Theory of Structures Mcqs - Set 8

1)   A compound truss may be formed by connecting two simple rigid frames, by_________________?

a. Two bars
b. Three bars
c. Three parallel bars
d. Three bars intersecting at a point
Answer  Explanation 

ANSWER: Three bars

Explanation:
No explanation is available for this question!


2)   The ratio of crippling loads of a column having both the ends fixed to the column having both the ends hinged, is________________?

a. 1
b. 2
c. 3
d. 4
Answer  Explanation 

ANSWER: 4

Explanation:
No explanation is available for this question!


3)   For determining the force in the member AB of the truss shown in the given figure by method of sections, the section is made to pass through AB, AD and ED and the moments are taken about___________________?

a. Joint C
b. Joint B
c. Joint D
d. Joint A
Answer  Explanation 

ANSWER: Joint D

Explanation:
No explanation is available for this question!


4)   The degree of indeterminacy of the frame in the given figure, is__________________?

a. 1
b. 2
c. 3
d. Zero
Answer  Explanation 

ANSWER: 3

Explanation:
No explanation is available for this question!


5)   A compound bar consists of two bars of equal length. Steel bar cross -section is 3500 mm2and that of brass bar is 3000 mm2. These are subjected to a compressive load 100,000 N. If Eb = 0.2 MN/mm2 and Eb = 0.1 MN/mm2, the stresses developed are___________________?

a. b = 10 N/mm2 s = 20 N/mm 2
b. b = 8 N/mm2 s = 16 N/mm2
c. b = 6 N/mm2 s = 12 N/mm2
d. b = 5 N/mm2 s = 10 N/mm2
Answer  Explanation 

ANSWER: b = 10 N/mm2 s = 20 N/mm 2

Explanation:
No explanation is available for this question!


6)   The ratio of circumferential stress to the longitudinal stress in the walls of a cylindrical shell, due to flowing liquid, is__________________?

a. ½
b. 1
c.
d. 2
Answer  Explanation 

ANSWER: 2

Explanation:
No explanation is available for this question!


7)   The forces acting on the bar as shown in the given figure introduce________________?

a. Compressive stress
b. Tensile stress
c. Shear stress
d. None of these
Answer  Explanation 

ANSWER: Shear stress

Explanation:
No explanation is available for this question!


8)   A simply supported beam carries varying load from zero at one end and w at the other end. If the length of the beam is a, the maximum bending moment will be_______________?

a. wa/27
b. wa²/27
c. w²a
d. wa²
Answer  Explanation 

ANSWER: wa²

Explanation:
No explanation is available for this question!


9)   The yield moment of a cross section is defined as the moment that will just produce the yield stress in_________________?

a. The outer most fibre of the section
b. The inner most fibre of the section
c. The neutral fibre of the section
d. The fibre everywhere
Answer  Explanation 

ANSWER: The outer most fibre of the section

Explanation:
No explanation is available for this question!


10)   A road of uniform cross-section A and length L force P. The Young’s Modulus E of the material, is_________________?

a. E = /A. L
b. E =/P. L
c. E = P. L/
d. E = P. A/
Answer  Explanation 

ANSWER: E = P. L/

Explanation:
No explanation is available for this question!


11)   The forces in the members of simple trusses, may be analysed by________________?

a. Graphical method
b. Method of joints
c. Method of sections
d. All the above
Answer  Explanation 

ANSWER: All the above

Explanation:
No explanation is available for this question!


12)   P = / L² is the equation for 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: Both the ends are hinged

Explanation:
No explanation is available for this question!


13)   If a three hinged parabolic arch, (span l, rise h) is carrying a uniformly distributed load w/unit length over the entire span__________________?

a. Horizontal thrust is wl2/8h
b. S.F. will be zero throughout
c. B.M. will be zero throughout
d. All the above
Answer  Explanation 

ANSWER: All the above

Explanation:
No explanation is available for this question!


14)   The ratio of the stresses produced by a suddenly applied load and by a gradually applied load on a bar, is__________________?

a. 1/4
b. 1/2
c. 1
d. 2
Answer  Explanation 

ANSWER: 2

Explanation:
No explanation is available for this question!


15)   Slenderness ratio of a long column, is_________________?

a. Area of cross-section divided by radius of gyration
b. Area of cross-section divided by least radius of gyration
c. Radius of gyration divided by area of cross-section
d. Length of column divided by least radius of gyration
Answer  Explanation 

ANSWER: Length of column divided by least radius of gyration

Explanation:
No explanation is available for this question!


16)   The horizontal thrust on the ends of a two hinged semicircular arch of radius carrying_________________?

a. A uniforml 4/3
b. end, is
c. All the above
d. non of these
Answer  Explanation 

ANSWER: All the above

Explanation:
No explanation is available for this question!


17)   A shaft subjected to a bending moment M and a torque T, experiences__________________?

a. Maximum bending stress = 32M d3
b. Maximum shear stress = 16 T d3
c. Both A. and B.
d. Neither A. nor B.
Answer  Explanation 

ANSWER: Both A. and B.

Explanation:
No explanation is available for this question!


18)   For calculating the allowable stress of long columns known as_________________?

a. Straight line formula
b. Parabolic formula
c. Perry’s formula
d. Rankine’s formula
Answer  Explanation 

ANSWER: Parabolic formula

Explanation:
No explanation is available for this question!


19)   P=4²EI/L² 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: Both the ends are fixed

Explanation:
No explanation is available for this question!


20)   Pick up the correct statement from the following_______________?

a. The structural member subjected to compression and whose dimensions are small as
b. compared to its length, is called a stmt
c. The vertical compression members are generally known as columns or stanchions
d. Deflection in lateral direction of a long column, is generally known as buckling
e. All the above
Answer  Explanation 

ANSWER: All the above

Explanation:
No explanation is available for this question!


21)   Pick up the incorrect statement from the following: The torsional resistance of a shaft is directly proportional to___________________?

a. Modulus of rigidity
b. Angle of twist
c. Reciprocal of the length of the shaft
d. Moment of inertia of the shaft section
Answer  Explanation 

ANSWER: Moment of inertia of the shaft section

Explanation:
No explanation is available for this question!


22)   inertia of a rectangular section of width and depth about an axis passing The moment of through C.G. and parallel to its width is_______________?

a. BD²/6
b. BD3/6
c. BD3/12
d. B²D/6
Answer  Explanation 

ANSWER: BD3/12

Explanation:
No explanation is available for this question!


23)   For the close coil helical spring of the maximum deflection is__________________?

a. WD3n/d4N
b. 2WD3n/d4N
c. 4W²D3n/d4N
d. 8WD3n/d4N
Answer  Explanation 

ANSWER: 8WD3n/d4N

Explanation:
No explanation is available for this question!