   ## Theory of Structures MCQ Practice Questions (Civil Eng) Set 5

##### Pick up the correct statement from the following:

Options are :

• A wire wound in spiral form, is called a helical spring
• The angle made by the coil with horizontal, is called the angle of helix
• All the above
• The pitch of a close coil spring, is very small
• In the open coil helical spring, the angle of helix is comparatively large

##### If normal stresses due to longitudinal and transverse loads on a bar are ?1 and ?2 respectively, the normal component of the stress on an inclined plane ?� to the longitudinal load, is:A.?1 sin ? x ?2 cos ?B.?1 sin ?^(2) + ?2 cos^(2) ?C. Larger image D. Larger image Options are :

• C
• B
• A
• D

Options are :

• Magnitude
• Direction
• Point of application
• All the above

Options are :

• D
• A
• B
• E
• C

##### Maximum shear stress theory for the failure of a material at the elastic limit, is known:

Options are :

• Von Mises's theory
• St. Venant's theory
• Haig's theory
• Guest's or Trecas' theory
• Rankine's theory

Options are :

• B
• D
• A
• C

##### Maximum principal stress theory for the failure of a material at elastic point, is known:

Options are :

• Rankine's theory
• Haig's theory
• Von Mises's theory
• Guest's or Trecas' theory
• St. Venant's theory

Options are :

• A
• C
• D
• B

Options are :

• C
• A
• B
• D

Options are :

• cos ?
• sin ?
• tan ?
• sec ?
• cos ?

##### In the cable shown in the given figure, the minimum tension occurs at: Larger image Options are :

• B
• Between B and C
• Between A and C
• A
• C

Options are :

• B
• C
• A
• D

Options are :

• 45�
• 60�
• 30�
• 90�

##### Pick up the correct statement from the following:

Options are :

• All the above
• In a loaded beam, the moment at which the entire section of the beam becomes fully plastic, is called plastic moment
• In a loaded beam, the moment at which the first yield occurs is called yield moment
• The ratio of plastic moment to the yield moment, is called shape factor
• In a fully plastic stage of the beam, the neutral axis divides the section in two sections of equal area

Options are :

• 1.5
• 1.6
• 1.7
• 1.4

Options are :

• A
• B
• C
• D
• E

Options are :

• 1.40 to 1.50
• 1.30 to 1.40
• 1.10 to 1.20
• 1.20 to 1.30

##### If ?H and ?V are the algebraic sums of the forces resolved horizontally and vertically respectively, and ?M is the algebraic sum of the moments of forces about any point, for the equilibrium of the body acted upon:

Options are :

• ?H = 0
• ?V = 0
• All the above
• ?M = 0

Options are :

• 1.34
• 2.34
• 1.5
• 2.5

##### Stress may be expressed in Newtons:

Options are :

• All of the above
• per centimetre square (N/cm^(2))
• per metre square (N/m^(2))
• per millimetre square (N/mm^(2))

Options are :

• E
• B
• A
• D
• C

Options are :

• A
• B
• D
• C

##### The force in AD of the truss shown in given figure, is: Larger image Options are :

• Zero
• 0.5t compression
• 3.0t compression
• 0.5t tension
• 4.0t compression

Options are :

• D
• B
• C
• A

##### For calculating the allowable stress of long columns. The empirical formula Larger image , is known as:

Options are :

• Straight line formula
• Rankine's formula
• Parabolic formula
• Perry's formula

Options are :

• sin^(2)?
• sin ?
• sin ? cos ?
• cos ?
• tan ?

Options are :

• C
• A
• D
• B

##### Principal planes are subjected to:

Options are :

• None of these
• Tangential stresses only
• Normal stresses as well as tangential stresses
• Normal stresses only

Options are :

• B
• D
• C
• A

Options are :

• 1.5
• 1.6
• 1.7
• 1.75