Strength of Materials

151. In a three hinged arch, the shear force is usually

  1. Maximum at crown
  2. Maximum at springing
  3. Maximum at quarter points
  4. Varies with slope

Correct answer: (B)
Maximum at springing

152. In a three hinged arch, the third hinge is generally kept at

  1. Crown of the arch
  2. Midpoint of the crown and left support hinge
  3. Midpoint of the crown and right support hinge
  4. None of these

Correct answer: (A)
Crown of the arch

153. In actual machines

  1. Mechanical advantage is greater than velocity ratio
  2. Mechanical advantage is equal to velocity ratio
  3. Mechanical advantage is less than velocity ratio
  4. Mechanical advantage is unity

Correct answer: (C)
Mechanical advantage is less than velocity ratio

154. In case of an eccentric loading on a bracket subjected to moment M, the tangential force developed in any rivet, at right angles to its radius vector r is

  1. Mr/∑r2
  2. ∑r2/Mr
  3. Mr2/∑r2
  4. ∑Mr/∑r2

Correct answer: (A)
Mr/∑r2

155. In determining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than

  1. Two members with unknown forces of the frame
  2. Three members with unknown forces of the frame
  3. Four members with unknown forces of the frame
  4. Three members with known forces of the frame

Correct answer: (B)
Three members with unknown forces of the frame

156. In ideal machines

  1. Mechanical advantage is greater than velocity ratio
  2. Mechanical advantage is equal to velocity ratio
  3. Mechanical advantage is less than velocity ratio
  4. Mechanical advantage is unity

Correct answer: (B)
Mechanical advantage is equal to velocity ratio

157. In rectangular columns (cross-section b × h), the core is a

  1. Rectangle of lengths b/2 and h/2
  2. Square of length b/2
  3. Rhombus of length h/2
  4. Rhombus of diagonals b/3 and h/3

Correct answer: (D)
Rhombus of diagonals b/3 and h/3

158. In the equation of virtual work, following force is neglected

  1. Reaction of any smooth surface with which the body is in contact
  2. Reaction of a rough surface of a body which rolls on it without slipping
  3. Reaction at a point or an axis, fixed in space, around which a body is constrained to turn
  4. All of the above

Correct answer: (D)
All of the above

159. In the lever of third order, load W, effort P and fulcrum F are oriented as follows

  1. W between P and F
  2. F between W and P
  3. P between W and F
  4. W, P and F all on one side

Correct answer: (A)
W between P and F

160. Influence lines are drawn for structures

  1. Of any type
  2. Statically determinate
  3. Pin-jointed truss
  4. None of these

Correct answer: (A)
Of any type

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