Strength of Material Sheet 32

1) Question.

In the Fig. 10.21, $σ_{1}$ and $σ_{2}$ are the maximum and minimum principal stresses. In order that the resultant stress

on the plane $A B$ is

$\sqrt{(<)}$
Answer.
- 1
  $30 °$
- 2
  
  $45 °$
- 3
  
  $60 °$
- 4
  
  $75 °$
Answer: 2

Explanation:
2) Question.

The force in member  of the truss shown in Fig. 10.20. is
Answer.
- 1
  
  $4 T$ compressive
- 2
  
  $36 T$ tensile
- 3
  
  $16 T$ tensile
- 4
  
  $20 T$ tensile
Answer: 3

Explanation:
3) Question.

A T-section is used as a simply supported beam with uniform loading. The maximum bending stresses for a given load will occur at the
Answer.
- 1
  
  top of the section
- 2
  
  C.G. of the section
- 3
  
  mid-point of the depth of section
- 4
  
  bottom of the section
Answer: 4

Explanation:
4) Question.

Fig. 10.16 shows a beam of supported length $' 1 ‵$ and overhang $0.1 1$ , carrying a concentrated load $W$ at the end

of the overhang. Which one of the following figures would represent the correct shear force diagram for the beam?
Answer.
- 1
- 2
- 3
- 4
Answer: 4

Explanation:
5) Question.

A Mohr's circle reduces to a point when the body is subjected to
Answer.
- 1
  
  pure shear
- 2
  
  Uniaxial stress only
- 3
  
  equal and opposite axial stresses on two mutually perpendicular planes, the planes being free of shear
- 4
  
  equal axial stresses on two mutually perpendicular planes, the planes being free of shear
Answer: 2

Explanation:
6) Question.

The bending moment diagram for an overhanging beam is shown in Fig. 10.15.

The point of contraflexure would include
Answer.
- 1
  
  $A$ and $F$
- 2
  
  $B a n d E$
- 3
  
  $C a n d D$
- 4
  
  $A a n d D$
Answer: 3

Explanation:
7) Question.

Match List with l with List ll and select the correct answer using the codes given below the lists

List l List ll

(Type of beam with ( S.F. diagram)

&nb
Answer.
- 1
  
  $A B C D 4 1 3 2$
- 2
  
  $A B C D 4 3 2 1$
- 3
  
  $A B C D 3 4 1 2$
- 4
  
  $A B C D 3 4 2 1$
Answer: 2

Explanation:
8) Question.

The system which is shown in Fig. 10.10 consists of two prismatic bars of same length $L$ and same axial rigidity $A E$ .

The system lies in the vertical plane and carries a vertical load $P$ at

joint $X$ , The vertical deflection of joint X is
Answer.
- 1
  
  $\frac{P L}{A E}$
- 2
  
  $\frac{P L}{2 A E}$
- 3
  
  $\frac{2 P L}{A E}$
- 4
  
  zero
Answer: 3

Explanation:
9) Question.

A reinforced cement concrete footing as shown in Fig. 10.9 carries a concentrated load at P so as to produce maximum

bending stresses due to eccentricities about x-x axis and y-y axis as 100

kN/m² and 150 kN/m² respectively. If the direct stress due to loading is 175 kN/m² (compressive), then the intensity

of resultant stress at corner B will be
Answer.
- 1
  
  425 kN/m² compressive
- 2
  
  125 kN/m² compressive
- 3
  
  75 kN/m² tensile
- 4
  
  225 kN/m² compressive
Answer: 2

Explanation:
10) Question.

A masonry pier ABCD as shown in Fig. 10.8 supports a vertical load W at a point P. The nature of bending stresses at A due to eccentricity of load about x-x axis and y-y respectively are
Answer.
- 1
  
  compressive and compressive
- 2
  
  tensile and tensile
- 3
  
  compressive and tensile
- 4
  
  tensile and compressive
Answer: 3

Explanation:
11) Question.

The rigid-jointed plane frame shown in Fig. 10.7 will
Answer.
- 1
  
  sway to right
- 2
  
  sway to left
- 3
  
  not sway at all
- 4
  
  none of the above
Answer: 1

Explanation:
12) Question.

The weakest section in a diamond riveting as shown in Fig. 10.1 is
Answer.
- 1
  
  section 1 – 1
- 2
  
  section 2 – 2
- 3
  
  section 3 – 3
- 4
  
  section 4 – 4
Answer: 1

Explanation:

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