# Practice Test: Question Set - 11

**1. If the rivets in adjacent rows are staggered and the outermost row has only one rivets, the arrangement of the rivets is called**

- (A) Chain riveting

- (B) Zigzag riveting

- (C) Diamond riveting

- (D) Crisscross riveting

**2. The point of contraflexure is a point where**

- (A) Shear
force changes sign

- (B) Bending
moment changes sign

- (C) Shear
force is maximum

- (D) Bending
moment is maximum

**3. The value of shear stress which is induced in the shaft due to the applied couple varies**

- (A) From maximum at the center to zero at the circumference

- (B) From zero at the center to maximum at the circumference

- (C) From maximum at the center to minimum at the circumference

- (D) From minimum at the center to maximum at the circumference

**4. The extremities of any diameter on Mohr's circle represent**

- (A) Principal
stresses

- (B) Normal
stresses on planes at 45°

- (C) Shear
stresses on planes at 45°

- (D) Normal and
shear stresses on a plane

**5. The materials having same elastic properties in all directions are called**

- (A) Ideal materials

- (B) Uniform materials

- (C) Isotropic materials

- (D) Piratical materials

**6. The ratio of the largest load in a test to the original cross-sectional area of the test piece is called**

- (A) Elastic
limit

- (B) Yield stress

- (C) Ultimate
stress

- (D) Breaking
stress

**7. A column is said to be a short column, when**

- (A) Its
length is very small

- (B) Its
cross-sectional area is small

- (C) The ratio of
its length to the least radius of gyration is less than 80

- (D) The ratio of
its length to the least radius of gyration is more than 80

**8. The total elongation produced in a bar of uniform section hanging vertically downwards due to its own weight is equal to that produced by a weight**

- (A) Of same magnitude as that of bar and
applied at the lower end

- (B) Half the weight of bar applied at lower end

- (C) Half of the square of weight of bar applied
at lower end

- (D) One fourth of weight of bar applied at
lower end

**9. The lower layer of the beam as shown in the below figure, will be**

- (A) In tension

- (B) In
compression

- (C) Neither
in tension nor in compression

- (D) None
of these

**10. The tensile strength of the welded joint for double fillet is (where**

*s*= Leg or size of the weld,*l*= Length of weld, and Ïƒ_{t}*= Allowable tensile stress for weld metal)*- (A) 0.5

*s*.

*l*.Ïƒ

_{t}

- (B)

*s*.

*l*.Ïƒ

*t*

- (C) √2

*s*.

*l*.Ïƒ

_{t}

- (D) 2.

*s*.

*l*.Ïƒ

*t*

**11. If a material expands freely due to heating it will develop**

- (A) Thermal stresses

- (B) Tensile stress

- (C) Bending

- (D) No stress

**12. When a body is subjected to biaxial stress i.e. direct stresses (**

*Ïƒ*) and (_{x}*Ïƒ*) in two mutually perpendicular planes accompanied by a simple shear stress (_{y}*Ï„*), then maximum normal stress is_{xy}- (A)

*(Ïƒ*+

_{x}*Ïƒ*/2 + (1/2)

_{y})*×*

*√[(Ïƒ*+ 4

_{x}- Ïƒ_{y})²*Ï„²*

_{xy}]- (B)

*(Ïƒ*+

_{x}*Ïƒ*/2

_{y})*-*(1/2)

*×*

*√[(Ïƒ*+ 4

_{x}- Ïƒ_{y})²*Ï„²*

_{xy}]- (C)

*(Ïƒ*/2 + (1/2) ×

_{x}- Ïƒ_{y})*√[(Ïƒ*+

_{x}*Ïƒ*+ 4

_{y})²*Ï„²*

_{xy}]- (D)

*(Ïƒ*/2 - (1/2) ×

_{x}- Ïƒ_{y})*√[(Ïƒ*+

_{x}*Ïƒ*+ 4

_{y})²*Ï„²*

_{xy}]**13. The stress at which extension of the material takes place more quickly as compared to the increase in load is called**

- (A) Elastic point of the material

- (B) Plastic point of the material

- (C) Breaking point of the material

- (D) Yielding point of the material

**14. A cantilever beam is one which is**

- (A) Fixed
at both ends

- (B) Fixed at one
end and free at the other end

- (C) Supported at
its ends

- (D) Supported on
more than two supports

**15. In a prismatic member made of two materials so joined that they deform equally under axial stress, the unit stresses in two materials are**

- (A) Equal

- (B) Proportional to their
respective moduli of elasticity

- (C) Inversely
proportional to their moduli of elasticity

- (D) Average of the sum of moduli of elasticity

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