# Practice Test: Question Set - 10

**1. A simply supported beam carrying a uniformly increasing load from either end and having the apex at the mid span is**

*WL*^{3}/60*EI*- (A) A simply
supported beam carrying a uniformly increasing load from either end and having
the apex at the mid span is

*WL*

^{3}/60

*EI*

- (B) A fixed
ended beam carrying a distributed load over the span is

*WL*

^{3}/384

*EI*

- (C) A fixed
ended beam carrying a concentrated load at the mid span is

*WL*

^{3}/192

*EI*

- (D) All the
above

**2. A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to**

- (A) 25

- (B) 50

- (C) 100

- (D) 250

**3. The B.M. of a cantilever beam shown in below figure at**

*A*, is- (A) Zero

- (B) 8 Tm

- (C) 12 Tm

- (D) 20 Tm

**4. A cantilever carries is uniformly distributed load**

*W*over its whole length and a force*W*acts at its free end upward. The net deflection of the free end will be- (A) Zero

- (B) (5/24) (

*WL*

^{3}/

*EI*) upward

- (C) (5/24) (

*WL*

^{3}/

*EI*) downward

- (D) None of
these

**5. The C.G. of a plane lamina will not be at its geometrical centre in the case of a**

- (A) Right angled triangle

- (B) Equilateral triangle

- (C) Square

- (D) Circle

**6. Struts are load carrying members of a frame structure which are subjected to**

- (A) Axial
tension loads

- (B) Axial compressive
loads

- (C) Torsional
loads

- (D) Transverse
loads

**7. Strain energy of a member may be equated to**

- (A) Average
resistance × displacement

- (B) ½ stress
× strain × area of its cross-section

- (C) ½ stress
× strain × volume of the member

- (D) ½ (stress)

^{2}× volume of the member + Young's modulus

*E*

**8. A force acting on a body may**

- (A) Introduce internal stresses

- (B) Balance the other forces acting on it

- (C) Retard its motion

- (D) All of the above

**9. A simply supported beam (**

*l*+ 2*a*) with equal overhangs (*a*) carries a uniformly distributed load over the whole length, the B.M. changes sign if- (A)

*l*> 2

*a*

- (B)

*l*< 2

*a*

- (C)

*l*= 2

*a*

- (D)

*l*= 4

*a*

**10. The stress in the wall of a cylinder in a direction normal to its longitudinal axis, due to a force acting along the circumference, is known as**

- (A) Yield stress

- (B) Longitudinal
stress

- (C) Hoop stress

- (D) Circumferential
stress

**11. According to principle of moments**

- (A) If a system of coplanar forces is in equilibrium,
then their algebraic sum is zero

- (B) If a system of coplanar forces is in
equilibrium, then the algebraic sum of their moments about any point in their
plane is zero

- (C) The algebraic sum of the moments of any two
forces about any point is equal to moment of their resultant about the same
point

- (D) Positive and negative couples can be
balanced

**12. The ratio of strengths of solid to hollow shafts, both having outside diameter**

*D*and hollow having inside diameter*D*/2, in torsion, is- (A) 1/4

- (B) 1/2

- (C) 1/16

- (D) 15/15

**13. Along the neutral axis of a simply supported beam**

- (A) Fibres
do not undergo strain

- (B) Fibres
undergo minimum strain

- (C) Fibres
undergo maximum strain

- (D) None of
these

**14. A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span**

- (A) 2.5 cm

- (B) 3.0 cm

- (C) 4.0 cm

- (D) 5.0 cm

**15. 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- (A)

*Mr*/

*Æ© r*

^{2}

- (B)

*Æ© r*

^{2}/

*Mr*

- (C)

*Mr*

^{2}/

*Æ© r*

^{2}

- (D) √

*Mr*/

*Æ© r*

^{2}

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