# Practice Test: Question Set - 20

**1. For a given material Young's modulus is 200 GN/m**

^{2}and modulus of rigidity is 80 GN/m^{2}. The value of Poisson's ratio is- (A) 0.15

- (B) 0.20

- (C) 0.25

- (D) 0.30

**2. The rise of a parabolic arch at quarter points, is equal to**

- (A) 1/3 times
the rise of the crown

- (B) 1/4 times
the rise of the crown

- (C) 1/2
times the rise of the crown

- (D) 3/4 times
the rise of the crown

**3. The number of points of contraflexure in a simple supported beam carrying uniformly distributed load, is**

- (A) 0

- (B) 1

- (C) 2

- (D) 3

**4. When two plates butt together and are riveted with two cover plates with two rows of rivets, the joint is known as**

- (A) Lap joint

- (B) Butt joint

- (C) Single riveted
single cover butt joint

- (D) Double
riveted double cover butt joint

**5. If the width of a simply supported beam carrying an isolated load at its centre is doubled, the deflection of the beam at the centre is changed by**

- (A) 1/2

- (B) 1/8

- (C) 2

- (D) 8

**6. The moment diagram for a cantilever carrying linearly varying load from zero at its free end and to maximum at the fixed end will be a**

- (A) Triangle

- (B) Rectangle

- (C) Parabola

- (D) Cubic
parabola

**7. When a rectangular beam is loaded longitudinally, shear develops on**

- (A) Bottom fibre

- (B) Top fibre

- (C) Middle fibre

- (D) Every-horizontal
plane

**8. For a simply supported beam carrying uniformly distributed load**

*W*on it entire length*L*, the maximum bending moment is- (A)

*WL*/4

- (B)

*WL*/8

- (C)

*WL*/2

- (D)

*WL*/3

**9. Along the principal plan subjected to maximum principal stress**

- (A) Maximum
shear stress acts

- (B) Minimum
shear stress acts

- (C) No shear
stress acts

- (D) None
of these

**10. The width of a beam of uniform strength having a constant depth**

*d*length*L*, simply supported at the ends with a central load*W*is- (A) 2

*WL*/3

*fd*

^{2}

- (B) 3

*WL*/2

*fd*

^{2}

- (C) 2

*fL*/3

*W*d

^{4}

- (D) 3

*fL*

^{2}/2

*Wd*

**11. The distance between the centres of adjacent rivets in the same row, is called**

- (A) Pitch

- (B) Lap

- (C) Gauge

- (D) Staggered
pitch

**12. Hooke's law states that stress and strain are**

- (A) Directly
proportional

- (B) Inversely
proportional

- (C) Curvilinearly
related

- (D) None of
these

**13. For a beam, if fundamental equations of statics are not sufficient to determine all the reactive forces at the supports, the structure is said to be**

- (A) Determinate

- (B) Statically
determinate

- (C) Statically
indeterminate

- (D) None of
these

**14. The tension coefficient of any member is**

- (A) Force
divided by the length

- (B) Tension
divided by the length

- (C) Tension
per unit area

- (D) Tension
in the member

**15. Rankine-Golden formula accounts for direct as well as buckling stress and is applicable to**

- (A) Very long
columns

- (B) Long columns

- (C) Short
columns

- (D) Intermediate
columns

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