# Practice Test: Question Set - 01

**1. The modulus of rigidity of carbon steel is**

- (A) 2,07,000
N/mm

^{2}

- (B) 1,00,000
N/mm

^{2}

- (C) 50,000 N/mm

^{2}

- (D) 80,000 N/mm

^{2}

**2. Within elastic limit, the stress is**

- (A) Equal
to strain

- (B) Inversely
proportional to strain

- (C) Directly
proportional to strain

- (D) Directly
proportional to the square of strain

**3. When a shaft of diameter ‘**

*d’*and length*‘l’*is subjected to torsional moment M_{t}, then the angle of twist in degrees is given by,- (A) 584

*M*

_{t}

*l*/

*Gd*

^{4}

- (B)

*M*

_{t}

*l*/

*πd*

^{4}

- (C) 584

*M*

_{t}

*l*/

*Gd*

^{3}

- (D)

*M*

_{t}

*G*/

*d*

^{4}

*l*

**4. A component made of grey cast iron is designed on strength basis by**

- (A) Ultimate
tensile strength

- (B) Yield
strength

- (C) Modulus
of elasticity

- (D) Modulus
of rigidity

**5. A taper is provided for cotter**

- (A) To
ensure tightness in operating condition

- (B) To
provide wedge action

- (C) To
ease the removal of cotter during dismantling

- (D) For
all three reasons

**6. Knuckle joint is used for the joint between**

- (A) Tie
bars in roof trusses

- (B) Links
in suspension bridge

- (C) Fulcrum
of lever and support

- (D) For
all three applications

**7. In ‘second’ type of levers, mechanical advantage is**

- (A) Less
than one

- (B) More than
one

- (C) Equal to one

- (D) Any
one of the above

**8. The fulcrum pin of lever is designed on the basis of**

- (A) Torsional
moment

- (B) Axial
tensile force

- (C) Bending
moment

- (D) Bearing
pressure

**9. According to distortion energy theory of failure, the relationship between yield strength in shear (**

*S*_{sy}) and tensile yield strength (*S*_{yt}) is- (A)

*S*

_{sy}= 0.5

*S*

_{yt}

- (B)

*S*

_{sy}= 0.577

*S*

_{yt}

- (C)

*S*

_{sy}= 0.75

*S*

_{yt}

- (D)

*S*

_{sy}= 0.4

*S*

_{yt}

**10. The maximum bending stress in a curved beam, having symmetrical cross-section, always occurs at**

- (A) Inner
fiber

- (B) Outer fiber

- (C) Centroidal
axis

- (D) Neutral
axis

**11. Hooke’s law holds good up to**

- (A) Breaking
point

- (B) Yield point

- (C) Elastic
limit

- (D) Plastic
limit

**12. The modulus of rigidity of grey cast iron is**

- (A) 2,07,000
N/mm

^{2}

- (B) 1,00,000
N/mm

^{2}

- (C) 40,000 N/mm

^{2}

- (D) 80,000 N/mm

^{2}

**13. The ratio of tensile stress to tensile strain within elastic limit is called**

- (A) Bulk
modulus

- (B) Poisson’s
ratio

- (C) Modulus
of rigidity

- (D) Modulus
of elasticity

**14. The bending stress induced in a beam is**

- (A) Maximum
at the farthest fiber from neutral axis and zero at the neutral axis

- (B) Uniform
throughout the cross-section

- (C) Zero
at the farthest fiber from neutral axis and maximum at the neutral axis

- (D) Zero
at the neutral axis and zero at the farthest fiber and maximum at the mean
distance

**15. The factor of safety for cast iron component, subjected to static force, is**

- (A) 1.5 to 2

- (B) 3 to 5

- (C) 1.3 to 1.5

- (D) 5 to 10

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