# Practice Test: Question Set - 23

**1. The shear force of a cantilever beam of length**

*l*and carrying a gradually varying load from zero at the free end and*w*per unit length at the fixed end is _________ at the fixed end.- (A) Zero

- (B)

*wl*/4

- (C)

*wl*/2

- (D)

*wl*

**2. The modulus of elasticity for mild steel is approximately equal to**

- (A) 10 kN/mm²

- (B) 80 kN/mm²

- (C) 100 kN/mm²

- (D) 210 kN/mm²

**3. The direct stress induced in a long column is __________ as compared to bending stress.**

- (A) Same

- (B) More

- (C) Less

- (D) Negligible

**4. For a 25 mm hole drilled in plates, the diameter of rivet shank should be**

- (A) 23 mm

- (B) 24.5 mm

- (C) 25 mm

- (D) 26 mm

**5. The elongation of a conical bar under its own weight is __________ that of prismatic bar of the same length.**

- (A) Equal to

- (B) Half

- (C) One-third

- (D) Two-third

**6. A bolt is made to pass through a tube and both of them are tightly fitted with the help of washers and nuts. If the nut is tightened, then**

- (A) Bolt and
tube are under tension

- (B) Bolt
and tube are under compression

- (C) Bolt
is under compression and tube is under tension

- (D) Bolt
is under tension and tube is under compression

**7. Two shafts '**

*A*' and '*B*' have the same material. The shaft '*A*' is solid of diameter 100 mm. The shaft '*B*' is hollow with outer diameter 100 mm and inner diameter 50 mm. The torque transmitted by shaft '*B*' is __________ as that of shaft '*A*'.- (A) 1/6

- (B) 1/8

- (C) 1/4

- (D) 15/16

**8. Mohr's circle is used to determine the stresses on an oblique section of a body subjected to**

- (A) Direct
tensile stress in one plane accompanied by a shear stress

- (B) Direct
tensile stress in two mutually perpendicular directions

- (C) Direct
tensile stress in two mutually perpendicular directions accompanied by a simple
shear stress

- (D) All
of the above

**9. A steel bar 2 m long, 20 mm wide and 10 mm thick is subjected to a pull of 2 kN. If the same bar is subjected to a push of 2 kN, the Poisson’s ratio of the bar in tension will be __________ the Poisson's ratio for the bar in compression.**

- (A) Equal to

- (B) Less than

- (C) Greater
than

- (D) None
of these

**10. The assumption, generally, made in the theory of simple bending is that**

- (A) The
beam material is perfectly homogeneous and isotropic

- (B) The
beam material is stressed within its elastic limit

- (C) The
plane sections before bending remain plane after bending

- (D) All
of the above

**11. When a body is subjected to two equal and opposite pulls, as a result of which the body tends to extend its length, the stress and strain induced is**

- (A) Compressive
stress, tensile strain

- (B) Tensile
stress, compressive strain

- (C) Tensile
stress, tensile strain

- (D) Compressive
stress, compressive strain

**12. The thermal stress in a bar is __________ proportional to the change in temperature.**

- (A) Directly

- (B) Indirectly

- (C) Both A and B

- (D) None of
these

**13. A body is subjected to a direct tensile stress of 300 MPa in one plane accompanied by a simple shear stress of 200 MPa. The minimum normal stress will be**

- (A) -100 MPa

- (B) 250 MPa

- (C) 300 MPa

- (D) 400 MPa

**14. For the beam shown in the below figure, the shear force at**

*A*is equal to

- (A)

*wl*/6

- (B)

*wl*/3

- (C)

*wl*

- (D) 2

*wl*/3

**15. The maximum shear stress developed in a beam of circular section is __________ the average shear stress.**

- (A) Equal to

- (B) 4/3 times

- (C) 1.5 times

- (D) Twice

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