# Practice Test: Question Set - 02

**1. A hollow shaft of same cross-section area as compared to a solid shaft transmit**

- (A) Same
torque

- (B) Less
torque

- (C) More
torque

- (D) Unpredictable

**2. A steel bar of 5 mm is heated from 25°C to 45°C and it is free to expand. The bar will induce**

- (A) No
stress

- (B) Shear
stress

- (C) Tensile
stress

- (D) Compressive
stress

**3. Two shafts '**

*A*' and '*B*' transmit the same power. The speed of shaft '*A*' is 250 r.p.m. and that of shaft '*B*' is 300 r.p.m.- (A) The
shaft '

*B*' has the greater diameter

- (B) The
shaft 'A' has the greater diameter

- (C) Both
are of same diameter

- (D) None
of these

**4. The intensity of stress which causes unit strain is called**

- (A) Unit mass

- (B) Modulus
of rigidity

- (C) Bulk
modulus

- (D) Modulus
of Elasticity

**5. A thick cylindrical shell having r**

_{o}*and r*_{i}*as outer and inner radii, is subjected to an internal pressure (**p*). The maximum tangential stress at the inner surface of the shell is- (A)

*(r*

_{o}² - r_{i}²)/ 2p r_{i}²- (B) 2

*p r*

_{i}²/ (r_{o}² - r_{i}²)- (C)

*p (r*

_{o}² + r_{i}²)/ (r_{o}² - r_{i}²)- (D)

*p (r*

_{o}² - r_{i}²)/ (r_{o}² + r_{i}²)**6. A vertical column has two moments of inertia (i.e. I**

_{xx}*and I*_{yy}*). The column will tend to buckle in the direction of the*- (A) Axis of load

- (B) Perpendicular
to the axis of load

- (C) Maximum
moment of inertia

- (D) Minimum
moment of inertia

**7. Strain energy is the**

- (A) Energy
stored in a body when strained within elastic limits

- (B) Energy
stored in a body when strained up to the breaking of a specimen

- (C) Maximum
strain energy which can be stored in a body

- (D) Proof
resilience per unit volume of a material

**8. The neutral axis of the cross-section a beam is that axis at which the bending stress is**

- (A) Zero

- (B) Minimum

- (C) Maximum

- (D) Infinity

**9. A composite bar made up of steel and copper bars of equal lengths are heated through 100°C. The stresses developed shall be**

- (A) Tensile
in both the material

- (B) Tensile
in steel and compressive in copper

- (C) Compressive
in steel and tensile in copper

- (D) Compressive
in both the materials

**10. Euler's formula holds good only for**

- (A) Short
columns

- (B) Long
columns

- (C) Both
short and long columns

- (D) Weak
columns

**11. The bending moment at a point on a beam is the algebraic ________ of all the moments on either side of the point.**

- (A) Sum

- (B) Difference

- (C) Multiplication

- (D) None of the
above

**12. The maximum diameter of the hole that can be punched from a plate of maximum shear stress 1/4th of its maximum crushing stress of punch, is equal to (where**

*t*= Thickness of the plate)- (A)

*t*

- (B) 2

*t*

- (C) 4

*t*

- (D) 8

*t*

**13. Within elastic limit, stress is**

- (A) Inversely
proportional to strain

- (B) Directly
proportional to strain

- (C) Square
root of strain

- (D) Equal
to strain

**14. Two closely coiled helical springs '**

*A*' and '*B*' are equal in all respects but the number of turns of spring '*A*' is half that of spring '*B*' The ratio of deflections in spring '*A*' to spring '*B*' is- (A)

*1/8*

- (B)

*1/4*

- (C)

*1/2*

- (D)

*2*

**15. The deformation per unit length is called**

- (A) Tensile
stress

- (B) Compressive
stress

- (C) Shear
stress

- (D) Strain

**View All Answers**

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