MCQ ~ Strength of Materials (1)

1. A hollow shaft of same cross-section area as solid shaft transmits

• Same torque
• Less torque
• More torque
• Unpredictable

2. In a cantilever beam, maximum deflection occurs at where

• Bending moment is zero
• Bending moment is maximum
• Shear force is zero
• Slope is zero

3. In a rectangular beam, when width, depth and length are doubled, the bending stress will be

• Shall remain unchanged
• Shall be doubled
• Shall become ¼ th
• Shall be halved

4. In an I –section beam, the bending moment is resisted mainly by

• Flanges only
• Web only
• Both by flanges and web
• None of the above

5. Strain energy is the

• Energy stored in a body when strained within elastic limits
• Energy stored in a body when strained up to the breaking of a specimen
• Maximum strain energy which can be stored in a body
• Proof resilience per unit volume of a material

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

• Zero
• Minimum
• maximum
• Infinity

7. Euler’s formula holds good only for

• Short columns
• Long columns
• Both short & long columns
• Weak columns

8. A steel bar of 5 mm is heated from 15° C to 40° C and it is free to expand. The bar Will induce

• No Stress
• Shear Stress
• Tensile Stress
• Compressive Stress

9. The stress induced in a body, when suddenly loaded, is __________ the stress induced when the same load is applied gradually.

• Equal to
• One-half
• Twice
• Four times

10. A body is subjected to a tensile stress of 1200 MPa on one plane and another tensile stress of 600 MPa on a plane at right angles to the former. It is also subjected to a shear stress of 400 MPa on the same planes. The maximum normal stress will be ? (See Solution)

• 400 MPa
• 500 MPa
• 900 MPa
• 1400 MPa