EP PET-1

1. Elastic bodies _____________after the removal of applied forces

• a) can regain its original shape

• b) does not regain its original shape

• c) breaks down

• d) None of the above

2. The magnitude of restoring force is_______

• a) not equal to external forces

• b) equal to external force

• c) less than the external force

• d) greater than external force

3. What is the unit of stress?

• a) N/m^-2

• b) N/m²

• c) Nm

• d) no unit

4. What is strain?

• a) ratio of force per unit area

• b) ratio of change in dimension to original dimension

• c) stress is proportional to strain

• d) none of the above

5. Which one of the following is true as per Hooke’s law

• a) Deformation is proportional to force

• b) Force is proportional to deformation

• c) strain is proportional to stress

• d) stress is proportional to strain

6. How many types elastic moduli are there?

• a) Five

• b) Two

• c) Three

• d) Six

7. Youngs modulus is the ratio of

• a) linear strain to linear stress

• b) linear stress to linear strain

• c) volume stress to volume strain

• d) none of the above

8. Rigidity modulus is the ratio of

• a) shearing strain to shearing stress

• b) tangential stress to shearing strain

• c) volume stress to volume strain

• d) linear stress to linear strain

9. SI Unit of Bulk modulus is

• a) no unit

• b) Nm^-2

• c) Wm^-1K^-1

• d) Kelvin

10. What happens to the neutral axis when a beam is loaded?

• a) It undergoes elongation

• b) It undergoes compression

• c) It does not undergo elongation and compression

• d) None of the above