This document contains 25 multiple choice questions related to engineering mechanics topics like stress, strain, bending moments, shear force, torsion, springs, and beam deflection. The questions cover definitions of terms, relationships between different mechanical properties, locations of maximum bending moment and shear stress in beams, units of different mechanical quantities, and expressions used in bending, torsion, and power transmission equations.

1. 1. The dimension of strain is__ ( )
A. m B. N C. KN-m D. Dimensionless
2. The property by which a body returns to its original shape after removal of the force is called ( )
A. Plasticity B. Elasticity C. Ductility D. Malleability
3. Which point on the stress strain curve occurs after the ultimate point? ( )
A. Last point B. Breaking point C. Elastic limit D. Material limit
4. What is the bulk modulus of elasticity? ( )
A. The ratio of shear stress to shear strain B. The ratio of direct stress to direct strain
C. The ratio of volumetric stress to volumetric strain D. The ratio of direct stress to volumetric strain
5. What is the relationship between modulus of elasticity and modulus of rigidity? ( )
A. C = E / 2(1 + μ) B. C = E / (1 + μ) C. C = 2E / (1 + μ) D. C = 2E / 2(1 + μ)
6. If the end portion of the beam is extended beyond the support, such beam is known as_____ ( )
A. Simply supported beam B. Cantilever beam C. Over hanging beam D. Fixed beam
7. If a cantilever is carrying uniformly distributed load throughout the span, the maximum bending moment occurs at ( )
A. Fixed end B. free end C. mid span D. everywhere along span
8. Rate of change of Bending Moment is equal to ( )
A. Shear force B. Tension C. Compression D. Bending force
9. The Shear force between any two vertical loads is(point loads) ( )
A. constant B. Zero C. Maximum D. Minimum
10. When SF is zero, the bending moment is _____ ( )
A. Zero B. Maximum C. Very difficult to say D. Minimum
11. What is the expression of the bending equation? ( )
A. M/I = F/y = E/R B. M/R = F/y = E/I C. M/y = F/R = E/I D. M/I = F/R = E/y
12. What are the units for section modulus? ( )
A. m2 B. m4 C. m3 D. m
13. The maximum shear stress is ______ times the average shear stress [For rectangular beams]. ( )
A. 2.5 B. 3 C. 1.2 D. 1.5
14. Shear stress in a beam is zero at ______ ( )
A. Neutral axis B. Extreme fibres C. Cross section D. Junctions
15. For circular section, the maximum shear stress is equal to __ times of average shear stress. ( )
A. 2/3 B. 3/2 C. 4/3 D. ¾
16. When a shaft is subjected to a twisting moment, every cross-section of the shaft will be under ( )
A. Tensile stress B. Compressive stress C. Shear stress D. Continuous strain
17. The unit of Torque in SI units ( )
A. kg-m B. kg-cm C. kg-mm D. N-m
18. In power transmission equation, P=2ΠNT/60×1000 ( )
A. P is in kw and T is maximum torque B. P is in NM/sec and T is maximum torque
C. P is in NM/sec and T is mean torque D. P is in kw and T is mean torque
19. Spring is used to ( )
A. absorb shock B. accelerate speed C. reduce speed D. maintain constant speed
20. Stiffness of the Spring is ( )
A. load required to cause unit deflection of the spring B. ratio of mean coil radius
C. solid length of the spring D. diameter of the spring
21. What is the unit of slope? ( )
A. m B. cm C. Radian or Degree D. KN
22. At the fixed end of cantilever beam, deflection is __________ ( )
A. constant B. Minimum C. Maximum D. Zero
23. At the both ends of simply supported beam, deflection is __________ . ( )
A. Maximum B. Zero C. constant D. Minimum
24. At the centre of simply supported beam, deflection is _________ ( )
A. Constant B. Zero C. Maximum D. Minimum
25. The product of Modulus of Elasticity (E) and Moment of Inertia (I) is called as ( )
A. Polar moment B. Flexural Rigidity C. Stiffness D. Modulus of rigidity