1.4 Select the most appropriate answer from the multiple choices given: 1. The w

Question

1.4 Select the most appropriate answer from the multiple choices given: 1. The world's first seismograph was invented in 2. The first experiments on simple pendulums were conducted by 3. The Philosophiae Naturalis Principia Mathematica was published by 4. Mode shapes of plates, by placing sand on vibrating plates, were first observed by 5. The thick beam theory was first presented by 6. The number of degrees of freedom of a simple pendulum is: 7. Vibration can be classified in 8. Gibbs' phenomenon denotes an anomalous behavior in the Fourier series representation of a 9. The graphical representation of the amplitudes and phase angles of the various frequency (a) Japan (a) Galileo (a) Galileo (a) Chladni (a) Mindlin (a) 0 (a) one way (a) harmonic function components of a periodic function is known as a (b) China (b) Pythagoras (b) Pythagoras (b) D'Alembert (b) Einstein (b) 1 (b) two ways (c) Egypt (c) Aristotle (c) Newton (c) Galileo (c) Timoshenko (c) 2 (c) several ways (b) periodic function (c) random function 10. When a system vibrates in a fluid medium, the damping is 11. When parts of a vibrating system slide on a dry surface, the damping is 12. When the stress-strain curve of the material of a vibrating system exhibits a hysteresis (a) spectral diagram (b frequency diagram (c harmonic diagram (a) viscous (a) viscous loop, the damping is (b) Coulomb (c) solid (b) Coulomb (c) solid (a) viscous (b) Coulomb (c) solid Mech.MuslimEngineer.Net NDAMENTALS OF MBRATION 13. The equivalent spring constant of two parallel springs with stiffnesses k and k2 is (a) ki + k2 14. The equivalent spring constant of two series springs with stiffnesses ki and k2 is (a) ki +k2 15. The spring constant of a cantilever beam with an end mass m is 3EI (b) 3EI 3E 16. If ft-)-f(), function Jt is said to be (a) even (b) odd (c) continuous

Explanation / Answer

1) b: By Chinese astronomer Chang Heng

2) Option a

3) Option C: Newton

4) Optiona: chladni a german musician and physician

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