# Mechanical Vibrations Questions and Answers – Importance of the Study of Vibration

This set of Mechanical Vibrations Multiple Choice Questions & Answers (MCQs) focuses on “Importance of the Study of Vibration”.

1. The Study of Vibrations is strongly recommended
a) to identify the result of Oscillations of any structural or mechanical system
b) to help the mechanical systems to vibrate more
c) to stop the structural systems
d) to stop the mechanical systems

Explanation: Vibration is a result of Oscillatory motion of any structural or mechanical system is strongly recommended to identify the result of vibration on above systems, which also helps to identify the wear of any mechanical systems.

2. Vibration in any automobile systems
a) does not cause any problems
b) causes unbalance in automotive engines
c) increase in fuel economy of engines
d) speed up the engine

Explanation: In any automobile systems vibration causes many problems like unbearable sounds,wear and tear & unbalance which is due to improper fastening of mechanical elements.

3. Vibrations are one of the reason for failure of Bridges
a) Yes
b) No

Explanation: Vibrations make the mechanical elements to loose which may result in sudden leakages, deflections and failure.

4. The study of vibrations is not important to reduce vibrations through correct fastening of fasteners
a) Yes
b) No

Explanation:Vibrations are one of the reason for any mechanical failure.So, It is highly recommended to study the vibrations to reduce vibrations through correct fastening of fasteners.

5. Note 1:Mechanical engineers focus on design parameters of engines to minimize unbalance due to vibrations
Note 2:Structural engineers focus on design of supporting structure in order to avoid imbalance due to vibrations
a) Note 1 is correct
b) Note 2 is correct
c) Note 1 &2 are correct
d) Note 1 &2 are not correct

Explanation: The effect of Vibrations will result in Both mechanical and structural system. So, the respective engineers will always try to minimize the effect of vibrations on respective systems.

6. Note 1 : The study of Vibrations is useful to research on earthquakes
Note 2 : The study of Vibrations is not useful in making of vibratory equipment’s such as conveyors
a) Note 1 is incorrect
b) Note 2 is correct
c) Note 1 is correct
d) Note 2 is incorrect

Explanation:The study of vibrations is useful in making of vibratory equipment’s such as hoppers, conveyors, sieves and in Earthquake researches.

7. Vibrations are formed when the external force is applied on the system that is by
a) change in displacement of an inertia element in the system
b) tight fastening of fasteners
c) proper balancing of mechanical elements
d) change in environment

Explanation:The displacement of an inertia element from equilibrium position will result in vibrations in the systems.

8. ——————– is used to protect passengers from uncomfortable situation when moving over rough land
a) Vehicle pumping system
b) Vehicle suspension system
c) Vehicle lubrication system
d) Vehicle cooling system

Explanation: Vehicle suspension system is used to prevent the road shocks from being transmitted
to the vehicle components.

9. —————- take vibrations which is not required
a) Energy Harvester
b) Supercharger
c) Suspension system
d) Pumping system

Explanation: Energy Harvester takes unwanted vibrations and turns into stored energy.

10. Sentence 1: MEMS (Micro- electro mechanical) systems use concept of vibrations
Sentence 2: NEMS ( nano- electro mechanical ) systems use concept of vibrations
a) Sentence 1 is incorrect
b) Sentence 2 is correct
c) Sentence 1 &2 are correct
d) Sentence 1 &2 are incorrect

Explanation: MEMS and NEMS use concepts of vibration. Its sensors are designed by the
principle of vibration.

11. The study of vibrations starts with—————- of vibrating systems
a) Mathematical modeling
b) Experimental modeling
c) Analytical modeling
d) Bio mechanical modeling

Explanation: Mathematical modeling of vibrating systems should be known to begin the study of vibrations. Solution for that modeling are obtained and analyzed.

Sanfoundry Global Education & Learning Series – Mechanical Vibrations.

To practice all areas of Mechanical Vibrations, here is complete set of Multiple Choice Questions and Answers.

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