Fundamentals of Vibration - Mechanical Engineering (MCQ) questions and answers

1)   In which type of vibrations, amplitude of vibration goes on decreasing every cycle?

a. Damped vibrations
b. Undamped vibrations
c. Both a. and b.
d. None of the above
Answer  Explanation 

ANSWER: Damped vibrations

Explanation:
No explanation is available for this question!
2)   During transverse vibrations, shaft is subjected to which type of stresses?

a. Tensile stresses
b. Torsional shear stress
c. Bending stresses
d. All of the above
Answer  Explanation 

ANSWER: Bending stresses

Explanation:
No explanation is available for this question!
3)   Calculate equivalent stiffness of the spring for the system shown below, which has spring stiffness of 3000 N/m

a. 1000 N/m
b. 2250 N/m
c. 2000 N/m
d. None of the above
Answer  Explanation 

ANSWER: 2250 N/m

Explanation:
No explanation is available for this question!
4)   Two springs have spring stiffness of 1500 N/m and 2000 N/m respectively. If they are connected in series, what is the spring stiffness if they are replaced by an equivalent system.3500 N/m

a. 3500 N/m
b. 1166 N/m
c. 857.63 N/m
d. None of the above
Answer  Explanation 

ANSWER: 857.63 N/m

Explanation:
No explanation is available for this question!
5)   Which type of vibrations are also known as transient vibrations?

a. Undamped vibrations
b. Damped vibrations
c. Torsional vibrations
d. Transverse vibrations
Answer  Explanation 

ANSWER: Damped vibrations

Explanation:
No explanation is available for this question!
6)   Which of the following relations is true when springs are connected parallelly?
where K = spring stiffness

a. Ke = K1 + K2
b. (1 / Ke) = (1/K1) + (1/ K2)
c. Ke = (1/K1) + (1/ K2)
d. None of the above
Answer  Explanation 

ANSWER: Ke = K1 + K2

Explanation:
No explanation is available for this question!
7)   What are deterministic vibrations?

a. Vibrations caused due to known exciting force
b. Vibrations caused due to unknown exciting force
c. Vibrations which are aperiodic in nature
d. None of the above
Answer  Explanation 

ANSWER: Vibrations caused due to known exciting force

Explanation:
No explanation is available for this question!
8)   Which of the following vibrations are classified according to magnitude of actuating force?

a. Torsional vibrations
b. Deterministic vibrations
c. Transverse vibrations
d. All of the above
Answer  Explanation 

ANSWER: Deterministic vibrations

Explanation:
No explanation is available for this question!
9)   What are discrete parameter systems?

a. Systems which have infinite number of degree of freedom
b. Systems which have finite number of degree of freedom
c. Systems which have no degree of freedom
d. None of the above
Answer  Explanation 

ANSWER: Systems which have finite number of degree of freedom

Explanation:
No explanation is available for this question!
10)   Which among the following is the fundamental equation of S.H.M.?

a. x + (k / m) x =0
b. x + ω2x =0
c. x + (k/ m)2 x =0
d. x2 + ωx2 =0
Answer  Explanation 

ANSWER: x + ω2x =0

Explanation:
No explanation is available for this question!

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