Explore topic-wise MCQs in Machine Dynamics.

This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Machine Dynamics knowledge and support exam preparation. Choose a topic below to get started.

1.

Frequency is independent of the no. of nodes.

A. True
B. False
Answer» C.
Discussion
2.

A single cylinder oil engine works with a three rotor system, the shaft length is 2.5m and 70mm in diameter, the middle rotor is at a distance 1.5m from one end. Calculate the free torsional vibration frequency for a two node system in Hz if the mass moment of inertia of rotors in Kg-m2 are: 0.15, 0.3 and 0.09. C=84 kN/mm2

A. 257
B. 281
C. 197
D. 277
Answer» E.
Discussion
3.

A single cylinder oil engine works with a three rotor system, the shaft length is 2.5m and 70mm in diameter, the middle rotor is at a distance 1.5m from one end. Calculate the free torsional vibration frequency for a single node system in Hz if the mass moment of inertia of rotors in Kg-m2 are: 0.15, 0.3 and 0.09. C=84 kN/mm2

A. 171
B. 181
C. 191
D. 201
Answer» B. 181
Discussion
4.

For a vibration system having different shaft parameters, calculate which of the following cannot be the diameter of the equivalent shaft if the diameters of shafts in m are: 0.05, 0.06, 0.07.

A. 0.05
B. 0.06
C. 0.07
D. 0.08
Answer» E.
Discussion
5.

From the following data, calculate the location of node from the left end of shaft (l1).l1=0.6m, l2=0.5m, l3=0.4md1=0.095m, d2=0.06m, d3=0.05mMa = 900 Kg, Mb = 700 Kgka = 0.85m, kb = 0.55m

A. 0.855m
B. 0.795m
C. 0.695m
D. 0.595m
Answer» B. 0.795m
Discussion
6.

From the following data, calculate natural frequency of free torsional vibrations in Hz.l1=0.6m, l2=0.5m, l3=0.4md1=0.095m, d2=0.06m, d3=0.05mMa = 900 Kg, Mb = 700 Kgka = 0.85m, kb = 0.55mC = 80 GN/m2

A. 3.37
B. 7.95
C. 6.95
D. 5.95
Answer» B. 7.95
Discussion
7.

In a system with different shaft parameters, the longest shaft is taken for calculations.

A. True
B. False
Answer» C.
Discussion
8.

From the following data, calculate the equivalent length of shaft in m.l1=0.6m, l2=0.5m, l3=0.4md1=0.095m, d2=0.06m, d3=0.05m

A. 8.95
B. 7.95
C. 6.95
D. 5.95
Answer» B. 7.95
Discussion