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## Dynamics Of Machinery Important Questions Pdf file – DM Imp Qusts

Please find the attached pdf file of Dynamics Of Machinery Important Questions Bank – DM Imp Qusts

Link – DM Question Bank

**UNIT-I**

- What is the gyroscopic effect on a ship when it turns towardsleft and the propeller rotates counterclockwise when viewedfrom stern.
- What is the effect of gyroscopic couple on the stability of atwo wheeler taking a turn?
- Explain the gyroscopic effect on an aero plane.

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**UNIT – II**

- Explain the terms friction axis, friction couple and frictioncircle.
- Derive expression for the mean torque transmitted for a bodymoving down an inclined plane.
- Distinguish between brakes and dynamometers.

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**UNIT – III**

- Define the terms coefficient of fluctuation of energy andcoefficient of fluctuation of speed.
- What is a fly wheel? What is its function?
- Describe the turning moment diagram for a single cylinderdouble acting steam engine.

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**UNIT – IV**

- What is the necessity of balancing for rotors of high speedengines?
- What is meant by static and dynamic unbalance inmachinery?
- What is primary and secondary balancing in reciprocatingengines?

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**UNIT – V**

- Describe Dunkerley’s method to find the natural frequencyof a shaft carrying several loads.
- Distinguish between longitudinal, transverse and torsionalvibrations.
- What is critical or whirling speed of shaft?

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