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The vibration parallel to the shaft axis are known as ______ vibrations.

Q.  
The vibration parallel to the shaft axis are known as ______ vibrations.


Answer & Explanation

Answer :   Option: B


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More Questions Dynamics of Machinery:

Q.  
Often an unbalance of forces is produced in rotary or reciprocating machinery due to the ______.

A. Centripetal forces

B. Centrifugal forces

C. Friction forces

D. Inertia forces


Answer & Explanation

Q.  
Find the critical speed of the shaft when natural frequency 12 rad/sec and wavelength of 4 m.

A. 0.764 m/sec

B. 7.64 m/sec

C. 76.4m/sec

D. 764 m/sec


Answer & Explanation

Q.  
Amplitude in two rotor torsional vibrations is in

A. Same direction

B. Opposite direction

C. Perpendicular direction

D. Parallel to the forces


Answer & Explanation

Q.  
The sound field which is formed by multiple reflections from obstacles or barriers like walls, floor and celling surfaces etc in the room is called as

A. Near field

B. Reverberant field

C. Free field

D. Sound field


Answer & Explanation
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