An axial flow fan balanced at one speed often exhibits substantial vibrational effects when operated at other speeds, mainly due to

Theory of Machines Mcqs
BILAL KHATTAK0

A.Secondary critical speed effect
B.Primary critical speed effect
C.Unbalanced parts of fan
D.Aerodynamic unbalance
E.Vibration in air

Related Mcqs:

  1. The secondary critical speed of a shaft occurs at
  2. In Iocomotives, swaying couple is caused due to
  3. The swaying couple in a locomotive is due to
  4. Which of the following is a false stagement: The cause of excessive engine vibrations especially at high speeds in spark ignition engines is
  5. In case of reciprocating engine mechanism
  6. The specific speed for axial flow turbine varies from
  7. In case of axial flow compressors for minimum fluid driction and blade tip clearance losses, the blades of an axial flow compressor are disigned for
  8. Hemoglobin molecule exhibits which structural organization of proteins___________??
  9. In a drilling machine having six spindle speeds if first five speeds are 458, 605, 800, 1055 and 1390 rpm, the next higher speed would be
  10. Critical speed of turbine is

Leave a Reply

Your email address will not be published. Required fields are marked *