Governors MCQ

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• For a governor, if FC is the controlling force, r is the radius of rotation of the balls, the stability of the governor will be ensured when
  ক

  dFC /dr > FC/r

  খ

  dFC /dr C /r

  গ

  dFC /dr = 0

  ঘ

  none of the mentioned
• When the relation between the controlling force (FC) and radius of rotation (r) for a spring controlled governor is FC = a.r + b, then the governor will be
  ক

  stable

  খ

  unstable

  গ

  isochronous

  ঘ

  none of the mentioned
• The power of a governor is equal to
  ক

  (c2/1 + 2c )(m + M) h

  খ

  (2c2/1 + 2c )(m + M) h

  গ

  (3c2/1 + 2c )(m + M) h

  ঘ

  (4c2/1 + 2c )(m + M) h
• Isochronism in a governor is desirable when
  ক

  the engine operates at low speeds

  খ

  the engine operates at high speeds

  গ

  the engine operates at variable speeds

  ঘ

  one speed is desired under one load
• A hunting governor is
  ক

  more stable

  খ

  less sensitive

  গ

  more sensitive

  ঘ

  none of the mentioned
• A governor is said to be hunting, if the speed of the engine
  ক

  remains constant at the mean speed

  খ

  is above the mean speed

  গ

  is below the mean speed

  ঘ

  fluctuates continuously above and below the mean speed
• In a Hartnell governor, if a spring of greater stiffness is used, then the governor will be
  ক

  more sensitive

  খ

  less sensitive

  গ

  isochronous

  ঘ

  none of the mentioned
• The sensitiveness of a governor is given by
  ক

  ωmean/ω2 – ω1

  খ

  ω2 – ω1/ ωmean

  গ

  ω2 – ω1/ 2ωmean

  ঘ

  none of the mentioned
• For two governors A and B, the lift of sleeve of governor A is more than that of governor B, for a given fractional change in speed. It indicates that
  ক

  governor A is more sensitive than governor B

  খ

  governor B is more sensitive than governor A

  গ

  both governors A and B are equally sensitive

  ঘ

  none of the mentioned
• Which of the following is a spring controlled governor?
  ক

  Hartnell

  খ

  Hartung

  গ

  Pickering

  ঘ

  all of the mentioned
• Which of the following governor is used to drive a gramophone ?
  ক

  Watt governor

  খ

  Porter governor

  গ

  Pickering governor

  ঘ

  Hartnell governor
• A Hartnell governor is a
  ক

  pendulum type governor

  খ

  spring loaded governor

  গ

  dead weight governor

  ঘ

  inertia governor
• When the sleeve of a Porter governor moves upwards, the governor speed
  ক

  increases

  খ

  decreases

  গ

  remains unaffected

  ঘ

  none of the mentioned
• The ratio of the height of a Porter governor (when the length of arms and links are equal) to the height of a Watt’s governor is
  ক

  m/m+M

  খ

  M/m+M

  গ

  m + M/m

  ঘ

  m + M/M
• The height of a Watt’s governor (in metres) in equal to
  ক

  8.95/N2

  খ

  89.5/N2

  গ

  895/N2

  ঘ

  8950/N2