Machine Dynamics Questions and Answers – Hartung Governor

This set of Machine Dynamics Multiple Choice Questions & Answers (MCQs) focuses on “Hartung Governor”.

1. If the controlling force line for a spring controlled governor when produced intersects the Y-axis at the origin, then the governor is said to be
a) stable
b) unstable
c) isochronous
d) none of the mentioned
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2. If the controlling force line for a spring controlled governor when produced intersects the Y-axis at the origin, then the governor is said to be unstable.
a) True
b) False
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3. The relation between the controlling force (F_c) and radius of rotation (r) for a stable spring controlled governor is
a) F_c = ar + b
b) F_c = ar – b
c) F_c = ar
d) F_c = a/r + b
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4. A spring controlled governor is said to be unstable, if the relation between the controlling force (F_c) and radius of rotation(r) is F_c = ar
a) True
b) False
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5. When the relation between the controlling force (F_c) and radius of rotation (r) for a spring controlled governor is F_c = ar + b, then the governor will be
a) stable
b) unstable
c) isochronous
d) none of the mentioned
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6. A Hartnell governor has its controlling force (F_c) given by F_c = ar + b, where r is the radius of rotation and a and b are constants. The governor becomes isochronous when
a) a is + ve and b = 0
b) a = 0 and b is +ve
c) a is +ve and b is -ve
d) a is +ve and b is also +ve
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7. Calculate the vertical height of a Watt governor when it rotates at 60 r.p.m.
a) 0.248 m
b) 0.248 m
c) 0.448 m
d) 0.548 m
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8. The power of a governor is the work done at
a) the governor balls for change of speed
b) the sleeve for zero change of speed
c) the sleeve for a given rate of change of change
d) each governor ball for given percentage change of speed
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9. In a governor, if the equilibrium speed is constant for all radii of rotation of balls, the governor is said to be
a) Stable
b) unstable
c) inertial
d) isochronous
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10. A governor is said to be isochronous when the equilibrium speed is
a) variable for different radii of rotation of governor balls
b) constant for all radii of rotation of the balls within the working range
c) constant for particular radii of rotation of governor balls
d) constant for only one radius of rotation of governor balls
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Sanfoundry Global Education & Learning Series – Machine Dynamics.
To practice all areas of Machine Dynamics, here is complete set of 1000+ Multiple Choice Questions and Answers.

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