1
GATE ME 2013
MCQ (Single Correct Answer)
+2
-0.6
A flywheel connected to a punching machine has to supply energy of $$400$$ Nm while running at a mean angular speed of $$20$$ rad/s. If the total fluctuation of speed is not to exceed $$ \pm 20\% $$, the mass moment of inertia of the flywheel in kg-m2 is
A
$$25$$
B
$$50$$
C
$$100$$
D
$$125$$
2
GATE ME 2007
MCQ (Single Correct Answer)
+2
-0.6
The speed of an engine varies from $$210$$ rad/s to $$190$$ rad/s. During cycle the change in kinetic energy is found to be $$400$$ Nm. The inertia of the flywheel in kgm2 is
A
$$0.10$$
B
$$0.20$$
C
$$0.30$$
D
$$0.40$$
3
GATE ME 2006
MCQ (Single Correct Answer)
+2
-0.6
If $${C_f}$$ is the coefficient of speed fluctuation of a flywheel then the ratio of $${\omega _{\max }}/{\omega _{\min }}$$ will be
A
$${{1 - 2{C_f}} \over {1 + 2{C_f}}}$$
B
$${{2 - {C_f}} \over {2 + {C_f}}}$$
C
$${{1 - 2{C_f}} \over {1 - 2{C_f}}}$$
D
$${{2 + {C_f}} \over {2 - {C_f}}}$$
4
GATE ME 2003
MCQ (Single Correct Answer)
+2
-0.6
For a certain engine having an average speed of $$1200$$ rpm, a flywheel approximated as a solid disc, is required for keeping the fluctuation of speed within $$2$$% about the average speed. The fluctuation of kinetic energy per cycle is found to be $$2$$kJ. What is the least possible mass of the flywheel if its diameter is not exceed $$1$$ m?
A
$$40$$ kg
B
$$51$$ kg
C
$$62$$ kg
D
$$73$$ kg
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