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Mechanical Engineering - Theory of machines

Exercise : Theory of machines - Section 9
46.
A flywheel is fitted to the crankshaft of an engine having W as the amount of indicated work per revolution and permissible limits of coefficient of fluctuation of energy and speed as CE and CS respectively. The kinetic energy of the flywheel is given by
Answer: Option
Explanation:
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47.
When the connection between the elements forming a pair is such that the constrained motion is not completed by itself, but by some other means, the motion is said to be a completely constrained motion,
Yes
No
Answer: Option
Explanation:
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48.
In gears, interference takes place when
the tip of a tooth of a mating gear digs into the portion between base and root circles
gears do not move smoothly in the absence of lubrication
pitch of the gears is not same
gear teeth are undercut
Answer: Option
Explanation:
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49.
The ratio of maximum fluctuation of speed to the mean speed is called
fluctuation of speed
maximum fluctuation of speed
coefficient of fluctuation of speed
none of these
Answer: Option
Explanation:
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50.
Which of the following statement is correct for involute gears?
The interference is inherently absent.
The variation in centre distance of shafts increases radial force.
A convex flank is always in contact with concave flank.
The pressure angle is constant throughout the teeth engagement.
Answer: Option
Explanation:
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