Theory-of-machines Questions Set 18:
Which type of gear train is usually employed in clocks?
Solution:
When the sleeve of a Porter governor moves upwards, what happens to the governor speed?
Solution:
Find the addendum circle diameter for a 20° full depth system, if the pitch circle diameter of the gear is 100 mm and the number of teeth are 25.
Solution:
If the outer radius of the contact surface is 100 mm and the inner radius is 75 mm, and the semi-cone angle is 22.5°, find the required face width.
Solution:
The secondary force in a reciprocating engine mechanism is caused due to _____
Solution:
Which type of flywheel is preferable for the same mass of flywheel?
Solution:
Can a solid flywheel of an engine be replaced by a hollow flywheel, considering only the energy storing capacity?
Solution:
A solid disc flywheel connected to a punching machine has to supply energy of 800 N-m while running at a mean average speed of 50 rad/s. The total fluctuation of speed is not to exceed ±2%. If the radius of the flywheel is 500 mm, what is the mass of the flywheel?
Solution:
A horizontal bar 1.5 metres long and of small cross-section rotates about a vertical axis through one end. It accelerates uniformly from 1200 revolutions per minute (r.p.m.) to 1500 r.p.m. in an interval of 5 seconds. What is the linear velocity at the end of the interval?
Solution:
Find the center distance between the shafts if two spiral gears have a normal module of 10 mm and the angle between the skew shaft axes is 50°. The driver has 20 teeth and the helix angle of it is 30°. If the velocity ratio is 1/3 and the driver as well as the follower are both left-handed.
Solution:
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