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6.SSC JE (ME) Theory of Machines Booster Quiz-3
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Question 1
Calculate damping ratio from the following data:
mass = 200Kg
ω = 20 rad/s
damping coefficient = 800 N/m/s
mass = 200Kg
ω = 20 rad/s
damping coefficient = 800 N/m/s
Question 2
What type of mechanism is shown in the given diagram? (All the dimensions are in mm)
Question 3
For a crank and slotted lever quick return mechanism, α = 150°. Find the ratio of time of cutting stroke to time of return stroke.
Question 4
The circle passing through the roots of the teeth is called ________________
Question 5
If the contact ratio is 2.7, two pairs of teeth are always in contact and three pairs of teeth are in contact for _________ % of the time.
Question 6
Which ratio defines the height of a porter governor to that of the watt governor for equal arm and link lengths, where m is the mass of the ball and M is the mass of the sleeve?
Question 7
Maximum efficiency of worm gear is given by:
Question 8
A flywheel connected to a punching machine has a mean angular speed 10 rad/s. if total fluctuation of speed is not to exceed ±1 % and the mass moment of inertia is 50 kg-m2. The energy supplied by the flywheel __________.
Question 9
Which of the following cam follower has the highest wear rate?
Question 10
The swaying couple is due to the
i. primary unbalanced force
ii. secondary unbalanced force
iii. three locomotive cylinders
iv. partial balancing
i. primary unbalanced force
ii. secondary unbalanced force
iii. three locomotive cylinders
iv. partial balancing
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