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ESE ME 2018 Achiever Study Plan: Theory of Machines Quiz 3
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Question 1
Consider the following statements:
1) Balancing of several masses rotating in the same plane can be effected by a single mass.
2) Balancing of several masses in different planes can be done by 2 masses in 2 planes on either side of the reference plane or on the same side.
3) Reciprocating masses cannot be completely balanced by rotating masses.
4) Secondary unbalanced forces will be negligible compared to primary unbalanced forces.
Which of the above statements are correct?
1) Balancing of several masses rotating in the same plane can be effected by a single mass.
2) Balancing of several masses in different planes can be done by 2 masses in 2 planes on either side of the reference plane or on the same side.
3) Reciprocating masses cannot be completely balanced by rotating masses.
4) Secondary unbalanced forces will be negligible compared to primary unbalanced forces.
Which of the above statements are correct?
Question 2
In a circular are cam with a roller follower, acceleration of the follower depends on
1) cam speed and location of centre of circular arc
2) roller diameter and radius of circular arc
Which of the above is/are correct?
1) cam speed and location of centre of circular arc
2) roller diameter and radius of circular arc
Which of the above is/are correct?
Question 3
Why is an offset provided in a radial cam-translating follower mechanism?
Question 4
Consider the following statements:
Assertion (A): Link A experiences Coriolis acceleration relative to the fixed link.
Reason (R): Slotted link A is rotating with angular velocity w and Block B slides in the slot of A.
Assertion (A): Link A experiences Coriolis acceleration relative to the fixed link.
Reason (R): Slotted link A is rotating with angular velocity w and Block B slides in the slot of A.
Question 5
In a crank and slotted lever type quick return mechanism, the link moves with an angular velocity of 20 rad/s, while the slider moves with a linear velocity of 1.5 m/s. The magnitude and direction of Coriolis component of acceleration with respect to angular velocity are
Question 6
A governor is said to be isochronous when the equilibrium speed is
Question 7
The flywheel of a steam engine has a radius of gyration of 1 m and mass 2000 kg. The starting torque of the engine is 2000 N-m. The kinetic energy of the flywheel after 10 seconds from start is
Question 8
In Crank and slotted lever quick return motion mechanism, which transmits motion to the ram?
Question 9
An epicyclic gear train has 3 shafts A, B and C, A is the input shaft running at 100 r.p.m. clockwise. B is the output shaft running at 250 r.p.m. clockwise. The torque on A is 50 kN m (clockwise), C is a fixed shaft. The torque needed to fix C is
Question 10
The natural frequency of the system shown in the figure below will increase when
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