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ISRO ME 2019 THEORY OF MACHINES 4

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Question 1

A governor has a displacement of sleeve 5 cm and force required to raise the sleeve is 7.66 N. So the work done at the sleeve of the governor is _________.

Question 2

For a four bar mechanism with velocity ratio of output and input link as 1:3, If the mechanical advantage is equal to 2. The output link is assumed to be rotating in a circle such that the mechanism is double crank mechanism. Find the efficiency of power transmitted by the mechanism.

Question 3

For the given epicyclic gear train if the Gear B is fixed and arm C makes 10 revolutions, the number of revolutions made by gear A will be ___. Teeth on gear A and B are 25 and 100 respectively.

Question 4

A system of masses rotating in different parallel planes in dynamic balance if –

Question 5

The crank of a slider crank mechanism is 15 cm and the connecting rod is 60 cm long. The crank make 300 rpm in the clockwise direction, when it has turned 45° from the inner dead center position. Find the velocity of the slider __________ (in m/s).

Question 6

The magnitude of the gyroscopic moment is needed to be found for a XUV all wheel drive . A XUV moves over a curved horizontal road of radius 100 m with a speed of 20 m/s. When viewed from the front of the XUV, the rotating masses of the engine have an angular speed of 100 rad/s in clockwise direction. The combined moment of inertia of the rotating masses is 10 kg-m².

Question 7

The minimum number of links in a constrained planer mechanism involving revolute pairs and two higher pairs is _________.

Question 8

A mass spring dashpot system with mass m = 10kg, spring constant k=6250N/m is excited by a harmonic excitation of 10cos (25t). At steady condition, the vibration amplitude of the mass is 40mm. The damping coefficient (c, in Ns/m) of the dashpot will be

Question 9

In a flywheel, C_f represents coefficient of speed fluctuation, then which among the following expression will show ratio of ω_max / ω_min:

Question 10

The number of degree of freedom for the mechanism shown will be.

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ESE & GATE ME Theory of Machines & Vibrations

Mar 8ESE & GATE ME