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GATE 2019 TOM SUPER QUIZ 1

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Question 1

Observe the mechanism that is shown below. Which link must be fixed to get the drag-link mechanism?

Question 2

Match List-I and List-II and select the correct answer using the codes given below the lists:
List-I
A- Four-bar chain
B- Gruebler’s criterion
C- Scotch Yoke
D- Pantograph
List-II
1- simple harmonic motion.
2- Grashoff’s linkage.
3- Enlargement.
4- Degree of freedom.

Question 3

In an elliptical trammel, which point surely does a circular motion _________?

Question 4

The circular disc shown in its plan view in the figure rotates in a plane parallel to the horizontal plane about the point O at a uniform angular velocity ω. Two other points A and B are located on the line OZ at distances and r_A r_B from O respectively.

The velocity of point B with respect to point A is a vector of magnitude

Question 5

A Quick return mechanism is shown below.The value of $Description: Description: 01_Tom-vibration_BLok_files\image094.png$ will be _________ (in degrees) stroke=60 cm
Length of slotted lever = 50 cm
$Description: Description: 01_Tom-vibration_BLok_files\image095.png$

Question 6

For what value of ω, the absolute acceleration on slider A at this instant will be parallel to OA?

Question 7

The time variation of the position of a particle in rectilinear motion is given by

x = 2t³ + t²+ 2t. If n is the velocity and a the acceleration of the particle in consistent units, the motion started with

Question 8

A slider crank mechanism with crank radius 200 mm and connecting rod length 800 mm is shown. The crank is rotating at 600 rpm in the counter clockwise direction. In the configuration shown, the crank makes an angle of 90 ° with the sliding direction of the slider, and a force of 5 kN is acting on the slider. Neglecting the inertia forces, the turning moment on the crank (in kN-m) is __________

Question 9

A slider crank mechanism is shown in the figure. At some instant, the crank angle is 45^° and a force of 40 N is acting towards the left on the slider. The length of the crank is 30 mm and the connecting rod is 70 mm. Ignoring the effect of gravity, friction and inertial forces, the magnitude of the crankshaft torque (in Nm) needed to keep the mechanism in equilibrium is ________(correct to two decimal places).

Question 10

A slider crank mechanism is rotating with angular velocity of 20 rad/s having crank angle of 60 degree with positive x axis of the slider direction. If the length of the coupler is 100 mm and radius of the crank is 20 mm. Find the angular velocity of the coupler (in rad/s) _____________.

Question 11

A slider-crank mechanism with crank radius 60 mm and connecting rod length 240 mm is shown in figure. The crank is rotating with a uniform angular speed of 10 rad/s, counter clockwise. For the given configuration, the speed (in m/s) of the slider is____

Question 12

The number of degrees of freedom of the linkage shown in the figure is

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ESE & GATE ME Theory of Machines & Vibrations

Mar 1ESE & GATE ME