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115.

A cam rotating with uniform angular velocity pushes its flat-faced radial follower upwards. If the nature of the upward displacement of the follower with respect to the angle of cam rotation is cycloidal, then what is the shape of acceleration curve ?

asked in Mechanical Paper-2, 2009

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116.

Why is an offset provided in a radial cams translating follower mechanisms?
(a) To avoid obstruction due to some other machine part
(b) To decrease pressure angle during ascent to the follower
(c) To increase pressure angle during ascent of the follower
(d) To decrease pressure angle during descent of the follower

asked in Mechanical Paper-2, 2009

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117.

The figure as shown below is a rigid body undergoing planar motion. The absolute tangential accelerations of the point R and S on the body are 150 mm/s² and 300 mm/s² respectively in the directions shown. What is the angular acceleration of the rigid body?

(a) 1.66 rad/s²
(b) 3.33 rad/s²
(c) 5.00 rad/s²
(d) 2.50 rad/s²

asked in Mechanical Paper-2, 2009

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118.

A rod of length 1 m is sliding in a corner as shown in the figure. At an instant when the rod makes an angle of 60° with the horizontal plane, the downward velocity of point A is 1 m/s. What is the angular velocity of the rod at this instant?

(a) 2.0 rad/s
(b) 1.5 rad/s
(c) 0.5 rad/s
(d) 0.75 rad/s

asked in Mechanical Paper-2, 2009

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119.

Consider the following:
In a flow chart, terminal symbol indicates
1. beginning
2. ending
3. arithmetic calculations
4. power
Which of these statements is/are correct?
(a) 2 only
(b) 1, 2, 3 and 4
(c) 2, 3 and 4
(d) 1, 2 and 4

asked in Mechanical Paper-2, 2010

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120.

The overall transfer function of a closed-loop automatic control system is equal to 1- 1/S. If the transfer function of feedback path is unity. The transfer function of forward path is
(a) S
(b) S + 1
(c) S - 1
(d) 1 - S

asked in Mechanical Paper-2, 2010

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