1
GATE ME 2005
+2
-0.6
An instantaneous configuration of a four-bar mechanism, whose plane is horizontal, is shown in the figure below. At this instant, the angular velocity and angular acceleration of link $${Q_2}\,\,A$$ are $$\omega = 8\,\,rad/s$$ and $$\alpha = 0$$, respectively, and the driving torque $$(T)$$ is zero. The link $${Q_2}\,\,A$$ is balanced so that its center of mass falls at $${Q_2}.$$

Which kind of $$4$$-bar mechanism is $${Q_2}AB{O_4}?$$

A
Double-crank mechanism
B
Crank-rocker mechanism
C
Double-rocker mechanism
D
Parallelogram mechanism
2
GATE ME 2005
+2
-0.6
An instantaneous configuration of a four-bar mechanism, whose plane is horizontal, is shown in the figure below. At this instant, the angular velocity and angular acceleration of link $${Q_2}\,\,A$$ are $$\omega = 8\,\,rad/s$$ and $$\alpha = 0$$, respectively, and the driving torque $$(T)$$ is zero. The link $${Q_2}\,\,A$$ is balanced so that its center of mass falls at $${Q_2}.$$

At the same instant, if the component of the force at joint $$A$$ along $$AB$$ is $$30 N,$$ then the magnitude of the joint reaction at $${Q_2}$$.

A
is $$Zero$$
B
is $$30$$ $$N$$
C
is $$78$$ $$N$$
D
cannot be determined from the given data
3
GATE ME 2005
+2
-0.6
An instantaneous configuration of a four-bar mechanism, whose plane is horizontal, is shown in the figure below. At this instant, the angular velocity and angular acceleration of link $${Q_2}\,\,A$$ are $$\omega = 8\,\,rad/s$$ and $$\alpha = 0$$, respectively, and the driving torque $$(T)$$ is zero. The link $${Q_2}\,\,A$$ is balanced so that its center of mass falls at $${Q_2}.$$

At the instant considered, what is the magnitude of the angular velocity of $${O_4}B?$$

A
$$1$$ rad/s
B
$$3$$ rad/s
C
$$8$$ rad/s
D
$$64/3$$ rad/s
4
GATE ME 2004
+2
-0.6
Match the following
Type of Mechanism
$$P.$$ Scott - Russel mechanism
$$Q.$$ Geneva mechanism
$$R.$$ Off-set slider- crank mechanism
$$S.$$ Scotch Yoke mechanism

Motion achieved
$$1.$$ Intermittent motion
$$2.$$ Quick return motion
$$3.$$ Simple harmonic motion
$$4.$$ Straight line motion

A
$$P = 2,Q = 3,R = 1,S = 4$$
B
$$P = 3,Q = 2,R = 4,S = 1$$
C
$$P = 4,Q = 1,R = 2,S = 3$$
D
$$P = 4,Q = 3,R = 1,S = 2$$
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Class 12