1
GATE ME 2007
+2
-0.6
A quick return mechanism is shown in below. The crank OS is drive at $$2$$ rev/s in counter clockwise direction

If the quick return ratio is $$1:2$$, then the length of the crank in mm is

A
$$250$$
B
$$250\sqrt 3$$
C
$$500$$
D
$$500\sqrt 3$$
2
GATE ME 2007
+2
-0.6
The input link Q2P of a four bar linkage is rotated at $$2$$ rad/s counter clockwise direction as shown below. The angular velocity of the coupler PQ in rad/s, at an instant when $$\angle {O_4}{O_2}P = {180^ \circ },$$ is
A
$$4$$
B
$$2\sqrt 2$$
C
$$1$$
D
$${1 \over {\sqrt 2 }}$$
3
GATE ME 2007
+2
-0.6
A quick return mechanism is shown in below. The crank OS is drive at $$2$$ rev/s in counter clockwise direction

The angular speed of PQ in rev/s when the block R attains maximum speed during forward stroke (stroke with slower speed) is

A
$$1/3$$
B
$$2/3$$
C
$$2$$
D
$$3$$
4
GATE ME 2006
+2
-0.6
Match the items in column $$I$$ and $$II$$

List $$I$$
$$P.$$ Higher kinematic pair
$$Q.$$ Lower kinematic pair
$$R.$$ Quick return mechanism
$$S.$$ Mobility of a linkage

List $$II$$
$$1.$$ Grubler's equation
$$2.$$ Line contact
$$3.$$ Euler's equation
$$4.$$ planar
$$5.$$ Shaper
$$6.$$ Surface contact

A
$$P = 2,Q = 6,R = 4,S = 3$$
B
$$P = 6,Q = 2,R = 4,S = 1$$
C
$$P = 6,Q = 2,R = 5,S = 3$$
D
$$P = 2,Q = 6,R = 5,S = 1$$
GATE ME Subjects
EXAM MAP
Medical
NEET