Related Questions

The velocity of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by (where $$\omega $$ = Angular velocity of the cam shaft)
A $$\omega \left( {{{\text{r}}_1}{{\text{r}}_2}} \right)\sin \theta $$
B $$\omega \left( {{{\text{r}}_1} + {{\text{r}}_2}} \right)\sin \theta \sec 2\theta $$
C $$\omega \left( {{{\text{r}}_1}{{\text{r}}_2}} \right)\cos \theta $$
D $$\omega \left( {{{\text{r}}_1} + {{\text{r}}_2}} \right)\cos \theta \,{\text{cosec2}}\theta $$
The period during which the cam follower remains at rest, when cam moves, is known as
A Constant period
B Fixed period
C Dwell period
D Idle period
The acceleration of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by
A $${\omega ^2}{\text{R}}\cos \theta $$
B $${\omega ^2}\left( {{\text{R}} - {{\text{r}}_1}} \right)\cos \theta $$
C $${\omega ^2}\left( {{\text{R}} - {{\text{r}}_1}} \right)\sin \theta $$
D $${\omega ^2}{{\text{r}}_1}\sin \theta $$
The acceleration of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by
A $${\omega ^2}\left( {{{\text{r}}_1}{{\text{r}}_2}} \right)\left( {1 - {{\cos }^2}\theta } \right)$$
B $${\omega ^2}\left( {{{\text{r}}_1} + {{\text{r}}_2}} \right)\left( {1 + {{\cos }^2}\theta } \right)$$
C $${\omega ^2}\left( {{{\text{r}}_1} + {{\text{r}}_2}} \right)\left( {\frac{{2 - {{\cos }^2}\theta }}{{{{\cos }^3}\theta }}} \right)$$
D $${\omega ^2}\left( {{{\text{r}}_1} - {{\text{r}}_2}} \right)\left( {1 - {{\sin }^2}\theta } \right)$$
In a circular arc cam with roller follower, the acceleration in any position of the lift will depend only upon
A Total lift, total angle of lift, minimum radius of cam and cam speed
B Radius of circular arc, cam speed, location of centre of circular arc and roller diameter
C Mass of cam follower linkage, spring stiffness and cam speed
D Total lift, centre of gravity of the cam and cam speed
In a cam drive with uniform velocity follower, the sharp corners of the displacement diagram are rounded off at the beginning and at the end of each stroke. This is done
A Because of difficulty in manufacturing cam profile
B Because of loose contact of follower with cam surface
C In order to have acceleration in beginning and retardation at the end of stroke within the finite limits
D Because the uniform velocity motion is a partial parabolic motion
The difference between CAD and CAM is that CAD software is directed at product design while CAM software is:
A concerned with production and control of tool design
B concerned with management programs
C designed for communications
D specifically for PC-board design
E None of the above
For low and moderate speed engines, the cam follower should move with
A uniform velocity
B simple harmonic motion
C uniform acceleration and retardation
D cycloidal motion
The cam and follower is an example of
A sliding pair
B rolling pair
C lower pair
D higher pair
The pressure angle of a cam is the angle between the direction of the follower motion and a normal to the
A Pitch circle
B Base circle
C Pitch curve
D Prime circle

Next steps