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

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

$$\omega \left( {{{\text{r}}_1} + {{\text{r}}_2}} \right)\cos \theta \,{\text{cosec2}}\theta $$

For S.H.M. cam, the acceleration of the follower at the ends of the stroke and aimed stroke respectively, is

A

maximum and zero

B

zero and maximum

C

minimum and maximum

D

zero and minimum

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

This is a curve showing the displacement of the follower as ordinates on a base line that represents one revolution of the cam:

A

Displacement diagram

B

Follower

C

Cam cycle

D

Reciprocation chart

You are about to install a second IDE hard drive in a PC that has only one IDE adapter. Your first hard drive will still be the boot drive. How should the second drive be configured?

A

as a master

B

as a secondary

C

as a slave

D

as a primary

E

as auto-select

The velocity of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by

A

$$\omega {\text{R}}\cos \theta $$

B

$$\omega \left( {{\text{R}} - {{\text{r}}_1}} \right)\cos \theta $$

C

$$\omega \left( {{\text{R}} - {{\text{r}}_1}} \right)\sin \theta $$

D

$$\omega {{\text{r}}_1}\sin \theta $$

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

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

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