An Involute pinion and gear are in mesh. If both have the same size of addendum, then there will be interference between the

An involute pinion and gear are in mesh. If both have the same size of addendum, then there will be an interference between the

A

tip of the gear tooth and flank of pinion

B

tip of the pinion and flank of gear

C

flanks of both gear and pinion

D

tip of both gear and pinion

In full depth involute system, the smallest number of teeth in a pinion which meshes with rack without interference is

A

12

B

16

C

25

D

32

In a gear having involute teeth, the normal to the involute is a tangent to the

A

pitch circle

B

base circle

C

addendum circle

D

dedendum circle

In a gear, having Involute teeth, the normal to the Involute is a tangent to the

A

Base circle

B

Pitch circle

C

Addendum circle

D

Dedendum circle

A worm gear is used as the pinion for the rack and pinion type of steering gearbox, because it

A

Improves steering comfort when steering wheel is turned to effect small changes in the direction of forward motion

B

Allows the steering wheel to be turned by a greater amount when steering

C

Makes the steering more responsive

D

Reduces the amount of kickback for large steering angles

In helical gears, the right hand helixes on one gear will mesh __________ helixes on the other gear.

A

Right hand

B

Left hand

C

Both A and B

D

None of these

When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel and $$\varphi $$ = Pressure angle)

A

$$\frac{{\left( {{{\text{r}}^2} + {{\text{R}}^2}} \right)\cos \varphi }}{2}$$

B

$$\frac{{\left( {{{\text{r}}^2} + {{\text{R}}^2}} \right)\sin \varphi }}{2}$$

C

$$\frac{{\left( {{\text{r}} + {\text{R}}} \right)\cos \varphi }}{2}$$

D

$$\frac{{\left( {{\text{r}} + {\text{R}}} \right)\sin \varphi }}{2}$$

In which of the following type of gear train the first gear and the last gear are co-axial.

A

Simple gear train

B

Compound gear train

C

Reverted gear train

D

None of the mentioned

For an involute gear, the ratio of base circle radius and pitch circle radius is equal to

A

sinɸ

B

cosɸ

C

secɸ

D

cosecɸ

When the axes of first and last gear are co-axial, then gear train is known as

A

simple gear train

B

compound gear train

C

reverted gear train

D

epicyclic gear train

An Involute pinion and gear are in mesh. If both have the same size of addendum, then there will be interference between the

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