# Manufacturing Engineering Questions & Answers – Gear Basics-2

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This set of Manufacturing Science Question Bank focuses on “Gear Basics-2”

1. Which of the following is not a standard pressure angle in degree?
a) 20
b) 25
c) 14.5
d) 19

Explanation: 19 degree is not a standard pressure angle.

2. Distance between the points of contact of two mating teeth from the beginning of engagement to the end of engagement is known as
a) Arc of contact
b) Path of contact
c) Path of approach
d) Path of recess

Explanation: Path of contact is the distance between the points of contact of two mating teeth from the beginning of engagement to the end of engagement.

3. Path of contact from the beginning of engagement to the pitch point is known as
a) Arc of contact
b) Path of contact
c) Path of approach
d) Path of recess

Explanation: Path of approach is equal to path of contact from the beginning of the engagement to the pitch point.

4. Portion of path of contact from the pitch point to end of engagement is known as
a) Arc of contact
b) Path of contact
c) Path of approach
d) Path of recess

Explanation: Path of recess is the portion of path of contact from the pitch point to end of the engagement.

5. Circumferential distance between points from the beginning to the end of engagement of two mating gear on pitch circle is known as
a) Arc of contact
b) Path of contact
c) Path of approach
d) Path of recess

Explanation: Arc of contact is the circumferential distance between points from the beginning to the end of engagement of two mating gear on pitch circle.

6. Portion of arc of contact from the beginning of the engagement to the pitch point is known as
a) Contact ratio
b) Angle of friction
c) Arc of recess
d) Arc of approach

Explanation: Arc of approach is the portion of arc of contact from the beginning of the engagement to the pitch point.

7. Portion of arc of contact from the pitch point to the end of engagement is known as
a) Contact ratio
b) Angle of friction
c) Arc of recess
d) Arc of approach

Explanation: Arc of recess is the portion of arc of contact from the pitch point to the end of the engagement.

8. Angle subtended by arc of contact at the centre of pitch circle is known as
a) Contact ratio
b) Angle of action
c) Arc of recess
d) Arc of approach

Explanation: Angle of action is the angle subtended by arc of contact at the centre of pitch circle.

9. Number of teeth in contact is given by
a) Arc of contact
b) Path of contact
c) Contact ratio
d) Path of recess

Explanation: Contact ratio is the number of teeth in contact of two mating gear.

10. Contact ratio is given by
a) Angle of action/pitch angle
b) Angle of action*pitch angle
c) Angle of action-pitch angle
d) Angle of action +pitch angle

Explanation: Contact ratio = Angle of action/pitch angle.

11. Which of the following is a standard pressure angle in degree?
a) 20
b) 21
c) 13.5
d) 19

Explanation: 20 degree is a standard pressure angle.

12. Which of the following is a standard pressure angle in degree?
a) 24
b) 21
c) 14.5
d) 19

Explanation: 14.5 degree is a standard pressure angle.

13. Which of the following is a standard pressure angle in degree?
a) 25
b) 21
c) 13.5
d) 19

Explanation: 25 degree is a standard pressure angle.

14. Distance between the points of contact of two mating teeth from the beginning of engagement to the end of engagement is known as
a) Arc of contact
b) Contact length
c) Path of approach
d) Path of recess

Explanation: Path of contact is the distance between the points of contact of two mating teeth from the beginning of engagement to the end of an engagement. Path of contact is also known as contact length.

15. For a given pair of mating gear, angle of action is 19 degree and pitch angle is 4 degree. Contact ratio is equal to
a) 3.20
b) 2.13
c) 4.75
d) 6.32 