Manufacturing Engineering Questions & Answers – Gear Terminology-2

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This set of Manufacturing Science Interview Questions and Answers focuses on “Gear Terminology-2”.

1. Circle passing through the top of the tips of teeth is known as
c) Dedendum
d) Dedendum circle

Explanation: Circle passing through the top of the tips of teeth is known as addendum circle.

2. Height of tooth above pitch circle is known as
c) Dedendum
d) Dedendum circle

Explanation: Addendum is the height of tooth above pitch circle.

3. Addendum of gear is generally taken equal to
a) 1 module
b) 2 module
c) 1.157 module
d) 0.157 module

Explanation: Addendum of gear is generally taken equal to 1 module.
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4. Circle passing through root of teeth is known as
c) Dedendum
d) Dedendum circle

Explanation: Circle passing through the root of teeth is known as dedendum circle.

5. Circle passing through root of teeth is known as
c) Dedendum
d) Root circle

Explanation: Circle passing through the root of teeth is known as root circle.
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6. Radial depth of tooth below pitch circle is known as
c) Dedendum
d) Dedendum circle

Explanation: Dedendum is the radial depth of tooth below pitch circle.

7. Standard value of dedendum is generally taken as
a) 1 module
b) 2 module
c) 1.157 module
d) 0.157 module

Explanation: Dedendum of gear is generally taken equal to 1.157 modules.

8. Radial difference between addendum and dedendum of tooth is known as
a) Clearance
b) Full depth of teeth
c) Working depth of teeth
d) Space width

Explanation: Clearance is the radial difference between addendum and dedendum of tooth.

9. Standard value of clearance is generally taken as
a) 1 module
b) 2 module
c) 1.157 module
d) 0.157 module

Explanation: Clearance of gear is generally taken equal to 0.157 modules.

10. Total radial depth of tooth space is known as
a) Clearance
b) Full depth of teeth
c) Working depth of teeth
d) Space width

Explanation: Total radial depth of tooth space is known as full depth of teeth.

11. Maximum depth to which tooth can penetrate into the tooth space of mating gear is known as
a) Clearance
b) Full depth of teeth
c) Working depth of teeth
d) Space width

Explanation: Maximum depth to which tooth can penetrate into the tooth space of mating gear is known as working depth of teeth.

12. Width of tooth space along the pitch circle is known as
a) Clearance
b) Full depth of teeth
c) Working depth of teeth
d) Space width

Explanation: Space width is the width of tooth space along the pitch circle.

13. Full depth of teeth is equal to

Explanation: Full depth is the sum of addendum and dedendum.

14. Working depth of two mating gear is numerically equal to
a) Sum of addendum of two gears
b) Difference of addendum of two gears
c) Difference of dedendum of two gears
d) Sum of dedendum of two gears

Explanation: Working depth of two mating gear is numerically equal to sum of the addendum of two gears.

15. For a given pair of mating gear, arc of contact is 6mm and a circular pitch is 4 mm. Contact ratio is equal to
a) 3.20
b) 1.50
c) 4.75
d) 6.32

Explanation: Contact ratio = arc of contact/circular pitch.

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