# Machine Kinematics Questions and Answers – Gearing

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This set of Machine Kinematics Multiple Choice Questions & Answers (MCQs) focuses on “Gearing”.

1. Radial distance between the pitch circle and the top of the tooth is known as
a) pitch
c) base circle
d) none of the mentioned

Explanation: The circle from which an involute curve is generated is known as base circle.
Radial distance between the pitch circle and the top of the tooth is known as addendum.

2. The circle from which an involute curve is generated is known as
a) pitch
c) base circle
d) none of the mentioned

Explanation: The circle from which an involute curve is generated is known as base circle.
Radial distance between the pitch circle and the top of the tooth is known as addendum.

3. Length of the arc of the pitch circle between the centres or other corresponding points of adjacent teeth is known as
a) pitch
b) circular pitch
c) base circle
d) none of the mentioned

Explanation: Length of the arc of the pitch circle between the centres or other corresponding points of adjacent teeth is known as circular pitch.
The circle from which an involute curve is generated is known as base circle.
Radial distance between the pitch circle and the top of the tooth is known as addendum.

4. The curve formed by the point on a circle as it rolls along a straight line is known as
a) cycloid
c) base circle
d) none of the mentioned

Explanation: Length of the arc of the pitch circle between the centres or other corresponding points of adjacent teeth is known as circular pitch.
The circle from which an involute curve is generated is known as base circle.
The curve formed by the point on a circle as it rolls along a straight line is known as cycloid.

5. That surface of the tooth which is between the pitch circle and the top of the tooth is known as
a) cycloid
c) face of tooth
d) none of the mentioned

Explanation: The circle from which an involute curve is generated is known as base circle.
The curve formed by the point on a circle as it rolls along a straight line is known as cycloid.
That surface of the tooth which is between the pitch circle and the top of the tooth is known as face of tooth.

6. The distance between similar, equally spaced tooth surfaces, in a given direction and along a given curve or line is known as
a) pitch
c) base circle
d) none of the mentioned

Explanation: The curve formed by the point on a circle as it rolls along a straight line is known as cycloid.
That surface of the tooth which is between the pitch circle and the top of the tooth is known as face of tooth.
The distance between similar, equally spaced tooth surfaces, in a given direction and along a given curve or line is known as pitch.

7. The angle between a tooth profile and a radial line at its pitch point is known as
a) pressure angle
b) dedendum angle
c) spiral angle
d) none of the mentioned

Explanation: The angle subtended at the centre of a base circle from the origin of an involute to the point of tangency of the generatrix from any point on the same involute is known as roll angle.
The angle between a tooth profile and a radial line at its pitch point is known as pressure angle.

8. The angle subtended at the centre of a base circle from the origin of an involute to the point of tangency of the generatrix from any point on the same involute is known as
a) pressure angle
b) dedendum angle
c) roll angle
d) none of the mentioned

Explanation: The angle subtended at the centre of a base circle from the origin of an involute to the point of tangency of the generatrix from any point on the same involute is known as roll angle.
The angle between a tooth profile and a radial line at its pitch point is known as pressure angle.

9. Surface of the gear between the fillets of adjacent teeth is known as
a) cycloid
c) bottom land
d) none of the mentioned

Explanation: Surface of the gear between the fillets of adjacent teeth is known as bottom land.

10. The angle, at the base cylinder of an involute gear, that the tooth makes with the gear axis is known as
a) pressure angle
b) base helix angle
c) roll angle
d) none of the mentioned

Explanation: The angle subtended at the centre of a base circle from the origin of an involute to the point of tangency of the generatrix from any point on the same involute is known as roll angle.
The angle between a tooth profile and a radial line at its pitch point is known as pressure angle.
The angle, at the base cylinder of an involute gear, that the tooth makes with the gear axis is known as base helix angle.

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