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    the number of teeth per unit length of the pitch circle diameter is called

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    [Solved] The ratio of the pitch diameter to the number of teeth, in a

    Explanation: Following are some basic gear terminologies used in gear design. Gear Terminologies Meaning Module (m)

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    The ratio of the pitch diameter to the number of teeth, in a gear-drive is termed as

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    MPSC AMVI Official Paper 4: 2005

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    circular pitch gear ratio module none of the above

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    Explanation:

    Following are some basic gear terminologies used in gear design.

    Gear TerminologiesMeaningModule (m)

    It is the ratio of the pitch diameter to the number of teeth.

    m=dT

    where d = pitch diameter and T = number of teeth.

    Circular pitch (p)

    It is the distance measured along the circumference of the pitch circle from a point on one tooth to the corresponding point on the adjacent tooth.

    p=πdT⇒πm

    Diametral pitch (P)

    It is the number of teeth per unit length of the pitch circle diameter.

    P=Td

    Gear ratio (G)

    It is the ratio of the number of teeth on the gear to that on the pinion.

    where T, t = number of teeth and gear and pinion respectively.

    Pitch point

    The point of contact of two pitch circles is known as pitch point.

    Space width (b)

    It is the width of the tooth space along the pitch circle.

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    More Gear Terminologies Questions

    Q1. If the effort gear has 32 teeth and the load gear has 160 teeth, calculate the gear ratio.Q2. A spur gear with pitch circle diameter D has number of teeth T. The module m is defined as -Q3. If the base circle diameter is 49 cm, calculate the circular pitch for a gear with 22 teeth.Q4. Calculate the module (M), addendum (A) working depth (W) of a gear, whose reference pitch has a value of 11 mm. Take π = 22/7.Q5. The product of circular pitch and diametral pitch is equal toQ6. In involute gears, pressure angle isQ7. Backlash in gears isQ8. A spur gear has module of 3 mm and pitch line velocity of 3.14 m/s. The number of teeth on gear is 30. What will be the speed of gear (in rpm)?Q9. The radial distance from the pitch circle to the addendum circle is called:Q10. Consider the following statements regarding gears : 1. The ratio of number of teeth on the gear to that on the pinion is known as gear ratio. 2. The circle passing through the tips of teeth is called dedendum circle. 3. The circle passing through the roots of teeth is called addendum circle. 4. Backlash is the difference between the space width and the tooth thickness along the pitch circle. Which of the above statements are correct ?

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    Q1. Particulars of a spur gear are Gear ratio 10 ∶ 1, distance between centers - 660 mm, pinion transmits 500 kW at 1800 rpm. Involute teeth of standard proportion (addendum = m) with pressure angle of 22.5°. Minimum number of teeth on pinion in order to avoid interference will beQ2. A differential gear in an automobile:Q3. _____ motion is transmitted between the teeth of gears in mesh.Q4. Consider the following statements regarding gears: 1. A cycloid is the locus of a point on the circumference of a circle that rolls without slipping on a fixed straight line. 2. A hypocycloid is the locus of a point on the circumference of a circle that rolls without slipping on the circumference of another circle. 3. An epicycloid is the locus of a point on the circumference of a circle that rolls without slipping inside the circumference of another circle. Which of the above statements is/are correct?Q5. In the following figure, bar X has been given a translational motion in a direction depicted in the image. What will be the direction of the motion of the bar Y due to the motion of the entire gear assembly?

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    Gear Terminology

    This set of Theory of Machines Multiple Choice Questions & Answers (MCQs) focuses on “Gear Terminology”. 1. The smaller and generally the driving gear of a pair of mated gears is called _________ a) pitch b) module c) rack d) pinion 2. The distance measured along the circumference of the pitch circle from a point ... Read more

    Theory of Machines Questions and Answers – Gear Terminology

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    This set of Theory of Machines Multiple Choice Questions & Answers (MCQs) focuses on “Gear Terminology”.

    1. The smaller and generally the driving gear of a pair of mated gears is called _________

    a) pitch b) module c) rack d) pinion View Answer

    2. The distance measured along the circumference of the pitch circle from a point on one tooth to the same point on the adjacent tooth is called ________________

    a) pitch diameter b) circular pitch c) pitch point d) line of centres View Answer

    3. The number of teeth per unit length of the pitch circle diameter is called ________________

    a) diametral pitch b) module c) clearance d) gear ratio View Answer

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    4. The ratio of the number of teeth on the gear to the number of teeth on the pinion is called ______

    a) velocity ratio b) module c) gear ratio d) pitch point View Answer

    5. The ratio of pitch diameter to the number of teeth is called _________

    a) module b) addendum c) dedendum d) backlash View Answer

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    6. The circle passing through the upper tips of the teeth is called _________________

    a) pitch circle b) circular pitch c) dedendum circle d) addendum circle View Answer

    6. The radial height of a tooth above the pitch circle is called ____________

    a) addendum b) dedendum c) rack d) line of centres View Answer advertisement

    7. The circle passing through the roots of the teeth is called ________________

    a) addendum b) addendum circle c) dedendum circle d) rack View Answer

    8. The radial depth of a tooth below the pitch circle is called _______________

    a) dedendum b) addendum c) rack d) line of centres View Answer advertisement

    9. The radial difference between the addendum and the dedendum of the tooth is called _________

    a) clearance b) rack c) line of action d) line of centres View Answer

    10. The locus of the point of contact on two mating teeth from beginning of engagement to end of engagement is known as the _______________

    a) angle of action b) arc of contact c) path of contact d) line of action View Answer

    11. The portion of path of contact from the beginning of contact to the pitch point is called _______

    a) arc of recess b) arc of approach c) path of recess d) path of approach View Answer

    12. The portion of the path of contact from the pitch point to the end of contact is called _________

    a) arc of recess b) arc of approach c) path of recess d) path of approach View Answer

    13. Arc of contact = ___________________ Complete the equation.

    a) Path of contact / cos θ

    b) Path of contact / sin θ

    c) Path of contact x cos θ

    d) Path of contact x sin θ

    View Answer

    14. The locus of a point on the pitch circle from the beginning to end of engagement of two mating gears is called as ___________

    a) Arc of contact b) Path of contact c) Path of approach d) Arc of approach View Answer

    15. The ratio of angle of action to the pitch angle is called ___________

    a) space width b) angle of recess

    c) angle of approach

    d) contact ratio View Answer

    16. The angle turned by the gear from the beginning to the end of engagement of a pair of teeth is called ______________

    a) angle of approach

    b) angle of recess c) angle of action d) angle of contact View Answer

    Sanfoundry Global Education & Learning Series – Theory of Machines.

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