MCQOPTIONS
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MCQOPTIONS
This section includes 21 Mcqs, each offering curated multiple-choice questions to sharpen your Theory Machines knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The pressure angle of two gears in a mesh is φ = 25°. The number of teeth on the pinion is 45 and the gear ratio is 2. The module is 6 mm and addendum = 1.1 module. Find the contact ratio of these two gears. |
| A. | 1.7 |
| B. | 2.3 |
| C. | 4.2 |
| D. | 3.5 |
| Answer» B. 2.3 | |
| 2. |
The pressure angle of two gears in a mesh is φ = 22.5°. The number of teeth on the pinion is 25 and the gear ratio is 2. The module is 7 mm and addendum = 1 module. Find the angle of action of these two gears. |
| A. | 32.056° |
| B. | 34.697° |
| C. | 22.72° |
| D. | 28.531° |
| Answer» D. 28.531° | |
| 3. |
Two involute gears in a mesh have a module of 10 mm and the pressure angle is 35°. The larger gear has 45 teeth whereas the pinion has 15 teeth. The addendum is equal to one module. Find the arc of contact. |
| A. | 36. 832 mm |
| B. | 32.460 mm |
| C. | 39.626 mm |
| D. | 27.239 mm |
| Answer» D. 27.239 mm | |
| 4. |
The path of approach = 13.92 mm and path of recess = 11.56 mm. The pressure angle is 22.5°. The module is 4 mm. Find the contact ratio of these two gears. |
| A. | 2.19 |
| B. | 3.54 |
| C. | 3.12 |
| D. | 2.53 |
| Answer» B. 3.54 | |
| 5. |
The path of contact of two gears in a mesh is 50 mm and the pressure angle is 45°. The module is 8 mm. Find the contact ratio of these two gears. |
| A. | 4.2 |
| B. | 1.9 |
| C. | 3.7 |
| D. | 2.8 |
| Answer» E. | |
| 6. |
Two involute gear have a module of 5 mm, the arc of contact is 25 mm. Find the contact ratio of these two gears. |
| A. | 5 |
| B. | 1.59 |
| C. | 0.2 |
| D. | 3 |
| Answer» C. 0.2 | |
| 7. |
Two gears in a mesh have the arc of contact = 27 mm. The pressure angle is 15°. Find the path of contact. |
| A. | 104.32 mm |
| B. | 6.98 mm |
| C. | 27.95 mm |
| D. | 26.08 mm |
| Answer» E. | |
| 8. |
Two involute gears have path of contact 40 mm and the pressure angle is 50°. Find the arc of contact. |
| A. | 62.23 mm |
| B. | 25.71 mm |
| C. | 30.64 mm |
| D. | 52.21 mm |
| Answer» B. 25.71 mm | |
| 9. |
THE_PATH_OF_CONTACT_OF_TWO_GEARS_IN_A_MESH_IS_50_MM_AND_THE_PRESSURE_ANGLE_IS_45¬¨ àû._THE_MODULE_IS_8_MM._FIND_THE_CONTACT_RATIO_OF_THESE_TWO_GEARS.?$# |
| A. | 4.2 |
| B. | 1.9 |
| C. | 3.7 |
| D. | 2.8 |
| Answer» E. | |
| 10. |
Two involute gears in a mesh have a module of 10 mm and the pressure angle is 35°. The larger gear has 45 teeth whereas the pinion has 15 teeth. The addendum is equal to one module. Find the arc of contact.$# |
| A. | 36. 832 mm |
| B. | 32.460 mm |
| C. | 39.626 mm |
| D. | 27.239 mm |
| Answer» D. 27.239 mm | |
| 11. |
The_path_of_approach_=_13.92_mm_and_path_of_recess_=_11.56_mm._The_pressure_angle_is_22.5°._The_module_is_4_mm._Find_the_contact_ratio_of_these_two_gears.$# |
| A. | 2.19 |
| B. | 3.54 |
| C. | 3.12 |
| D. | 2.53 |
| Answer» B. 3.54 | |
| 12. |
The pressure angle of two gears in a mesh is φ = 25°. The number of teeth on the pinion is 45 and the gear ratio is 2. The module is 6 mm and addendum = 1.1 module. Find the contact ratio of these two gears.$ |
| A. | 1.7 |
| B. | 2.3 |
| C. | 4.2 |
| D. | 3.5 |
| Answer» B. 2.3 | |
| 13. |
The_pressure_angle_of_two_gears_in_a_mesh_is_φ_=_22.5°._The_number_of_teeth_on_the_pinion_is_25_and_the_gear_ratio_is_2._The_module_is_7_mm_and_addendum_=_1_module._Find_the_angle_of_action_of_these_two_gears.$ |
| A. | 32.056° |
| B. | 34.697° |
| C. | 22.72° |
| D. | 28.531° |
| Answer» D. 28.531¬¨¬®‚Äö√†√ª | |
| 14. |
Two involute gear have a module of 5 mm, the arc of contact is 25 mm. Find the contact ratio of these two gears? |
| A. | 5 |
| B. | 1.59 |
| C. | 0.2 |
| D. | 3 |
| Answer» C. 0.2 | |
| 15. |
Two involute gears in a mesh have a circular pitch of 25 mm. The arc of contact is 55 mm. Find the number of pairs of teeth in contact. |
| A. | 2.2 |
| B. | 0.45 |
| C. | 13.75 |
| D. | 1.3 |
| Answer» B. 0.45 | |
| 16. |
Two gears in a mesh have the arc of contact = 27 mm. The pressure angle is 15°. Find the path of contact.$ |
| A. | 104.32 mm |
| B. | 6.98 mm |
| C. | 27.95 mm |
| D. | 26.08 mm |
| Answer» E. | |
| 17. |
Two involute gears have path of contact 40 mm and the pressure angle is 50°. Find the arc of contact.$ |
| A. | 62.23 mm |
| B. | 25.71 mm |
| C. | 30.64 mm |
| D. | 52.21 mm |
| Answer» B. 25.71 mm | |
| 18. |
For continuous transmission of motion, the contact ratio i.e. n must always be _______ |
| A. | equal to 1 |
| B. | equal to 0 |
| C. | more than unity |
| D. | less than unity |
| Answer» D. less than unity | |
| 19. |
If the contact ratio is 2.7, two pairs of teeth are always in contact and three pairs of teeth are in contact for _________ % of the time. |
| A. | 100 |
| B. | 50 |
| C. | 45 |
| D. | 70 |
| Answer» E. | |
| 20. |
The contact ratio is the ratio of arc of contact to the ____________ |
| A. | circular pitch |
| B. | dedendum |
| C. | circular pitch |
| D. | module |
| Answer» D. module | |
| 21. |
The distance travelled by a point on either pitch circle of the two wheels during the period of contact of a pair of teeth is called ____________________ |
| A. | path of contact |
| B. | arc of contact |
| C. | contact ratio |
| D. | angle of action |
| Answer» C. contact ratio | |