MCQOPTIONS
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MCQOPTIONS
This section includes 34 Mcqs, each offering curated multiple-choice questions to sharpen your Machine Design knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In hypoid bevel gears, shafts may continue past each other. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
When two hyperboloids are rotated, the resulting motion is |
| A. | Sliding |
| B. | Turning |
| C. | Combination of turning and sliding |
| D. | Rotary |
| Answer» D. Rotary | |
| 3. |
Hypoid gears are based on surfaces that are paraboloids of revolution. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
Which of the following are characteristics of skew bevel gears? |
| A. | Straight teeth |
| B. | Mounted on parallel shafts |
| C. | Mounted on intersecting shafts |
| D. | All of the mentioned |
| Answer» B. Mounted on parallel shafts | |
| 5. |
Crown gears having a pitch angle of 90⁰ are mounted on shafts intersecting at an angle |
| A. | 90 |
| B. | <90 |
| C. | >90 |
| D. | None of the listed |
| Answer» D. None of the listed | |
| 6. |
When the pitch angle is greater than 90⁰, it is called external bevel gear. |
| A. | True |
| B. | Internal |
| C. | Helical |
| D. | Herringbone |
| Answer» C. Helical | |
| 7. |
The gear ratio of bevel gears = tan yg = cot yp. True or false? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
A pair of bevel gears is mounted on two intersecting shafts who have a shaft angle of 80°. The gear ratio of the gears is 1/3. Find the pitch angles. |
| A. | 62.76°, 17.24° |
| B. | 49.31°, 30.69° |
| C. | 56.97°, 23.03° |
| D. | 64.63°, 15.37° |
| Answer» B. 49.31°, 30.69° | |
| 9. |
A pair of bevel gears is mounted on two intersecting shafts who have a shaft angle of 70°. The velocity ratio of the gears is 2. Find the pitch angles. |
| A. | 42.21°, 27.79° |
| B. | 48.14°, 21.86° |
| C. | 39.29°, 30.71° |
| D. | 46.95°, 23.05° |
| Answer» C. 39.29°, 30.71° | |
| 10. |
Identify the given gear. |
| A. | Spur |
| B. | Helical |
| C. | Worm |
| D. | Bevel |
| Answer» E. | |
| 11. |
Bevel gears are used to have a gear drive between two intersecting shafts. True or false? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
A_PAIR_OF_BEVEL_GEARS_IS_MOUNTED_ON_TWO_INTERSECTING_SHAFTS_WHO_HAVE_A_SHAFT_ANGLE_OF_80¬¨ àû._THE_GEAR_RATIO_OF_THE_GEARS_IS_1/3._FIND_THE_PITCH_ANGLES.?$# |
| A. | 62.76°, 17.24° |
| B. | 49.31°, 30.69° |
| C. | 56.97°, 23.03° |
| D. | 64.63°, 15.37° |
| Answer» B. 49.31¬¨¬®‚Äö√†√ª, 30.69¬¨¬®‚Äö√†√ª | |
| 13. |
WHICH_OF_THE_FOLLOWING_ARE_CHARACTERISTICS_OF_SKEW_BEVEL_GEARS??$ |
| A. | Straight teeth |
| B. | Mounted on parallel shafts |
| C. | Mounted on intersecting shafts |
| D. | All of the mentioned |
| Answer» B. Mounted on parallel shafts | |
| 14. |
When two hyperboloids are rotated, the resulting motion is$ |
| A. | Sliding |
| B. | Turning |
| C. | Combination of turning and sliding |
| D. | Rotary |
| Answer» D. Rotary | |
| 15. |
The_gear_ratio_of_bevel_gears_=_tan_yg_=_cot_yp._True_or_false?$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 16. |
Hypoid_gears_are_based_on_surfaces_that_are_paraboloids_of_revolution.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 17. |
Zerol gears give lesser contact ratio. |
| A. | True |
| B. | No, larger contact ratio |
| C. | Zero contact |
| D. | None of the listed |
| Answer» C. Zero contact | |
| 18. |
Zerol gears are straight bevel gears with zero spiral angle. |
| A. | True |
| B. | False |
| Answer» C. | |
| 19. |
Hypoid gears have the following characteristics. |
| A. | Curved teeth |
| B. | Mounted on non -parallel non intersecting shafts |
| C. | Efficiency of 97% |
| D. | All of the mentioned |
| Answer» E. | |
| 20. |
In_hypoid_bevel_gears,_shafts_may_continue_past_each_other. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 21. |
A pair of bevel gears is mounted on two intersecting shafts who have a shaft angle of 70°. The velocity ratio of the gears is 2. Find the pitch angles?# |
| A. | 42.21°, 27.79° |
| B. | 48.14°, 21.86° |
| C. | 39.29°, 30.71° |
| D. | 46.95°, 23.05° |
| Answer» C. 39.29¬¨¬®‚Äö√†√ª, 30.71¬¨¬®‚Äö√†√ª | |
| 22. |
Crown gears having a pitch angle of 90‚Äö√Ö‚àû are mounted on shafts intersecting at an angl?# |
| A. | =90 |
| B. | <90 |
| C. | >90 |
| D. | None of the listed |
| Answer» D. None of the listed | |
| 23. |
What is the working depth of the gear and the pinion of the bevel gears? |
| A. | 2 m, 0.7 m |
| B. | 0.7 m, 2 m |
| C. | 3 m, 0.4 m |
| D. | 0.4 m, 3 m |
| Answer» B. 0.7 m, 2 m | |
| 24. |
Miter gears are the bevel gears mounted on shaft which are intersecting at angle greater than 90. |
| A. | True |
| B. | False |
| Answer» C. | |
| 25. |
Which of the gears has the highest contact ratio? |
| A. | Helical |
| B. | Spur |
| C. | Bevel |
| D. | Worm |
| Answer» D. Worm | |
| 26. |
If pitch angle is >90, the bevel gear is? |
| A. | Internal |
| B. | External |
| C. | Crown |
| D. | Static |
| Answer» B. External | |
| 27. |
What is the formula to calculate the pitch angle of pinion of a bevel gear using the angular velocity? |
| A. | y<sub>p</sub> = tan<sup>-1</sup> ((cos θ)/((w<sub>g</sub>/w<sub>p</sub>)+sin θ)) |
| B. | y<sub>p</sub> = tan<sup>-1</sup> ((cos θ)/((w<sub>p</sub>/w<sub>g</sub>)+sin θ)) |
| C. | y<sub>p</sub> = tan<sup>-1</sup> ((sin θ)/((w<sub>g</sub>/w<sub>p</sub>)+cos θ)) |
| D. | y<sub>p</sub> = tan<sup>-1</sup> ((sin θ)/((w<sub>p</sub>/w<sub>g</sub>)+cos θ)) |
| Answer» E. | |
| 28. |
For crown bevel gear, pitch angle is |
| A. | <90 |
| B. | =90 |
| C. | >90 |
| D. | None of the listed |
| Answer» C. >90 | |
| 29. |
What is the formula to calculate the pitch angle of gear of a bevel gear using the radius? |
| A. | y<sub>g</sub> = tan<sup>-1</sup> ((cos θ)/((r<sub>g</sub>/r<sub>p</sub>)+sin θ)) |
| B. | y<sub>g</sub> = tan<sup>-1</sup> ((cos θ)/((r<sub>p</sub>/r<sub>g</sub>)+sin θ)) |
| C. | y<sub>g</sub> = tan<sup>-1</sup> ((sin θ)/((r<sub>p</sub>/r<sub>g</sub>)+cos θ)) |
| D. | y<sub>g</sub> = tan<sup>-1</sup> ((sin θ)/((r<sub>g</sub>/r<sub>p</sub>)+cos θ)) |
| Answer» D. y<sub>g</sub> = tan<sup>-1</sup> ((sin ‚âà√≠‚Äö√†√®)/((r<sub>g</sub>/r<sub>p</sub>)+cos ‚âà√≠‚Äö√†√®)) | |
| 30. |
When the pitch angle is greater than 90‚Äö√Ö‚àû, it is called external bevel gear.$ |
| A. | True |
| B. | Internal |
| C. | Helical |
| D. | Herringbone |
| Answer» C. Helical | |
| 31. |
Which of the following creates smoother motion? |
| A. | Straight bevel gears |
| B. | Spiral bevel gears |
| C. | Equal for straight and spiral |
| D. | None of the mentioned |
| Answer» C. Equal for straight and spiral | |
| 32. |
Bevel gears are equivalent to rolling ________ |
| A. | cubes |
| B. | cones |
| C. | spheres |
| D. | cuboids |
| Answer» C. spheres | |
| 33. |
Straight bevel gears are easy to design and manufacture and give reasonably good service with quieter operation. |
| A. | True |
| B. | No, noise problem |
| C. | No, vibration problem |
| D. | None of the listed |
| Answer» C. No, vibration problem | |
| 34. |
There are ____ common types of bevel gears. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |