MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your General Awareness knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Calculate the shaft angle for same hand of helix if helix angle of two gears are 20⁰ and 17⁰. |
| A. | 17⁰ |
| B. | 20⁰ |
| C. | 37⁰ |
| D. | 3⁰ |
| Answer» D. 3⁰ | |
| 2. |
A herringbone speed reducer consist of 20 teeth pinion driving a 100 teeth gear. The normal module of gear is 2mm. The face width of each half is 30mm and Lewis factor is 0.4. If permissible bending stress is 500N/mm², then calculate the beam strength. |
| A. | 15000N |
| B. | 12000N |
| C. | 8000N |
| D. | 10000N |
| Answer» C. 8000N | |
| 3. |
Which of the following is herringbone gear? |
| A. | Left one |
| B. | Right one |
| C. | Both |
| D. | None |
| Answer» B. Right one | |
| 4. |
A pair of helical gears consist of 25 teeth pinion gear meshing with a 90 teeth gear. Calculate the tangential force If surface hardness is 260BHN. Also face width=35mm, module=4mm and helix angle=25⁰. The velocity of operation is 3.5m/s and service factor 1.5. |
| A. | 1136.5N |
| B. | 3983.7 |
| C. | 2012.6N |
| D. | 3226.5N |
| Answer» C. 2012.6N | |
| 5. |
A pair of helical gears consist of 25 teeth pinion gear meshing with a 90 teeth gear. Calculate the wear strength If surface hardness is 260BHN. Also face width=35mm, module=4mm and helix angle=25⁰. |
| A. | 443.5N |
| B. | 1125.6N |
| C. | 7971.9N |
| D. | 1014.2N |
| Answer» D. 1014.2N | |