MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Machine Dynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
For isochronous Hartnell governor |
| A. | mg + S1 / mg + S2 = r1/r2 |
| B. | mg – S1 / mg – S2 = r2/r1 |
| C. | S1/S2 = r1/r2 |
| D. | S2/S1 = r1/r2 |
| Answer» B. mg – S1 / mg – S2 = r2/r1 | |
| 2. |
A very sensitive governor will cause hunting. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
FOR_ISOCHRONOUS_HARTNELL_GOVERNOR?$ |
| A. | mg + S<sub>1</sub> / mg + S<sub>2</sub> = r<sub>1</sub>/r<sub>2</sub> |
| B. | mg – S<sub>1</sub> / mg – S<sub>2</sub> = r<sub>2</sub>/r<sub>1</sub> |
| C. | S<sub>1</sub>/S<sub>2</sub> = r<sub>1</sub>/r<sub>2</sub> |
| D. | S<sub>2</sub>/S<sub>1</sub> = r<sub>1</sub>/r<sub>2</sub> |
| Answer» B. mg ‚Äö√Ñ√∂‚àö√ë‚àö¬® S<sub>1</sub> / mg ‚Äö√Ñ√∂‚àö√ë‚àö¬® S<sub>2</sub> = r<sub>2</sub>/r<sub>1</sub> | |
| 4. |
Effort_of_a_governor_is_the$ |
| A. | mean force exerted at the sleeve for a given percentage change of speed |
| B. | workdone at the sleeve for maximum equilibrium speed |
| C. | mean force exerted at the sleeve for maximum equilibrium speed |
| D. | none of the mentioned |
| Answer» B. workdone at the sleeve for maximum equilibrium speed | |
| 5. |
A very sensitive governor will cause hunting? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
When the speed of the engine fluctuates continuously above and below the mean speed, the governor is said to be |
| A. | stable |
| B. | unstable |
| C. | isochronous |
| D. | hunt |
| Answer» E. | |
| 7. |
In a Hartnell governor, if a spring of greater stiffness is used, then the governor will be |
| A. | less sensitive |
| B. | more sensitive |
| C. | unaffected of sensitivity |
| D. | isochronous |
| Answer» B. more sensitive | |
| 8. |
A Porter governor can not be isochronous. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
A governor is said to be isochronous when range of speed is zero for all radii of rotation of the balls within the working range, neglecting friction. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
When the radius of rotation of balls ______________ as the equilibrium speed increases, the governor is said to be unstable. |
| A. | remains constant |
| B. | decreases |
| C. | increases |
| D. | none of the mentioned |
| Answer» C. increases | |
| 11. |
A governor is said to be stable, if the |
| A. | radius of rotation of balls increases as the equilibrium speed decreases |
| B. | radius of rotation of balls decreases as the equilibrium speed decreases |
| C. | radius of rotation of balls increases as the equilibrium speed increases |
| D. | radius of rotation of balls decreases as the equilibrium speed increases |
| Answer» D. radius of rotation of balls decreases as the equilibrium speed increases | |
| 12. |
Sensitiveness of the governor is defined as the ratio of the |
| A. | mean speed to the maximum equilibrium speed |
| B. | mean speed to the minimum equilibrium speed |
| C. | difference of the maximum and minimum equilibrium speeds to the mean speed |
| D. | sum of the maximum and minimum equilibrium speeds to the mean speed |
| Answer» D. sum of the maximum and minimum equilibrium speeds to the mean speed | |