MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Crowning of a pulley is done to |
| A. | prevent the wear and tear of the belt |
| B. | avoid slipping of the belt |
| C. | enable pulley rigidly fixed to the shaft |
| D. | increase strength of the pulley |
| Answer» C. enable pulley rigidly fixed to the shaft | |
| 2. |
In a multiple V belt drive, when a single belt is damaged, it is preferable to change the complete set to _____. |
| A. | Reduce vibration |
| B. | Reduce slip |
| C. | Ensure uniform loading |
| D. | Ensure proper alignment |
| Answer» D. Ensure proper alignment | |
| 3. |
If the tight and slack side tensions in a flat belt running at 1 km/min are 1500 N and 1000 N, the power transmitted is |
| A. | 15.3 kW |
| B. | 10 kW |
| C. | 8.3 kW |
| D. | None of these |
| Answer» D. None of these | |
| 4. |
If there is no slip and the creep in the transmission, then what is the equation for the velocity ratio in the open belt drive? |
| A. | \(\frac{{{N_1}}}{{{D_1}}} = \frac{{{N_2}}}{{{D_2}}}\) |
| B. | \(\frac{{{N_1}}}{{{D_1}}} = \frac{{{D_2}}}{{{N_2}}}\) |
| C. | \(\frac{{{N_1}}}{{{N_2}}} = \frac{{{D_2}}}{{{D_1}}}\) |
| D. | None of these |
| Answer» D. None of these | |
| 5. |
A shaft is driven with the help of a belt, which is passing over the engine and shaft. The engine is running at 200 rpm. The diameters of engine pulley is 51 cm and that of shaft is 30 cm. The speed of the shaft will be: |
| A. | 200 rpm |
| B. | 300 rpm |
| C. | 340 rpm |
| D. | 400 rpm |
| Answer» D. 400 rpm | |
| 6. |
In V-belt drive, belt touches _____. |
| A. | at bottom |
| B. | at sides only |
| C. | both at bottom and sides |
| D. | could touch anywhere |
| Answer» C. both at bottom and sides | |
| 7. |
In a belt drive, the condition where there is relative motion between the belt and the pulley surface is known as ________. |
| A. | Creep |
| B. | Slip |
| C. | Slack |
| D. | Contact angle |
| Answer» B. Slip | |
| 8. |
An electric motor running at 900 rpm drives a pump at 1500 rpm. If the pulley on the driving shaft is 750 mm in diameter, what is the required size of the pulley on the driven shaft? |
| A. | 1250 mm |
| B. | 450 mm |
| C. | 900 mm |
| D. | None of these |
| Answer» C. 900 mm | |
| 9. |
If the tension in tight side and slack side of the belt is 3000 N and 1500 N, respectively. The effective driving force at the circumference of the driven pulley is given by: |
| A. | 2000 N |
| B. | 1000 N |
| C. | 4500 N |
| D. | 1500 N |
| Answer» E. | |
| 10. |
In a flat belt drive the maximum tension which the belt can be subjected to is T and the mass of the belt per unit length is m kg. The velocity of the belt for maximum power transmission is |
| A. | \(\sqrt {\frac {T}{3m}}\) |
| B. | \(\sqrt {\frac {T}{m}}\) |
| C. | \({\frac {T}{3m}}\) |
| D. | \( {\frac {T}{m}}\) |
| Answer» B. \(\sqrt {\frac {T}{m}}\) | |