MCQOPTIONS
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MCQOPTIONS
This section includes 5 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. |
It is required to lift water at the top of a high building at the rate of 50 litres/min. Assuming the losses due to friction equivalent to 5 m and those due to leakage equal to 5 m head of water, efficiency of pump 90%, decide the kilowatt capacity of motor required todrive the pump. |
| A. | 0.102 kW |
| B. | 0.202 kW |
| C. | 0.302 kW |
| D. | 0.402 kW |
| Answer» D. 0.402 kW | |
| 2. |
A centrifugal Watt governor is fitted with two balls, each of mass 2.5 kg. Find the sped of the governor, when the balls fall by 20 mm. |
| A. | 60 r.p.m. |
| B. | 70 r.p.m. |
| C. | 70.2 r.p.m. |
| D. | 80 r.p.m. |
| Answer» D. 80 r.p.m. | |
| 3. |
A centrifugal Watt governor is fitted with two balls, each of mass 2.5 kg. Find the sped of the governor, when the balls rise by 20 mm. |
| A. | 80.2 r.p.m. |
| B. | 90.2 r.p.m. |
| C. | 100.2 r.p.m. |
| D. | 110.2 r.p.m. |
| Answer» B. 90.2 r.p.m. | |
| 4. |
A centrifugal Watt governor is fitted with two balls, each of mass 2.5 kg. Find the height of the governor, when it is running at 75 r.p.m. |
| A. | 139 mm |
| B. | 149 mm |
| C. | 159 mm |
| D. | 169 mm |
| Answer» D. 169 mm | |
| 5. |
A governor is said to be isochronous when the equilibrium speed is |
| A. | variable for different radii of rotation of governor balls |
| B. | constant for all radii of rotation of the balls within the working range |
| C. | constant for particular radii of rotation of governor balls |
| D. | constant for only one radius of rotation of governor balls |
| Answer» C. constant for particular radii of rotation of governor balls | |