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Which one of the following pairs is not correctly matched?
- a)Positive drive .... Belt drive
- b)High velocity ratio .... Worm gearing
- c)To connect non-parallel and non- intersecting shafts .... Spiral gearing.
- d)Diminished noise and smooth operation .... Helical gears.
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
Which one of the following pairs is not correctly matched?a)Positive d...
Explanation:
The correct answer is option 'A' - Positive drive and Belt drive.
Positive Drive:
A positive drive is a type of power transmission mechanism where there is a direct mechanical connection between the driving and driven components. In a positive drive system, there is no slipping or relative motion between the driver and driven components.
Belt Drive:
A belt drive is a type of power transmission mechanism where a belt is used to transmit power from the driving to the driven component. In a belt drive system, power is transmitted through friction between the belt and the pulleys.
Why Option 'A' is Incorrect:
The pair of positive drive and belt drive is not correctly matched because a belt drive is not a positive drive system. In a belt drive, there is a possibility of slipping between the belt and the pulleys, which can result in a loss of power transmission efficiency. On the other hand, a positive drive system ensures a direct mechanical connection with no slipping, providing more reliable power transmission.
Correctly Matched Pairs:
The other pairs mentioned in the question are correctly matched:
High Velocity Ratio and Worm Gearing:
Worm gearing is known for its high velocity ratio. It is a type of power transmission mechanism where a worm gear is used to transmit power between two non-parallel and non-intersecting shafts. The high helix angle of the worm gear allows for a large velocity ratio.
To Connect Non-Parallel and Non-Intersecting Shafts and Spiral Gearing:
Spiral gearing is used to connect non-parallel and non-intersecting shafts. It consists of helical gears with curved teeth that allow for smooth and efficient power transmission between shafts at different angles.
Diminished Noise and Smooth Operation and Helical Gears:
Helical gears are known for their diminished noise and smooth operation. The helical teeth of these gears engage gradually, reducing noise and vibration compared to spur gears. They provide smoother and quieter power transmission.
In Conclusion:
The pair of positive drive and belt drive is not correctly matched. The other pairs, high velocity ratio and worm gearing, to connect non-parallel and non-intersecting shafts and spiral gearing, and diminished noise and smooth operation and helical gears, are correctly matched.
The correct answer is option 'A' - Positive drive and Belt drive.
Positive Drive:
A positive drive is a type of power transmission mechanism where there is a direct mechanical connection between the driving and driven components. In a positive drive system, there is no slipping or relative motion between the driver and driven components.
Belt Drive:
A belt drive is a type of power transmission mechanism where a belt is used to transmit power from the driving to the driven component. In a belt drive system, power is transmitted through friction between the belt and the pulleys.
Why Option 'A' is Incorrect:
The pair of positive drive and belt drive is not correctly matched because a belt drive is not a positive drive system. In a belt drive, there is a possibility of slipping between the belt and the pulleys, which can result in a loss of power transmission efficiency. On the other hand, a positive drive system ensures a direct mechanical connection with no slipping, providing more reliable power transmission.
Correctly Matched Pairs:
The other pairs mentioned in the question are correctly matched:
High Velocity Ratio and Worm Gearing:
Worm gearing is known for its high velocity ratio. It is a type of power transmission mechanism where a worm gear is used to transmit power between two non-parallel and non-intersecting shafts. The high helix angle of the worm gear allows for a large velocity ratio.
To Connect Non-Parallel and Non-Intersecting Shafts and Spiral Gearing:
Spiral gearing is used to connect non-parallel and non-intersecting shafts. It consists of helical gears with curved teeth that allow for smooth and efficient power transmission between shafts at different angles.
Diminished Noise and Smooth Operation and Helical Gears:
Helical gears are known for their diminished noise and smooth operation. The helical teeth of these gears engage gradually, reducing noise and vibration compared to spur gears. They provide smoother and quieter power transmission.
In Conclusion:
The pair of positive drive and belt drive is not correctly matched. The other pairs, high velocity ratio and worm gearing, to connect non-parallel and non-intersecting shafts and spiral gearing, and diminished noise and smooth operation and helical gears, are correctly matched.
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Which one of the following pairs is not correctly matched?a)Positive drive .... Belt driveb)High velocity ratio .... Worm gearingc)To connect non-parallel and non- intersecting shafts .... Spiral gearing.d)Diminished noise and smooth operation .... Helical gears.Correct answer is option 'A'. Can you explain this answer?
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