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Which one of the following statements is correct?                          
While designing a parallel sunk key it is assumed that the distribution of force along the length of the key 
  • a)
    Varies linearly  
  • b)
    is uniform throughout
  • c)
    varies exponentially, being more at the torque input end
  • d)
    varies exponentially, being less at torque output end 
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Which one of the following statements is correct? While de...
Parallel sunk key. The parallel sunk keys may be of rectangular or square section uniform in width and thickness throughout. It may be noted that a parallel key is a taperless and is used where the pulley, gear or other mating piece is required to slide along the shaft. In designing a key, forces due to fit of the key are neglected and it is assumed that the distribution of forces along the length of key is uniform. 
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Most Upvoted Answer
Which one of the following statements is correct? While de...
Explanation:

Parallel sunk keys are used to transmit torque between a shaft and a hub. While designing a parallel sunk key, it is assumed that the distribution of force along the length of the key varies exponentially, being more at the torque input end.

Reason:

The torque input end of the parallel sunk key experiences the maximum amount of torque, which gradually decreases towards the output end. Therefore, the force distribution along the length of the key is not uniform. It follows an exponential distribution with the highest force at the input end and a lower force towards the output end.

Importance:

Understanding the force distribution along the length of the key is crucial for designing the key to withstand the maximum torque input. If the force distribution is assumed to be uniform, the key may fail due to excessive stress at the input end.

Conclusion:

In conclusion, while designing a parallel sunk key, it is important to consider the exponential distribution of force along the length of the key, with the highest force at the input end and lower force towards the output end. This will ensure the key is designed to withstand the maximum torque input without failing due to excessive stress.
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Which one of the following statements is correct? While designing a parallel sunk key it is assumed that the distribution of force along the length of the keya)Varies linearly b)is uniform throughoutc)varies exponentially, being more at the torque input endd)varies exponentially, being less at torque output endCorrect answer is option 'C'. Can you explain this answer? for Mechanical Engineering 2025 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Which one of the following statements is correct? While designing a parallel sunk key it is assumed that the distribution of force along the length of the keya)Varies linearly b)is uniform throughoutc)varies exponentially, being more at the torque input endd)varies exponentially, being less at torque output endCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following statements is correct? While designing a parallel sunk key it is assumed that the distribution of force along the length of the keya)Varies linearly b)is uniform throughoutc)varies exponentially, being more at the torque input endd)varies exponentially, being less at torque output endCorrect answer is option 'C'. Can you explain this answer?.
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