Statement (I): In sugarcane crushing rollers, the fit between the cast roll and the forged steel shaft is of interference type. Statement (II): This helps in removing the roll from the shaft whenever not needed.

Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I)

Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I)

Statement (I) is true but Statement (II) is false

Statement (I) is false but Statement (II) is true

Statement (I): In sugarcane crushing rollers, the fit between the cast roll and the forged steel shaft is of interference type. Statement (II): This helps in removing the roll from the shaft whenever not needed. Correct Answer Statement (I) is true but Statement (II) is false

Concept:

Interference Fit: Interference results when the lower limit of the shaft is more than the upper limit of the hole. Interference fits are used when it is desirable for the shaft to be securely held within the hole. Great force is needed to separate the parts and mating parts may get damaged when separated. This usually a shrink fit heavy drive fit and light drive fit. Shrunk on a coupling, Iron tyres, Crank pins form interference fit.

In sugarcane rollers the roll and the shaft makes interference fit, because rollers and the shaft are required to hold rigidly.

In the interference fit the roll and the shaft are held rigidly therefore they do not get removed when it is not needed.

Therefore statement II) is incorrect.

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Feb 20, 2025

Statement (I): In sugarcane crushing rollers, the fit between the cast roll and the forged steel shaft is of interference type. Statement (II): This helps in removing the roll from the shaft whenever not needed.

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