Which of the following is NOT one of the five basic parameters of a grinding wheel?

The answer is correct because the five basic parameters of a grinding wheel typically include bonding material, wheel structure, grit size, wheel shape, and the type of abrasive used.

While the diameter of the wheel is indeed an important specification of a grinding wheel, it is not classified as one of the basic parameters that fundamentally define the characteristics and performance of the grinding wheel. The other parameters, such as bonding material, define how the abrasives are held together, wheel structure relates to the distribution of the abrasives, grit size indicates the size of the individual particles, and the type of abrasive determines the cutting properties.

Focusing on these five parameters helps in selecting the right grinding wheel for specific applications, whereas the diameter, although necessary for compatibility and fitment, pertains more to the wheel’s physical dimensions rather than its grinding performance characteristics.