As per international norms, the maximum permissible value of noise level in the industrial environment is __________ decibels as measured at a distance of 1.5 metres from the source of noise.

ANS:B - 85

As per international norms and standards, the maximum permissible value of noise level in the industrial environment varies depending on the country and specific regulations. However, a commonly cited threshold is around 85 decibels (dB) for an 8-hour exposure period. Therefore, the correct option is: 85 decibels