The maximum permissible level of occupational exposure to radiation is...per year -
Ans. is 'a' i.e., 5 Rad The amount of radiation received from outer space and background radiation has been estimated to be 0.1 rad a year. Apparently, this does not at present constitute a hazard. The additional permissible dose from man made sources should not exceed 5 rad a year.
5 rad
2 rad.
10 rad
50 rad