During weekly linac checks, a trainee notes three readings: the plan's prescribed target dose, a reading taken outside the vault with an ionization survey meter that reports exposure, and the monthly badge result from the dosimetry service. The physicist also asks for a reminder about air kerma. Which statement correctly matches each reading to its quantity and unit?

Each reading describes a different physical quantity, and the unit tells you which one you are holding: gray measures energy absorbed per unit mass in the material, sievert carries a radiation or quality weighting for risk, and coulomb per kilogram measures ionization produced in air. The plan's prescribed target dose is absorbed dose, so it belongs in gray; the survey meter integrates ionization in air, which is exposure expressed in coulomb per kilogram; and the badge reports a weighted quantity for the worker, so sievert is the correct family. Reporting effective dose in gray drops the weighting factor that gives the number meaning; assigning sieverts to the meter reading imports a radiation weighting the instrument never applied; and labeling the plan dose as dose equivalent implies a conversion occurred when the calculation stayed in absorbed dose. Exam caveat: air kerma is also reported in gray, so the unit alone will not separate it from absorbed dose, and the stated quantity must do that. Practical check: name the quantity first, then confirm the unit matches it before comparing numbers.