Any dose less than 10 rads will be displayed as

• A. N/A
• B. one
• C. zero
• D. ten

Answer: (C)

When a radiation dose display has a least count or minimum displayable value of 10 rads, any actual dose below that threshold isn’t resolved by the instrument. The readout rounds down to zero, so sub-threshold exposures appear as zero. This design keeps the display simple and avoids false alarms from tiny fluctuations, while still signaling that some exposure did occur, just not enough to register as a higher value. So, any dose under 10 rads will be shown as zero. Reading a value of one rad would require finer resolution, while a readout of ten rads would mean the dose reached the display threshold. N/A isn’t used to indicate sub-threshold exposure on a standard readout.