ASNT Industrial Radiography Radiation Safety Practice Test

What does full deflection of a survey meter during a battery check indicate?

1. The meter is functioning properly

2. The meter may or may not be working properly

3. The meter requires calibration

4. The battery needs replacement

The correct answer is: The meter may or may not be working properly

During a battery check, if a survey meter shows full deflection, it suggests that the meter has a power supply capable of driving the needle or digital readout to its maximum reading. However, full deflection by itself does not definitively confirm that the meter is functioning properly; it may be influenced by factors such as the condition of the detector or internal components. Thus, while full deflection indicates that the battery is providing power to the meter, it does not guarantee accurate or reliable readings if other parts of the meter are malfunctioning. Therefore, the indication that the meter "may or may not be working properly" reflects the uncertainty and need for further evaluation or testing to confirm its functional state. In contrast, indications that might suggest a meter is functioning properly would require consistent readings or calibration checks. Likewise, calibration needs or battery replacements are specific situations that would have distinct indications rather than a solitary full deflection reading during a check.