North Carolina Basic Law Enforcement Training (BLET) State Practice Exam

How many samples should be taken in a chemical analysis breath test?

1. 1

2. 2

3. 3

4. 4

The correct answer is: 2

In a chemical analysis breath test, taking two samples is essential for ensuring the accuracy and reliability of the results. The first sample serves as an initial measurement of the individual's blood alcohol concentration. The second sample acts as a verification step. By comparing these two results, any discrepancies can be assessed, which is crucial for confirming that the test is reliable and that the equipment is functioning correctly. Having two samples helps to account for variations that may occur from factors such as user error, equipment calibration issues, or other environmental influences. This practice reinforces the integrity of the testing process and is standard procedure in law enforcement to uphold the legal and procedural standards necessary for accurate breath testing outcomes.