BAT Result Interpretation & Analysis 2

Question 1

A subject's BrAC result is 0.079 g/210L. Which statement is correct?

Accepted Answer

The result is below the 0.08 per se limit but may still indicate impairment

Answer

0.079 is below the 0.08 g/210L per se limit, but impairment can exist at any BrAC level.

Question 2

What does a 'slope detector' on an evidential breath testing instrument detect?

Accepted Answer

Mouth alcohol rapidly declining during the sample plateau

Answer

The slope detector identifies mouth alcohol by sensing a rapidly falling alcohol concentration that does not plateau during the breath sample.

Question 3

When two sequential breath results differ by more than 0.020 g/210L, the correct action is to:

Accepted Answer

Void the test and conduct a new breath alcohol test sequence

Answer

A difference exceeding 0.020 g/210L between duplicate samples invalidates the test sequence and requires retesting.

Question 4

Which physiological factor can cause a falsely elevated BrAC reading on a breath test?

Accepted Answer

Hypoventilation or breath-holding before the test

Answer

Hypoventilation or breath-holding allows alveolar air to become more concentrated with alcohol, raising the BrAC reading above actual blood alcohol.

Question 5

The Henry's Law partition ratio used in evidential breath testing assumes a blood-to-breath ratio of:

Accepted Answer

2100:1

Answer

Evidential breath testing instruments use a 2100:1 blood-to-breath partition ratio to convert BrAC to an equivalent blood alcohol value.

(BAT) Breath Alcohol Technician Certified Practice Test