CHP DUI Detection and Enforcement 2

Question 1

For a driver of a commercial vehicle, the legal BAC limit in California is:

Accepted Answer

0.04%

Answer

California Vehicle Code 23152(d) sets the BAC limit at 0.04% for persons operating a commercial motor vehicle.

Question 2

During the One-Leg Stand (OLS) test, for how many seconds must the suspect hold their foot approximately six inches off the ground?

Accepted Answer

30 seconds

Answer

The standardized OLS test requires the subject to hold the raised foot position for 30 seconds while counting aloud.

Question 3

Nystagmus during the HGN test is characterized by:

Accepted Answer

Involuntary jerking of the eyes

Answer

Horizontal Gaze Nystagmus is the involuntary jerking of the eyes, which becomes more pronounced with alcohol or CNS depressant impairment.

Question 4

Which type of DUI checkpoint is specifically authorized under California law and has been upheld by the California Supreme Court?

Accepted Answer

Sobriety checkpoints with advance notice and neutral criteria

Answer

In Ingersoll v. Palmer (1987), the California Supreme Court upheld sobriety checkpoints that follow specific operational guidelines including advance publicity and neutral selection criteria.

Question 5

Drug Recognition Expert (DRE) evaluations assess impairment from drugs using a protocol of how many steps?

Accepted Answer

12

Answer

The NHTSA-approved DRE protocol consists of 12 steps to systematically determine whether a suspect is drug-impaired and identify the drug category.

(CHP) California Highway Patrol Practice Test

(CHP) California Highway Patrol Practice Test

CHP DUI Detection and Enforcement 2