Law Enforcement Traffic Control and DUI 2

Question 1

What is the per se blood alcohol concentration (BAC) limit for non-commercial drivers age 21 and over in all U.S. states?

Accepted Answer

0.08%

Answer

A BAC of 0.08% is the legal per se limit for adult non-commercial drivers in every U.S. state.

Question 2

Which test is most commonly used as a Standardized Field Sobriety Test (SFST) and measures involuntary eye jerking?

Accepted Answer

Horizontal Gaze Nystagmus

Answer

Horizontal Gaze Nystagmus measures the involuntary jerking of the eyes that becomes pronounced under alcohol impairment.

Question 3

Under implied consent laws, what is the typical consequence of refusing a chemical test after a lawful DUI arrest?

Accepted Answer

Administrative license suspension

Answer

Implied consent laws impose an automatic administrative license suspension for refusing a chemical test.

Question 4

When directing traffic at an intersection, what does an officer's raised palm facing a driver mean?

Accepted Answer

Stop

Answer

A raised open palm facing the driver is the universal signal to stop.

Question 5

What is the lower 'zero tolerance' BAC limit commonly applied to drivers under age 21?

Accepted Answer

0.00% to 0.02%

Answer

Zero tolerance laws set the limit for underage drivers at 0.00% to 0.02% depending on the state.

Law Enforcement Practice Test