What equipment is commonly used to measure a driver's BAC?

What equipment is commonly used to measure a driver's BAC?

• A. Speedometer
• B. Blinking light tool
• C. Breathalyzer
• D. Tachometer

Answer: (C)

The breathalyzer is the equipment commonly used to measure a driver's blood alcohol concentration (BAC). This device estimates the level of alcohol in a person's breath, which correlates to the BAC in their bloodstream. When a driver is suspected of driving under the influence, law enforcement officials often administer a breath test using a breathalyzer during traffic stops. The accuracy and efficiency of breathalyzers make them a standard tool in DUI investigations, as they provide immediate results that aid officers in determining whether a driver is impaired. In contrast, the other options listed serve different purposes. A speedometer measures the speed of the vehicle, a blinking light tool assists in signaling or directing traffic, and a tachometer gauges the engine's revolutions per minute (RPM). None of these instruments relate to assessing alcohol consumption, which is why they are not suitable for measuring BAC.

The breathalyzer is the equipment commonly used to measure a driver's blood alcohol concentration (BAC). This device estimates the level of alcohol in a person's breath, which correlates to the BAC in their bloodstream. When a driver is suspected of driving under the influence, law enforcement officials often administer a breath test using a breathalyzer during traffic stops. The accuracy and efficiency of breathalyzers make them a standard tool in DUI investigations, as they provide immediate results that aid officers in determining whether a driver is impaired.

In contrast, the other options listed serve different purposes. A speedometer measures the speed of the vehicle, a blinking light tool assists in signaling or directing traffic, and a tachometer gauges the engine's revolutions per minute (RPM). None of these instruments relate to assessing alcohol consumption, which is why they are not suitable for measuring BAC.