Ontario G1 Practice Test · Question
In Ontario, an Approved Screening Device (ASD) measures:
An Approved Screening Device is a roadside tool used by police to measure breath alcohol concentration to determine if a driver is over the legal limit or in th
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Question: In Ontario, an Approved Screening Device (ASD) measures:
Answer options:
- Speed
- Tire pressure ✅ Breath alcohol concentration
- Drug levels in urine
Correct answer: Breath alcohol concentration
Explanation: An Approved Screening Device is a roadside tool used by police to measure breath alcohol concentration to determine if a driver is over the legal limit or in the warn range. Other options are incorrect because speed is measured by radar, tire pressure by physical gauges, and roadside drug tests utilize oral fluid rather than urine. Under Ontario's Highway Traffic Act, refusing to provide a breath sample into an Approved Screening Device carries immediate and severe penalties. For the G1 exam, understanding this device's function is crucial, as questions regarding alcohol limits and roadside testing procedures are a staple of Ontario's traffic law section.
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Question explanations
- What does an inverted (upside-down) red and white triangle mean?
- A yellow diamond-shaped sign is used to indicate what?
- What does a circular sign with a red border and diagonal line through a black 'P' indicate?
- You are driving in Edmonton and see a flashing amber light on a school bus. What action must you take?
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