California Driver's Permit Diagnostic Quiz

California Driver's Permit Diagnostic Quiz (10 questions). Correct answers and explanations follow each question.

1. 1. A provisional driver uses the medical-need exception to drive during restricted hours. What must the physician's note include?

   1. The medical condition and the date the driver is expected to recover. (correct)
   2. A photo of the driver and the physician's medical license number.
   3. A prescription list and the diagnosing hospital's contact information.

   Why: The physician's note has to state the medical condition and the date the driver is expected to recover. Reaching for C substitutes information that sounds medically formal for the two plain fields the manual actually names.

2. 2. You are taking the DMV knowledge test at a California field office. What testing aids does the manual let you use during the test?

   1. Only a cell phone for timekeeping.
   2. No testing aids at all. (correct)
   3. Only the California Driver's Handbook.

   Why: The manual explicitly bans testing aids during the knowledge test and names the California Driver's Handbook and a cell phone as examples of what you cannot bring in. Choice C misreads the sentence's two examples as items the rule carves out; the sentence is a ban, and those are the two aids drivers most often try to sneak in.

3. 3. A siren and lights appear behind you while you are already in the middle of an intersection. What does the manual tell you to do?

   1. Stop immediately inside the intersection
   2. Speed up through the intersection and keep driving normally
   3. Continue through, then drive to the right and stop when safe (correct)

   Why: If you are already in the intersection when the emergency vehicle appears, the manual says to keep going through and pull to the right after you clear it. The 'keep driving normally' answer tempts drivers who catch the 'continue through' part but drop the follow-up rule to pull over and stop once past the intersection.

4. 4. What does this sign require of a driver turning left when the signal shows a solid green ball?

   

   1. Yield to oncoming traffic before completing the turn. (correct)
   2. Come to a full stop at the line, then turn when clear.
   3. Turn without yielding, because the green ball protects the turn.

   Why: The placard restates the permissive left-turn rule: on a circular green ball, a driver may turn left but must first wait for a safe gap in oncoming traffic. The trap is the choice that treats the green ball as a protected turn, which is what a green arrow does; the placard is posted precisely because the ball does not protect the turn.

5. 5. Under the normal passenger restriction, during the first year a provisional driver may carry passengers under 20 only when accompanied by whom?

   1. A California-licensed driver at least 21 years old.
   2. Any adult family member holding a valid license.
   3. A parent or guardian, or another California-licensed driver at least 25 years old. (correct)

   Why: The manual names two people who can accompany you: a parent or guardian, or another California-licensed driver at least 25 years old. Choice A picks 21, the alcohol-purchase age drivers default to as a general adult-permission threshold when the manual's stricter 25-year floor for minors does not come to mind.

6. 6. What does this crossbuck sign require of a driver approaching the tracks?

   

   1. Yield to any approaching train and cross only when the tracks are clear. (correct)
   2. Come to a complete stop before every crossing, whether or not a train is approaching.
   3. Yield to cross traffic on the road that intersects at this location.

   Why: The crossbuck acts as a yield device at a highway-rail grade crossing: slow down, look and listen both ways, and cross only when no train is coming. The trap is the answer that treats every crossing as a mandatory stop, which carries a stop-sign habit over to a device that only demands a stop when a train is actually there.

7. 7. May a motorcycle legally share a lane with your vehicle in California?

   1. Yes, and the manual calls it lane splitting (correct)
   2. No, motorcycles must always have the full lane
   3. No, unless traffic is fully stopped

   Why: California law makes lane sharing with motorcycles legal, and the manual calls the practice lane splitting. Choice B reflects a driver's instinct to treat one vehicle per lane as an absolute rule; the manual prints both 'give the motorcycle the full lane' and 'lane splitting is legal' in the same section, and only the first is a courtesy.

8. 8. You are entering a California highway from an on-ramp. Who has the right-of-way?

   1. Vehicles on the on-ramp because they are accelerating
   2. Traffic already on the highway (correct)
   3. Whichever vehicle reaches the merge point first

   Why: Traffic already on the highway has the right-of-way over any driver coming up an on-ramp. Momentum reasoning drives A, arguing that a car building speed on the ramp has earned the merge, but the yield duty falls on the entering driver regardless.

9. 9. How many attempts does California allow to pass the original knowledge test before you must reapply?

   1. Two attempts
   2. Three attempts (correct)
   3. Unlimited attempts

   Why: California allows three attempts on the original knowledge test before you must reapply. A test-taker who picks two attempts is usually carrying over a two-tries-and-out rule from a peer or from a state that caps the vision retest at two, rather than reading California's own cap on the knowledge test.

10. 10. What is the correct way to check your blind spots before a lane change?

    1. Turn only your head to look over your shoulder (correct)
    2. Turn your body and head together for a clearer view
    3. Rely on the side and rearview mirrors alone

    Why: To check blind spots, turn only your head and look over your shoulder out the side window; turning the whole upper body drags the steering wheel along and drifts the vehicle out of its lane. Drivers reaching for B pull the wheel with their torso, overcorrecting for what feels like a narrow mirror view.