The real Louisiana knowledge test is the DMV exam used for a learner permit. This page contains one fixed 20 question slice of the full free 180 question bank, with an explanation after each answer.
Sample question from test 4
signs
What does a black and white speed limit sign show?
- The maximum legal speed or, where posted, the minimum legal speed
- A recommended speed that may always be exceeded
- The speed required in every weather condition
- The speed permitted only when no other vehicles are present
Answer: The maximum legal speed or, where posted, the minimum legal speed. Black and white speed signs can show a maximum legal speed or a minimum legal speed. A maximum is meant for ideal conditions, so rain, fog, ice, traffic, or poor visibility can require slowing further. The recommendation choice wrongly treats the number as optional, while the all-weather choice ignores the need to adapt. A minimum on a high-speed road is different: traveling below it can create a hazard. Read the sign’s wording and assess conditions together.