Traffic Signs & Signals — Montana

Montana CDL practice test: 435 free practice questions (Based on the official driver handbook). The official format is not yet verified; check the official site before your test. Traffic Signs & Signals: 4 questions. Updated

Regulatory, warning and guide signs, plus traffic light and pavement marking questions.

This topic page is still being reviewed against the official handbook. Until review is finished it is hidden from search engines.

Topic / MetricValue
TopicTraffic Signs & Signals
License testMontana CDL permit (CLP) knowledge tests
Topic questions4 (1% of 435 total)
Review statusThis topic page is still being reviewed against the official handbook. Until review is finished it is hidden from search engines.

Official handbook

Not yet verified State CDL manual (based on the AAMVA model manual) link not yet collected

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Questions (4)

1. A driver should test the tractor protection valve by:
  1. Pulling the yellow, diamond-shaped knob.
  2. Releasing air with the brake pedal. ✓
  3. Unlocking the trailer doors.

Answer: B. Releasing air with the brake pedal.

Official handbook: Official handbook
2. If a traffic light has been green for a long time:
  1. It will probably stay green as you approach.
  2. It is likely broken.
  3. It is likely that the light will soon change to yellow. ✓
  4. It is likely the light will skip yellow and change from green to red.

Answer: C. It is likely that the light will soon change to yellow.

If a traffic light has been green for a long time, expect it to soon change to yellow. The handbook tells drivers to look far ahead and treat a long-lasting green as a sign that the light will probably change before they arrive. It says to start slowing down and be ready to stop. Since the change is expected as you approach, the best match is that yellow is likely coming soon. The manual does not say the light is broken or that it will skip yellow.
Official handbook: Texas Commercial Driver License Handbook (DL-7C), Section 2 – Driving Safely, p. 38
3. What does the trailer air supply control look like?
  1. It is a square blue knob.
  2. It is a triangular yellow knob.
  3. It is an eight-sided red knob. ✓
  4. It is a circular orange knob.

Answer: C. It is an eight-sided red knob.

The trailer air supply control on newer vehicles is a red eight-sided knob. The handbook describes the trailer air supply control in the cab, which operates the tractor protection valve. On newer vehicles it is a red knob with eight sides. You push it in to send air to the trailer and pull it out to cut the air off and apply the trailer emergency brakes. The same knob pops out on its own when air pressure falls to roughly 20 to 45 psi, closing the tractor protection valve. Older vehicles may instead have a lever rather than a knob.
Official handbook: Texas Commercial Driver License Handbook (DL-7C), Section 6 – Combination Vehicles, p. 95
4. One reason for you to sign a previous driver’s vehicle inspection report is if:
  1. The previous driver dated their entry.
  2. Reported defects are certified to have been repaired. ✓
  3. You plan to drive for longer than one hour or travel farther than 50 miles.
  4. The report is left on the dashboard.

Answer: B. Reported defects are certified to have been repaired.

You should sign the previous driver's vehicle inspection report when reported defects are certified to have been repaired. The handbook says that before driving, you review the inspection report made by the previous driver. You sign that report when defects noted earlier have been certified as fixed, or certified as not requiring a fix. Your signature is your certification that those reported defects were taken care of. So the reason to sign is that reported defects are certified as repaired.
Official handbook: Texas Commercial Driver License Handbook (DL-7C), Section 4 – Transporting Passengers Safely, p. 77
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Last checked: 2026-10-17 · Not yet verified

Updated: · Based on the official driver handbook