Correct answer: A. – At the end of each day of driving
Manually operated air-tank drains must be opened at the end of each day of driving. Draining removes accumulated water and compressor oil that can damage the system or freeze in cold weather. Tanks with automatic drain valves expel these materials automatically, although some also permit manual draining.
Source: Oregon Commercial Driver Manual — § 5.1.4, “Air Tank Drains”
Correct answer: B. – Get some sleep
If you are drowsy, sleep before beginning the trip. Caffeine may temporarily increase awareness, but it eventually wears off and should not be relied upon to prevent fatigue. If sleepiness develops while driving, stop at a safe location and rest or take a nap before continuing.
Source: Oregon Commercial Driver Manual — § 2.11.2, “Driver Factors”; § 2.11.5, “Night Driving Procedures”
Correct answer: D. – All of the above
Outside convex mirrors should show all three listed areas. These views help the driver monitor traffic, clearances, students, and the area near the rear tires. Because convex mirrors distort apparent size and distance, they must be properly adjusted and used with the bus’s other mirrors.
Source: Oregon Commercial Driver Manual — § 10.1.4, “Outside Left and Right Side Convex Mirrors”
Correct answer: C. – A first aid kit
The Oregon manual’s general equipment list includes a properly rated fire extinguisher, spare electrical fuses unless circuit breakers are used, and approved warning devices. A first aid kit is not one of those general categories. Federal equipment requirements specify extinguisher ratings and acceptable warning-device options.
Source: Oregon Commercial Driver Manual — § 2.1.3, “Emergency Equipment”, 49 CFR § 393.95 – Emergency equipment on all power units
Correct answer: D. – A thin, clear layer of ice over the roadway
Black ice is a thin layer of ice that is clear enough for the pavement beneath it to remain visible. This can make the road appear wet rather than frozen. When temperatures are below freezing and the roadway looks wet, a driver should watch for black ice and reduced traction.
Source: Oregon Commercial Driver Manual — § 2.6.2, “Black Ice”
Correct answer: A. – Whenever their use is safe and legal
High beams should be used when they improve visibility without violating lighting rules or blinding others. In Oregon, a driver must avoid projecting glare toward an oncoming vehicle within 500 feet and must use low beams when following within 350 feet, except while overtaking or passing. Never respond to another driver’s bright lights by creating additional glare.
Source: Oregon Commercial Driver Manual — § 2.11.5, “Night Driving Procedures”, ORS 811.515(6) – When lights must be displayed; kind of light; number; direction; use on certain vehicles
