Correct answer: D – All of the above
The California commercial driver guidance recommends all three behaviors. A driver can reduce aggression by allowing for others’ mistakes, slowing down, and maintaining reasonable following space. Cautious, courteous conduct also helps keep frustration from turning into unsafe driving.
Source: California Commercial Driver Handbook — § 2.10.2, “Do Not Be an Aggressive Driver”
Correct answer: B – 35 mph
Driving with the traffic flow reduces the need to pass or create unnecessary speed differences. Here, 35 mph is below the posted limit and matches surrounding traffic. The driver must still reduce speed further if traction, visibility, curves, or other conditions make 35 mph unsafe.
Source: California Commercial Driver Handbook — § 2.6.2, “Matching Speed to the Road Surface”
Correct answer: D – Release the accelerator
Release the accelerator to let the vehicle slow and help the tires regain contact with the road. Do not use the brakes to slow a hydroplaning vehicle. If the vehicle has a manual transmission, depressing the clutch also allows the wheels to turn freely.
Source: California Commercial Driver Handbook — § 2.6.2, “Hydroplaning”
Correct answer: D – One-fourth or more
A vehicle will be placed out of service when one-fourth or more of the leaves in a leaf spring are missing or broken. Broken or shifted leaves below that threshold may still create a serious hazard. Suspension defects should be identified during the vehicle inspection and corrected before operation.
Source: California Commercial Driver Handbook — § 2.1.3, “Suspension System Defects”
Correct answer: A – The distance traveled after recognizing a hazard but before physically applying the brakes
Reaction distance is the distance the vehicle continues traveling before the driver physically applies the brakes in response to a recognized hazard. Perception distance ends when the brain recognizes the hazard. Perception, reaction, and braking distances together make up total stopping distance.
Source: California Commercial Driver Handbook — § 2.6.1, “Stopping Distance”
Correct answer: C – A yellow ABS malfunction lamp on the instrument panel
ABS-equipped tractors, trucks, and buses have a yellow ABS malfunction lamp on the instrument panel. On newer vehicles, the lamp normally illuminates during the startup bulb check and then goes out. A lamp that remains on after the check may indicate that ABS control has been lost.
Source: California Commercial Driver Handbook — § 2.18.3, “How to Know if Your Vehicle Is Equipped With ABS”
