A truck whose electrical circuits are protected by fuses must carry which set of emergency equipment?
- Spare fuses, a first-aid kit and one reflective warning triangle
- A fire extinguisher, a spare tire and a set of jumper cables
- Three reflective triangles, tire chains and a tow strap or chain
- Spare fuses, three reflective triangles and a fire extinguisher
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D. Spare fuses, three reflective triangles and a fire extinguisher
The required items are spare electrical fuses (unless the vehicle uses circuit breakers), warning devices for a parked vehicle such as three reflective triangles, and a properly charged and rated fire extinguisher. A first-aid kit, spare tire or chains may be useful but are not the required set.
Reference: CDL Manual Section 2.1, Vehicle Inspection; 49 CFR 393.95
Steering wheel free play is a defect when it exceeds about how many degrees?
- 5 degrees
- 10 degrees
- 20 degrees
- 30 degrees
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B. 10 degrees
More than 10 degrees of play, roughly 2 inches of movement at the rim of a 20-inch steering wheel, can make the vehicle hard to steer. Waiting until play reaches 20 or 30 degrees leaves far too much looseness in the system.
Reference: CDL Manual Section 2.1, Vehicle Inspection
On your walkaround you notice streaks of rust running outward from several lug nuts on one wheel. What does this most likely mean?
- The lug nuts may be loose
- The tire is overinflated
- The wheel was painted recently
- The hub has too much oil
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A. The lug nuts may be loose
Rust trails around wheel nuts are a sign the nuts have been working loose, so their tightness must be checked. An overfilled or leaking hub shows up as oil or grease on the wheel, not rust around the nuts.
Reference: CDL Manual Section 2.1, Vehicle Inspection