Pre-Trip Defects Before the Road Test
It is your CDL skills test at a Kansas testing site. You are assigned a 72-passenger conventional school bus with air brakes and a 10-speed manual transmission. During the pre-trip inspection you find four things. The ABS malfunction lamp stays on after the ignition bulb check. The left rear brake chamber pushrod extends 2.5 inches when the brakes are applied; the chamber decal lists a 2-inch adjustment limit. The right front tire has a 2-inch cut that exposes cord. Air pressure builds from 85 to 100 psi in 65 seconds. The engine starts, the brake pedal feels firm, and the bus moves in the lot. You have waited six weeks for this appointment, and the examiner asks, 'Are you ready to begin the road test?'
1. Evaluate each finding. Which ones would keep the bus out of service, and why?
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All four findings are defects that should keep this bus from the road test. An ABS lamp that stays on after the bulb check means the ABS is not working. A pushrod extending 2.5 inches when the decal limit is 2 inches means the brake is out of adjustment. A 2-inch cut exposing cord is a tire failure risk and cannot be accepted. An air buildup from 85 to 100 psi in 65 seconds fails the 45-second requirement, so the air system is not supplying pressure fast enough. A firm pedal does not cancel any of these findings. The inspection is not a formality: the point is to catch exactly these conditions before the bus carries students or an examiner.
2. What do you say to the examiner, and what should happen to your test?
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Tell the examiner each defect plainly and decline to take that bus on the road test. Ask whether another bus is available; if not, ask to reschedule. Do not sign or imply that the bus passed inspection, and do not let the six-week wait push you into accepting a known unsafe vehicle. The examiner may reject the vehicle or stop the test, but your obligation is the same: the bus must be repaired and re-inspected before it is used. Document the defects for the carrier or school district. The judgment being tested is whether you can separate schedule pressure from the pre-trip standard, and the answer is that the standard controls.
3. On the road test in a different bus, the low-air warning buzzer sounds at 70 psi and the pressure is still falling. What is your immediate action?
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Stop safely as soon as you can, before the pressure drops further. Signal, check mirrors, and move off the traveled lane if possible; do not try to finish the maneuver or continue the test. Tell the examiner that the low-air warning has activated and pressure is falling, and secure the bus. A low-air condition can reduce braking ability, and continuing would be unsafe. Do not pump the brakes repeatedly or ignore the warning because the test is almost over. After stopping, document the condition and do not move the bus until the air system is repaired and rechecked. The road test is not more important than controlling a known brake-system failure.