CDL Air Brakes 한국어 모의고사 2026
Free CDL Air Brakes practice — required to drive vehicles with air brakes (nearly all trucks). Real test is in English; native-language explanations + English-term glossary. ~25 questions on the real test, 80% to pass. 모든 문제를 무료로 연습하고 25문항 모의고사를 실제 합격선 80%로 채점하세요.
🚛 CDL 운행 전 점검 — 단계별
단계별 운행 전 점검 체크리스트 — 7단계 방법, 엔진, 일주 점검, 캡 내 에어 브레이크 점검과 자동 탈락 항목 →
🎯 주제별 연습
Air Brake System Parts
The parts of an air brake system and how they work: air compressor, governor, air tanks and drains, alcohol evaporator, safety valve, brake pedal, foundation brakes (s-cam, wedge, disc), supply and application pressure gauges, low air pressure warning, stop light switch, front brake limiting valve, spring brakes, parking brake controls, and ABS.
Dual Air Brake Systems
Dual air brake systems: two separate air brake systems (primary and secondary) operated by one set of controls, each with its own tanks and lines; building pressure before driving, the low-air-pressure warning, and what happens when one system fails.
Inspecting Air Brakes
The air-brake-specific parts of the seven-step inspection: checking the air compressor belt and slack adjusters, brake drums, linings and hoses, and the Step 7 final air brake check — low-air warning, spring-brake auto-apply, pressure build-up rate, static air-leakage-rate test, governor cut-in/cut-out, and parking- and service-brake tests.
Using Air Brakes
Using air brakes in normal and emergency driving: smooth normal stops, brake lag / air lag (~½ second), total stopping distance with brake-lag added, controlled and stab braking, emergency stops, responding to a low-air-pressure warning, and proper parking-brake use.
Antilock Braking Systems (ABS)
Antilock braking systems (ABS) on air-brake vehicles: what ABS is, the yellow malfunction lamps on tractors/trucks/buses and on trailers, how to tell if a vehicle is equipped, and how to brake correctly — ABS is an addition to your normal brakes, so brake normally and don't pump.
Downhill Braking & Brake Fade
Braking on long, steep downgrades and brake fade: what causes fade (excessive heat from overusing the service brakes instead of engine braking), how brakes overheat and lose friction, why a safe speed and low gear must be selected before the grade, and the proper snub-braking technique down a long downgrade.
📚 이 시험 학습 가이드
🧰 이 자격증으로 할 수 있는 일
일자리 보기 →🧭 이 길의 다음 단계 — 신규 이민자 커리어 경로
이 시험이 미국 면허·자격 사다리에서 어디에 속하는지 확인하세요 — 중위 급여와 각 실제 시험의 응시 언어 포함 →
📋 준비물
- ✓
Proof of identity & U.S. residency
Documents required vary by state — check your state DMV's CDL page.
- ✓
Social Security number
- ✓
DOT medical certificate (for the CDL/CLP)
Most CDL applicants must be medically certified; bring your med card.
📅 예약 방법
- 1
Study the CDL manual
Use your state's CDL manual (AAMVA model) for General Knowledge, Air Brakes and Combination Vehicles.
- 2
Apply for a Commercial Learner's Permit (CLP)
Pass the required knowledge tests at your state DMV to get the CLP, then practice before the skills test.
- 3
Check your state's specifics
Test languages, fees, scheduling (appointment vs walk-in) and retake rules vary by state — see the per-state table on this page.
💡 시험 당일 팁
- •Required to drive any vehicle with air brakes (nearly all trucks). Failing it adds a 'no air brakes' restriction to your CDL.
- •Know the load-bearing numbers: low-air warning at/below 60 psi; governor cut-out ~120–140 psi; spring brakes apply when air is lost.
🔗 공식 자료
FMCSA — Commercial Driver's License ↗
Federal CDL overview, classes, endorsements, and English-language-proficiency rules.
AAMVA — CDL Testing ↗
The model CDL manual & testing system that state CDL manuals are based on.
Find your state's CDL manual & test info ↗
Languages, fees, scheduling and pass rules vary by state — see your state DMV (and our per-state table).
❓ 자주 묻는 질문
CDL Air Brakes 시험은 몇 문항이며 몇 개를 맞혀야 합격하나요?
CDL Air Brakes 필기시험은 25문항이며 20개(80%)를 맞혀야 합격합니다.
CDL Air Brakes 시험에서 몇 개까지 틀려도 되나요?
25문항 중 최대 5개까지 틀려도 합격합니다.
CDL Air Brakes 시험에 무엇을 가져가야 하나요?
Proof of identity & U.S. residency — Documents required vary by state — check your state DMV's CDL page. Social Security number DOT medical certificate (for the CDL/CLP) — Most CDL applicants must be medically certified; bring your med card.
CDL Air Brakes 시험은 어떻게 예약하고 보나요?
1. Study the CDL manual: Use your state's CDL manual (AAMVA model) for General Knowledge, Air Brakes and Combination Vehicles. 2. Apply for a Commercial Learner's Permit (CLP): Pass the required knowledge tests at your state DMV to get the CLP, then practice before the skills test. 3. Check your state's specifics: Test languages, fees, scheduling (appointment vs walk-in) and retake rules vary by state — see the per-state table on this page.