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CDL 考试：车辆检查 题目与答案

我们使用的所有题目，附正确答案、解释和出处。

开始模拟测试 44 道题 · 为什么信任我们

车辆检查

44 道题

  1. #1

    前轮（转向轮）轮胎的胎纹深度必须至少为：

    英文原文: Front (steering) tires must have tread depth of at least:

    1. 2/32英寸
    2. 4/32英寸 (4/32 inch)
    3. 1/32英寸
    4. 8/32英寸

    答案: B. 前轮胎：每条主沟槽至少4/32英寸；其他轮胎：2/32英寸。

    来源: North Dakota CDL Manual (2025-2027), 2.1.3You need at least 4/32-inch tread depth in every major groove on front tires.

  2. #2

    方向盘自由行程超过多少会导致转向困难？

    英文原文: Steering wheel play of more than how much can make it hard to steer?

    1. 2度
    2. 5度
    3. 45度
    4. 10度（直径20英寸的方向盘轮缘上约2英寸） (10 degrees (about 2 inches at the rim of a 20-inch wheel))

    答案: D. 自由行程超过10度会使转向困难。

    来源: North Dakota CDL Manual (2025-2027), 2.1.3

  3. #3

    货物及其固定装置必须在行程的前多少英里内检查？

    英文原文: Cargo and its securing devices must be checked within the first how many miles of a trip?

    1. 50
    2. 5
    3. 150
    4. 500

    答案: A. 在前50英里内检查，之后每3小时或每150英里检查一次，并在每次休息后检查。

    来源: Michigan CDL Manual (2022), 3.1

  4. #4

    首次检查后，应多久重新检查一次货物固定情况？

    英文原文: After the first check, cargo securement should be rechecked:

    1. 只在一天结束时
    2. 每500英里
    3. 每3小时或每150英里，以先到者为准 (Every 3 hours or 150 miles, whichever comes first)
    4. 如果货物已封装，则无需检查

    答案: C. 每3小时或每150英里重新检查，并在每次休息后检查。

    来源: Michigan CDL Manual (2022), 3.1After you have driven for 3 hours or 150 miles.

  5. #5

    CDL手册中的标准出车前检查方法有几个步骤？

    英文原文: How many steps are in the standard pre-trip inspection method in the CDL manual?

    1. 三个
    2. 七个 (Seven)
    3. 十个
    4. 十二个

    答案: B. 七步法：整体检查、发动机舱、驾驶室、灯光、绕车检查、信号灯、制动检查。

    来源: North Dakota CDL Manual (2025-2027), 2.1.5

  6. #6

    检查液压制动是否泄漏时，先踩踏板三次，然后用力踩住五秒钟。踏板应该：

    英文原文: To test hydraulic brakes for leaks, pump the pedal three times, then hold firm pressure for five seconds. The pedal should:

    1. 慢慢沉到底
    2. 来回弹动
    3. 下沉约一英寸
    4. 不动 (Not move)

    答案: D. 如果踏板移动，可能有泄漏——驾驶前必须修好。

    来源: North Dakota CDL Manual (2025-2027), 2.1.5The pedal should not move.

  7. #7

    出车前检查时，测试行车制动的方法是：

    英文原文: To test the service brake during the pre-trip inspection, you should:

    1. 以约5英里/小时行驶，用力踩下制动踏板 (Go about 5 mph and push the brake pedal firmly)
    2. 以公路速度猛踩制动
    3. 拉上驻车制动并踩油门
    4. 以30英里/小时连续点踩制动

    答案: A. 以约5英里/小时用力停车时，车辆不应偏向一侧，制动也不应有延迟。

    来源: North Dakota CDL Manual (2025-2027), 2.1.5

  8. #8

    车辆停下时，您必须携带哪种警示装置？

    英文原文: Which warning devices must you carry for a stopped vehicle?

    1. 两面旗子
    2. 一支信号焰火
    3. 三个反光警示三角牌 (Three reflective warning triangles)
    4. 六个锥筒

    答案: C. 应急设备包括三个反光警示三角牌、一个灭火器和备用保险丝（如需要）。

    来源: North Dakota CDL Manual (2025-2027), 2.1.3

  9. #9

    如果联邦或州检查员认定您的车辆不安全，会怎样？

    英文原文: What happens if a federal or state inspector judges your vehicle to be unsafe?

    1. 车辆会被判“停运”（out of service），直到修好为止 (It is put “out of service” until it is fixed)
    2. 可以降低车速继续行程
    3. 可以完成本次行程，但须在一周内修理
    4. 罚款后，司机在报告上签字即可放行

    答案: A. 不安全的车辆会被判停运，修好之前不得上路。

    来源: North Dakota CDL Manual (AAMVA model), Section 2, p. 29If they judge the vehicle to be unsafe, they will put it “out of service” until it is fixed.

  10. #10

    车轮螺母周围有锈迹可能表示：

    英文原文: Rust around the wheel nuts may mean that:

    1. 轮毂轴承需要加润滑脂
    2. 螺母松动 (the nuts are loose)
    3. 轮胎气压过高
    4. 轮辋曾被焊接修理

    答案: B. 螺母周围的锈迹可能说明螺母松了，应检查紧固程度。

    来源: North Dakota CDL Manual (AAMVA model), Section 2, p. 30Rust around wheel nuts may mean the nuts are loose—check tightness.

  11. #11

    钢板弹簧缺少多大比例的叶片时，车辆会被判“停运”？

    英文原文: If what portion of the leaves in a leaf spring are missing, the vehicle is put “out of service”?

    1. 十分之一或更多
    2. 二分之一或更多
    3. 四分之一或更多 (One-fourth or more)
    4. 四分之三或更多

    答案: C. 叶片缺失是严重缺陷；缺少四分之一或更多时车辆会被判停运。

    来源: North Dakota CDL Manual (AAMVA model), Section 2, p. 30If onefourth or more are missing, it will put the vehicle “out of service,” but any defect could be dangerous.

  12. #12

    除前轮外，其他轮胎的最小胎纹深度是多少？

    英文原文: What is the minimum tread depth required on tires other than the front tires?

    1. 2/32英寸 (2/32 inch)
    2. 1/32英寸
    3. 3/32英寸
    4. 4/32英寸

    答案: A. 前轮每条主沟槽至少需要4/32英寸，其他轮胎需要2/32英寸。

    来源: North Dakota CDL Manual (AAMVA model), Section 2, p. 29You need 2/32 inch on other tires.

  13. #13

    排气系统损坏为什么危险？

    英文原文: Why is a broken exhaust system dangerous?

    1. 它会导致制动衰减并使发动机熄火
    2. 有毒废气可能进入驾驶室或卧铺舱 (It can let poison fumes into the cab or sleeper berth)
    3. 它会使方向盘松动且难以转动
    4. 它会使电瓶过充并损坏发电机

    答案: B. 排气系统破损或漏气会让有毒废气进入驾驶室或卧铺舱。

    来源: North Dakota CDL Manual (AAMVA model), Section 2, p. 31A broken exhaust system can let poison fumes into the cab or sleeper berth.

  14. #14

    检查时应注意下列哪种轮胎问题？

    英文原文: Which of these tire problems should you look for during an inspection?

    1. 同一车轴上使用相同尺寸的轮胎
    2. 带气门帽的气门嘴
    3. 子午线轮胎和斜交轮胎混用 (Radial and bias-ply tires used together)
    4. 轮胎气压正确

    答案: C. 子午线轮胎与斜交轮胎混用被列为轮胎问题。

    来源: North Dakota CDL Manual (AAMVA model), Section 2, p. 29Radial and bias-ply tires used together.

  15. #15

    发动机启动后，气压应在多长时间内从50 psi升到90 psi？

    英文原文: After starting the engine, air pressure should build from 50 to 90 psi within:

    1. 一分钟内
    2. 五分钟内
    3. 十分钟内
    4. 三分钟内 (three minutes)

    答案: D. 气压从50 psi升至90 psi正常不应超过三分钟。

    来源: North Dakota CDL Manual (AAMVA model), Section 2, p. 32Pressure should build from 50 to 90 psi within three minutes.

  16. #16

    出车前检查时，发动机启动后仪表板上的ABS灯一直亮着，这表示什么？

    英文原文: During the pre-trip, the ABS light on the dash stays on after the engine starts. What does this mean?

    1. ABS工作不正常 (The ABS is not working properly)
    2. ABS工作正常
    3. 制动液不足
    4. 驻车制动仍然拉着

    答案: A. ABS灯应先亮后灭；如果一直亮着，说明ABS工作不正常。

    来源: North Dakota CDL Manual (AAMVA model), Section 2, p. 32Light on dash should come on and then turn off. If it stays on, the ABS is not working properly.

  17. #17

    挂车上，ABS故障警示灯如果一直亮着，应在哪里观察？

    英文原文: On a trailer, where is the ABS warning light that indicates a malfunction if it stays on?

    1. 挂车右前方的红灯
    2. 挂车左后方的黄灯 (Yellow light on the left rear of the trailer)
    3. 挂车车顶的琥珀色灯
    4. 挂车支腿上的绿灯

    答案: B. 挂车左后方的黄灯一直亮着，说明ABS工作不正常。

    来源: North Dakota CDL Manual (AAMVA model), Section 2, p. 32For trailers only, if the yellow light on the left rear of the trailer stays on, the ABS is not working properly.

  18. #18

    气压应充到调节器切断压力，通常约为：

    英文原文: Air pressure should be built up to the governor cut-out, which is usually around:

    1. 60至80 psi
    2. 90至100 psi
    3. 120至140 psi (120 to 140 psi)
    4. 150至180 psi

    答案: C. 调节器通常在约120至140 psi时切断，但要了解自己车辆的要求。

    来源: North Dakota CDL Manual (AAMVA model), Section 2, p. 32Build air pressure to governor cut-out (usually around 120 - 140 psi.

  19. #19

    出车前检查灯光、下车前，应拉好驻车制动、熄火并：

    英文原文: Before getting out to check the lights during the pre-trip, you should set the parking brake, turn off the engine and:

    1. 把钥匙留在点火开关上
    2. 把钥匙挂在后视镜上
    3. 把钥匙交给帮手
    4. 随身带走钥匙 (take the key with you)

    答案: D. 拉好驻车制动，熄火，并随身带走钥匙。

    来源: North Dakota CDL Manual (AAMVA model), Section 2, p. 33Make sure the parking brake is set, turn off the engine, and take the key with you.

  20. #20

    出车前检查时如何测试驻车制动？

    英文原文: How do you test the parking brake during the pre-trip inspection?

    1. 挂低档，在拉紧驻车制动的情况下轻轻向前拉车 (Put the vehicle in a low gear and gently pull forward against the set brake)
    2. 以20 mph行驶时拉驻车制动
    3. 松开制动，检查车辆是否自由滚动
    4. 拉紧制动后用手摇晃车辆

    答案: A. 拉紧驻车制动，挂低档并轻轻向前拉车；驻车制动应能固定住车辆。

    来源: North Dakota CDL Manual (AAMVA model), Section 2, p. 35Gently pull forward against parking brake to make sure the parking brake holds.

  21. #21

    应在车内保留一份车辆检查报告副本多长时间？

    英文原文: How long should you keep a copy of your vehicle inspection report in the vehicle?

    1. 一小时
    2. 一天 (One day)
    3. 一周
    4. 一个月

    答案: B. 下一位司机可通过保留一天的副本了解您发现的问题。

    来源: North Dakota CDL Manual (AAMVA model), Section 2, p. 35Keep a copy of your report in the vehicle for one day.

  22. #22

    什么时候应该在上一份车辆检查报告上签字？

    英文原文: When should you sign the last vehicle inspection report?

    1. 总是在发动引擎之前签署，无论是否发现缺陷
    2. 仅当您在自己的检查中没有发现任何缺陷时
    3. 只有在已记录的缺陷被证明已修复或无需修理时 (Only if defects were noted and certified as repaired or not needing repair)
    4. 仅在您无故障行驶了最初50英里之后

    答案: C. 只有当所记录的缺陷已证明修复或无需修理时才签字。

    来源: North Dakota CDL Manual (AAMVA model), Section 2, p. 31You must sign the report only if defects were noted and certified to be repaired or not needed to be repaired.

  23. #23

    对平头（驾驶室在发动机上方）车辆，巡检时应检查什么？

    英文原文: On a cab-over-engine vehicle, what should you check during the walkaround inspection?

    1. 驾驶室是否向前倾斜
    2. 车门是否仅从内部锁上
    3. 引擎盖锁扣是否打开
    4. 主、副安全驾驶室锁是否已锁定 (That the primary and secondary safety cab locks are engaged)

    答案: D. 平头车的主、副安全驾驶室锁都必须锁定。

    来源: North Dakota CDL Manual (AAMVA model), Section 2, p. 33Primary and secondary safety cab locks engaged (if cab-over-engine design).

  24. #24

    为什么每次出车前检查都应采用同样的方式？

    英文原文: Why should you do a pre-trip inspection the same way each time?

    1. 这样能记住所有步骤，不容易遗漏 (You learn all the steps and are less likely to forget something)
    2. 考官在技能考试中总是要求相同的顺序
    3. 联邦法律规定了检查中每个步骤的顺序
    4. 这样可以省油，因为发动机怠速的时间更短

    答案: A. 每次用同样的方式检查，有助于记住步骤并避免遗漏。

    来源: North Dakota CDL Manual (AAMVA model), Section 2, p. 31You should do a pre-trip inspection the same way each time so you will learn all the steps and be less likely to forget something.

  25. #25

    每次出车前，卡车司机必须确保卡车没有超载，并且货物：

    英文原文: Before each trip, a truck driver must make sure that the truck is not overloaded and that the cargo is:

    1. 已加封并拍照
    2. 已平衡并固定 (balanced and secured)
    3. 已在公共地磅上称重
    4. 集中装在车尾

    答案: B. 每次行程前，卡车不得超载，货物必须平衡并固定好。

    来源: North Dakota CDL Manual (AAMVA model), Section 2, p. 31You must make sure the truck is not overloaded and the cargo is balanced and secured before each trip.

  26. #26

    在CDL车辆检查考试中，您不需要：

    英文原文: During the CDL vehicle inspection test, you will NOT have to:

    1. 说出或指出所检查的项目
    2. 钻到车底下检查 (crawl under the vehicle)
    3. 向考官解释您在检查什么
    4. 使用手册提供的检查清单

    答案: B. 您必须说出、指出并解释每个项目，但不需要钻到车底下。

    来源: North Dakota CDL Manual (AAMVA model), Section 11, p. 139You will NOT have to crawl under the vehicle.

  27. #27

    在气刹检查中，气压调节器（governor）大约在多少压力时切断？

    英文原文: During the air brake check, the air governor cuts out at approximately:

    1. 60至80 psi
    2. 90至110 psi
    3. 150至170 psi
    4. 120至140 psi (120 to 140 psi)

    答案: D. 把气压升到调节器切断点，约为120-140 psi，或制造商规定的值。

    来源: North Dakota CDL Manual (AAMVA model), Section 11, p. 141Build the air pressure to governor cutout and identify the range of activation. This will occur at approximately 120 – 140 psi OR level specified by the manufacturer.

  28. #28

    在漏气率测试中，组合车辆的气压在一分钟内最多可下降多少磅？

    英文原文: In the air leakage rate test, the air pressure may drop no more than how many pounds in one minute for a combination vehicle?

    1. 4磅 (4 pounds)
    2. 2磅
    3. 3磅
    4. 6磅

    答案: A. 组合车辆的气压一分钟内最多可下降四磅；单体车辆为三磅。

    来源: North Dakota CDL Manual (AAMVA model), Section 11, p. 141Inspect the air gauge to see if the air pressure drops no more than three (3) pounds in one (1) minute (single vehicle or trailer without airbrakes) or four (4) pounds in one (1) minute (combination vehicle) after initial stabilization.

  29. #29

    在紧急制动测试中，驻车制动阀应在多大压力范围内关闭（弹出）？

    英文原文: In the emergency brake test, the parking brake valve should close (pop out) between:

    1. 5 psi至15 psi之间
    2. 50 psi至70 psi之间
    3. 20 psi至45 psi之间 (20 psi and 45 psi)
    4. 80 psi至100 psi之间

    答案: C. 驻车（紧急）制动阀应在20 psi至45 psi之间弹出，或按制造商规定的值。

    来源: North Dakota CDL Manual (AAMVA model), Section 11, p. 141The parking brake (or emergency brake) valve should close (pop out) between 20 psi and 45 psi (no less than 20 psi and no more than 45 psi) OR level specified by the manufacturer.

  30. #30

    如果未能正确讲解并演示气刹检查的全部四个部分，将导致：

    英文原文: Failure to explain and demonstrate all four parts of the air brake check correctly will result in:

    1. CDL车辆检查考试自动不及格 (an automatic failure of the CDL Vehicle Inspection test)
    2. 考官给出警告
    3. 仅在气刹部分扣分
    4. 对气刹检查再给一次机会

    答案: A. 未正确完成气刹检查的全部四个部分，将导致车辆检查考试自动不及格。

    来源: North Dakota CDL Manual (AAMVA model), Section 11, p. 141Failure to explain and demonstrate (perform) all four (4) parts of the air brake check correctly will result in an automatic failure of the CDL Vehicle Inspection test.

  31. #31

    检查发动机皮带松紧度时，皮带中部允许有多大的松动量？

    英文原文: When checking engine belts for snugness, how much play is allowed at the center of the belt?

    1. 最多1/4英寸
    2. 最多2英寸
    3. 最多3英寸
    4. 最多3/4英寸 (Up to 3/4 inch)

    答案: D. 皮带应绷紧，中部松动量最多3/4英寸，且无裂纹或磨损。

    来源: North Dakota CDL Manual (AAMVA model), Section 11, p. 131Check the following belts for snugness (up to 3/4 inch play at center of belt), cracks, or frays:

  32. #32

    对于手动间隙调整器，制动器松开时用手拉拉杆，推杆的移动量不应超过：

    英文原文: For manual slack adjustors, the brake pushrod should not move more than how far when pulled by hand with the brakes released?

    1. 半英寸
    2. 一英寸 (One inch)
    3. 两英寸
    4. 三英寸

    答案: B. 制动器松开时，用手拉动，手动间隙调整器的推杆移动不应超过一英寸。

    来源: North Dakota CDL Manual (AAMVA model), Section 11, p. 133For manual slack adjustors, the brake pushrod should not move more than one inch (with the brakes released) when pulled by hand.

  33. #33

    用油尺检查发动机机油油位时，油位必须：

    英文原文: When checking the engine oil level with the dipstick, the level must be:

    1. 正好在“满”标记处
    2. 低于补充标记
    3. 在油尺最底端
    4. 高于补充（refill）标记 (above the refill mark)

    答案: D. 机油油位必须在安全工作范围内，高于补充标记。

    来源: North Dakota CDL Manual (AAMVA model), Section 11, p. 131See that oil level is within safe operating range. Level must be above refill mark.

  34. #34

    在行车前检查冷却液液位时，如果发动机很热，应当：

    英文原文: When checking coolant level during the pre-trip inspection, if the engine is hot you should:

    1. 缓慢打开水箱盖释放压力
    2. 不要打开水箱盖 (not remove the radiator cap)
    3. 只在发动机运转时打开水箱盖
    4. 通过水箱盖加水

    答案: B. 如果发动机很热，不要打开水箱盖。

    来源: North Dakota CDL Manual (AAMVA model), Section 11, p. 144Caution: If the engine is hot, do not remove the radiator cap.

  35. #35

    在行车前检查考试中，下列哪种做法检查轮胎气压不能得分？

    英文原文: During the pre-trip inspection test, what will NOT earn you credit for checking tire inflation?

    1. 仅仅踢一踢轮胎 (Simply kicking the tires)
    2. 使用轮胎气压表
    3. 说明会使用轮胎气压表
    4. 检查气门嘴是否便于接近

    答案: A. 如果只是踢轮胎，您不会得分；必须使用轮胎气压表检查气压。

    来源: North Dakota CDL Manual (AAMVA model), Section 11, p. 134You will not get credit if you simply kick the tires to check for proper inflation.

  36. #36

    在装有排放后处理装置的车辆上，柴油机尾气处理液（DEF）油箱的液位达到多少才算足够？

    英文原文: On a vehicle with emissions after-treatment equipment, the diesel exhaust fluid (DEF) tank level is adequate when it is:

    1. 超过1/2箱
    2. 超过3/4箱
    3. 超过1/8箱 (more than 1/8 tank)
    4. 必须加满

    答案: C. DEF液位超过1/8箱即为足够。

    来源: North Dakota CDL Manual (AAMVA model), Section 11, p. 134Checks DEF tank to ensure the level of diesel exhaust fluid in the tank is adequate (more than 1/8th tank)

  37. #37

    检查车轮轮辋时，下列哪种情况是不允许的？

    英文原文: When inspecting wheel rims, which condition is not allowed?

    1. 表面干净
    2. 轮辋有焊接修补 (Welding repairs on the rim)
    3. 轮辋平直
    4. 轮辋螺栓孔是圆的

    答案: B. 轮辋不能有焊接修补。

    来源: North Dakota CDL Manual (AAMVA model), Section 11, p. 134Rims cannot have welding repairs.

  38. #38

    检查第五轮（鞍座）时，您要查看间隙，确认锁紧爪：

    英文原文: When inspecting the fifth wheel, you look into the gap to check that the locking jaws are:

    1. 在主销周围是张开的
    2. 压在挂车裙板上
    3. 涂有润滑脂
    4. 完全闭合在主销（kingpin）周围 (fully closed around the kingpin)

    答案: D. 查看第五轮间隙，确认锁紧爪完全闭合在主销周围。

    来源: North Dakota CDL Manual (AAMVA model), Section 11, p. 135Look into fifth wheel gap and check that locking jaws are fully closed around the kingpin.

  39. #39

    检查连接时，挂车应当：

    英文原文: When checking the coupling, the trailer should be:

    1. 平放在第五轮滑板上，没有间隙 (laying flat on the fifth wheel skid plate with no gap)
    2. 比滑板高出约一英寸，留有一小段间隙
    3. 略微向前倾斜，滑板后部留有间隙
    4. 靠支腿支撑，而不是落在滑板上

    答案: A. 确认挂车平放在第五轮滑板上，没有间隙。

    来源: North Dakota CDL Manual (AAMVA model), Section 11, p. 135Check that the trailer is laying flat on the fifth wheel skid plate (no gap).

  40. #40

    如果申请A类CDL，您将进行行车前检查的几个版本之一？

    英文原文: If you apply for a Class A CDL, you will perform one of how many versions of the pre-trip inspection?

    1. 两个
    2. 三个
    3. 四个 (Four)
    4. 五个

    答案: C. A类申请人从四个等效版本中做一个；B类或C类申请人从三个版本中做一个。

    来源: North Dakota CDL Manual (AAMVA model), Section 11, p. 137If you are applying for a Class A CDL, you will be required to perform one of the four versions of a pre-trip inspection in the vehicle you have brought with you for testing.

  41. #41

    在车辆检查考试中做出“不安全行为”（如忘记拉驻车制动），可能导致：

    英文原文: Committing an "unsafe act" during the vehicle inspection test, such as forgetting to set the parking brake, may result in:

    1. 仅扣少量分数，考试照常继续
    2. 在考官评分前有再做一次该步骤的机会
    3. 自动不及格，考官可能终止考试 (an automatic failure, and the examiner may terminate the test)
    4. 口头警告，不会记录在您的考试评分表上

    答案: C. 不安全行为可能导致自动不及格，考官也可能终止考试。

    来源: North Dakota CDL Manual (AAMVA model), Section 11, p. 139Committing an "unsafe act" (e.g., forgetting to set the parking brake) may result in an automatic failure and the test may be terminated by the examiner.

  42. #42

    在车辆检查考试中，下车时您必须：

    英文原文: During the vehicle inspection test, when exiting the vehicle you must:

    1. 拉好驻车制动并将车辆挂入空档 (set the parking brake(s) and place the vehicle in neutral)
    2. 让发动机保持挂挡，并松开驻车制动
    3. 松开驻车制动并让车辆保持在低速挡
    4. 将钥匙转到附件挡位并让制动保持松开

    答案: A. 下车时必须拉好驻车制动并将车辆挂入空档。

    来源: North Dakota CDL Manual (AAMVA model), Section 11, p. 139When exiting the vehicle, you must set the parking brake(s) and place the vehicle in neutral.

  43. #43

    对于组合车辆，除了仪表板上的ABS指示灯外，检查时哪个灯应先亮后灭？

    英文原文: For combination vehicles, in addition to the dashboard ABS indicator, which light should turn on and then off during the check?

    1. 挂车乘客侧的示宽灯
    2. 牵引车前部标志灯
    3. 挂车制动灯
    4. 挂车后部驾驶员一侧的ABS灯 (The rear driver's side trailer ABS light)

    答案: D. 仅限组合车辆：如有配备，挂车后部驾驶员一侧的ABS灯应先亮后灭。

    来源: North Dakota CDL Manual (AAMVA model), Section 11, p. 139ABS indicator on dashboard; (and for combination vehicles only, the rear driver's side trailer ABS light should turn on then off), if equipped.

  44. #44

    哪些迹象可能表明车轮螺母松动？

    英文原文: Which signs may indicate that lug nuts are loose?

    1. 轮毂干净干燥
    2. 锈迹流痕或螺纹发亮 (Rust trails or shiny threads)
    3. 车轮上有新漆
    4. 胎面磨损均匀

    答案: B. 不应有锈迹流痕或发亮的螺纹，它们可能表示螺母松动。

    来源: North Dakota CDL Manual (AAMVA model), Section 11, p. 145Inspect that lug nuts are not loose and there are no signs of rust trails or shiny threads that may show looseness.
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