德州商用车操作（CVO）考试是获得德州商用驾驶执照（CDL）的重要步骤。该考试评估考生对操作商用车辆相关的安全和法规知识。考试包括理论题和实际驾驶测试。
这些问题将帮助您更好地理解考试的格式，并尽可能有效地为考试做准备。实际问题位于本页面的下方。
Color of clearance lamps on front of a vehicle
Amber
车辆前部的侧标灯颜色
琥珀色
The load on a vehicle may not extend beyond the front of the vehicles, without a special permit, more than:
Three feet
没有特殊许可证的情况下，车辆的货物不得从车前伸出超过：
三英尺
Trailer and semitrailers must ordinarily have brakes that can be applied by the driver when the gross weight of the trailer exceeds:
4,500 pounds
当拖车的总重量超过：
4,500 磅时，拖车和半挂车通常必须配备司机可以操控的刹车系统。
The load on a truck may not extend over the rear of the vehicle more than:
four feet
货车的货物不得从车辆后部伸出超过：
四英尺
All trailers or semitrailers must be equipped with clearance lamps, side marker lamps, and side reflectors if their width is:
80 inches or more
所有宽度为：
80 英寸或以上的拖车或半挂车，必须配备侧标灯、侧标灯和侧反光片。
To find out the details about registering your particular vehicle, you should consult:
County Tax-Assessor Collector
要了解注册特定车辆的详细信息，您应咨询：
县税务评估员兼收款员
When one truck is following another truck or vehicle, it may keep far enough back to allow how many vehicles to enter safely between them?
One vehicle
一辆卡车跟随另一辆卡车或车辆时，应该保持多远的距离以允许多少辆车安全进入其间？
一辆车
Turn signal indicators are required on all motor vehicles manufactured after model year?
1959
转向灯指示器适用于制造年份为：
1959 年后的所有机动车辆。
No combination of vehicles, other than a truck tractor-trailer combination, may exceed:
65 feet
除了卡车-拖车组合以外，车辆的组合长度不得超过：
65 英尺
Vehicles transporting loose materials (sand, dirt, gravel, etc.) that is capable of spilling or blowing from the vehicle must:
Meet loading and/or covering regulations to prevent spilling or blowing.
运送散装材料（如沙子、泥土、砾石等）的车辆，必须：
符合装载和/或覆盖规定，以防止洒落或飞扬。
Every farm tractor and every self-propelled unit of farm equipment or implement of husbandry manufactured or assembled after January 1, 1972, complies with state lighting laws by:
Having two headlamps
1972 年 1 月 1 日之后制造或组装的所有农用拖拉机和自走式农用设备或农具，必须符合州照明法律，通过：
安装两个前灯
The maximum speed limit for a taxicab on numbered U.S. or state highways in the daytime is:
70 mph
白天时，美国或州公路上的出租车最高限速为：
70 英里/小时
To operate on the highway a motor vehicle or trailer having metal, tires and weighing 5,000 pounds or more, you must:
Get a special permit from the Texas Department of Transportation.
操作轮胎为金属且总重 5,000 磅或以上的机动车辆或拖车在公路上行驶，您必须：
从德州交通部获得特殊许可证。
During the times when lighted lamps are not required, the driver should set out:
two approved red flags
在不需要开灯的时间段内，司机应设置：
两个经批准的红旗
Before going down a steep grade with a commercial vehicle, you should:
Shift to a lower gear.
在驾驶商用车辆下陡坡之前，您应：
换到低速档。
Every trailer must have how many reflectors on the rear?
Two
每辆拖车后部必须配备多少个反光片？
两个
No passenger vehicle may be coupled with more than:
One trailer
乘用车最多可以拖挂多少辆拖车？
一辆拖车
When is it necessary to place flares around a truck on a two-way road with a clear view, one must be placed beside the truck, the other two must be placed:
100 feet to the front and rear of the truck
什么时候需要在视野开阔的双向道路上，在卡车周围放置照明火炬，其中一个必须放在卡车旁边，另外两个必须放置在：
卡车前后 100 英尺处
All school buses, buses, taxis, and other vehicles hauling passengers for hire or lease must carry a chemical type fire extinguisher of at least:
One quart capacity.
所有校车、巴士、出租车以及其他载客的出租或租赁车辆必须携带至少：
一夸脱容量的化学灭火器。
When a load extends more than four feet over the rear of a vehicle, what color flag must be attached to the extreme end of the extension while driving in the daytime?
Red.
货物从车尾伸出超过四英尺时，白天驾驶时必须在伸出的末端挂上什么颜色的旗帜？
红色
Which of the following motor vehicles must stop at all railroad grade crossings outside a business or residential district?
Motor bus.
以下哪种机动车辆必须在非商业区或住宅区外的所有铁路道口停车？
公共汽车
The maximum number of trailers that may be lawfully towed by one vehicle is:
Two
一辆车可合法牵引的最大拖车数量为：
2
The maximum number of trailers that may be towed by a commercial motor vehicle with an unloaded weight in excess of 2,500 pounds is:
Two trailers.
空载重量超过 2,500 磅的商用机动车辆可牵引的最大拖车数量为：
两辆拖车。
To haul a load or more equipment that is wider, heavier, or longer than the law permits, you must:
Obtain a permit from the Texas Department of Transportation
拖运比法律允许更宽、更重或更长的货物或设备时，您必须：
从德州运输局获得许可。
Clearance lights are required by state law for trucks or buses if the width is:
80 inches or more
州法律要求如果卡车或巴士的宽度为：
80 英寸或以上，必须配备清晰灯。
When towing another vehicle with a chain, rope, or cable, what color flag must be attached to the chain, rope, or cable?
White
用链条、绳索或电缆拖拽其他车辆时，必须在链条、绳索或电缆上挂上什么颜色的旗帜？
白色
It is unlawful to operate a motor vehicle on a highway with:
Flanges or lugs on the wheels.
在高速公路上驾驶带有以下装置的机动车辆是违法的：
轮子上的法兰或凸耳。
One purpose of requiring registration papers on trucks at all times is to show:
The weight of the truck empty and how much it is registered to haul.
要求卡车始终携带登记文件的一个目的是为了显示：
卡车空载的重量以及它被登记允许运载的重量。
The top speed limit for heavy trucks on designated rural interstate in the nighttime is:
65 mph
重型卡车在指定的乡村州际公路上夜间的最高限速是：
65 英里每小时
When going downhill with a commercial vehicle, it is unlawful to:
Coast.
驾驶商用车辆下坡时，违法行为是：
滑行
Which of the following vehicles are not required to have mud flaps?
Pole trailers.
以下哪种车辆不需要安装挡泥板？
杆式拖车
What is the maximum speed limit for a taxicab on a numbered U.S. or state highway during the day?
70 mph
在编号的美国或州高速公路上，白天出租车的最高限速是：
70 mph
A slowing moving vehicle emblem must be displayed only by:
Vehicles designed to be operated at speeds of 25 mph or less.
慢行车辆标志只能由哪些车辆显示？
设计时速为 25 英里或以下的车辆
The first thing the driver of a disabled truck or bus should do is:
Set out flares, reflectors, or flags.
失效卡车或巴士的驾驶员应做的第一件事是：
设置信号灯、反光板或旗帜
The length requirements of state law for vehicles or combinations of vehicles, including extensions over the front and rear, do not apply:
Within city limits.
车辆或车辆组合的长度要求，包括前后延伸部分，不适用于：
城市范围内
The height from the ground for mounting reflectors must be at least:
24 inches
反光板离地面的高度至少为：
24 英寸
When turning with a long vehicle or combination truck-trailer, if it is impossible to stay in the proper lane, you should:
Approach the corner about 4 feet from the curb or right edge of the roadway, then if necessary, complete the turn in the center of the street entered.
驾驶长车或卡车-拖车组合转弯时，如果无法留在正确的车道上，应该：
在离路缘或道路右边缘约4英尺处转弯，然后如果有必要，完成在进入街道中央的转弯
Clearence lamps mounted on the rear or on the side near the rear of a vehicle must be what color?
Red.
安装在车辆后部或接近车辆后部侧面的清晰灯必须是什么颜色？
红色
When stopped on the side of a divided highway, flags or reflectors must be placed:
One 10 feet behind the vehicle, one 100 feet behind, and one 200 feet behind the vehicles.
在分隔的高速公路上停车时，旗帜或反光板应放置在：
车辆后方10英尺处、后方100英尺处和后方200英尺处各放置一个
The maximum speed limit for a pickup truck with a manufacturer's rated carrying capacity of 2,000 lbs or less on U.S. or state highway in the daytime is:
70 mph
白天在美国或州高速公路上，额定载重量不超过 2,000 磅的皮卡车的最高限速是：
70 mph
When backing a large truck you should:
Have someone guide you.
倒大卡车时，应该：
有人引导
The greatest weight allowed by state law for any vehicle including its load is:
80,000 pounds
根据州法律允许的车辆和其载荷的最大重量是：
80,000 磅
The greatest height ordinarily allowed by state law for a vehicle including its load is:
14 feet
根据州法律允许的车辆和其载荷的最大高度是：
14 英尺
The greatest width allowed by State law for a truck including its load is:
102 inches or 8 1/2 ft
根据州法律允许的卡车和其载荷的最大宽度是：
102 英寸或 8 1/2 英尺
The greatest length allowed by State law for a single motor vehicle other than a truck tractor is:
45 feet
根据州法律允许的单辆机动车辆（卡车头除外）的最大长度是：
45 英尺
One purpose of requiring registration papers on trucks at all times is to show:
Weight of the truck empty and how much it is registered to haul.
要求卡车始终携带登记文件的一个目的是：
显示卡车的空载重量和其登记允许运载的重量
To operate on the highway a motor vehicle or trailer having metal tires and weighting 5,000 lbs or more must have:
A special permit from the Department of Transportation.
驾驶重达5,000磅或以上的金属轮胎机动车或拖车在公路上行驶时，必须有：
交通运输部的特殊许可证
To prevent damage to the highway it is unlawful to operate any motor vehicle with:
Studs or spikes on the wheels.
为了防止对公路的损坏，驾驶任何带有轮钉或轮辊的机动车辆是违法的
车轮上装有螺柱或钉子
Air brake systems combine what three different systems?
Service brakes, parking brakes, and emergency brakes.
空气制动系统结合了哪三种不同的系统？
行车制动、驻车制动和紧急制动
When should you drain the air tanks?
After every working day.
何时应排空空气罐？
每个工作日结束后
Why drain water from the compressed air tanks?
Water can freeze in cold weather and cause brake failure.
为什么要从压缩空气罐中排水？
水会在寒冷天气中冻结，导致刹车失灵
Air brake-equipped vehicles must have:
A supply pressure gauge and a warning signal when psi drops below 60.
配备空气制动的车辆必须有：
供应压力表和在压力低于60 psi时的警告信号
What can legally hold a parking or emergency brake in position for a truck, truck tractor, or bus?
Spring pressure.
什么可以合法地保持卡车、卡车头或巴士的停车或紧急制动？
弹簧压力
The first thing you should do when the low air pressure warning comes on?
Stop and safely park ASAP.
当低气压警告灯亮起时，首先应该做的事情是？
尽快停下并安全停车
The braking power of the spring brakes:
Depends on the adjustment of the service brakes.
弹簧制动的制动力：
取决于服务制动的调整
The application pressure gauge shows the driver how much pressure:
Is being applied to the brakes.
应用压力表显示司机施加了多少压力：
施加在制动器上的压力
Which type of brake is the most common in commercial vehicles?
S-cam brake
哪种类型的制动器在商用车辆中最常见？
S凸轮制动器
An application pressure gauge...
Shows how much air pressure you are applying to the brakes.
应用压力表。。。
显示你施加在刹车上的空气压力
To test service brakes you should...
Release the parking brake, move forward slowly, and depress the brakes.
测试服务制动器的方法是。。。
松开驻车制动，慢慢前行，然后踩下刹车
Air brakes take longer to stop than hydraulic brakes because...
It takes longer for the air to flow through the lines.
空气制动比液压制动需要更长的时间才能停车，因为。。。
空气通过管道流动需要更长的时间。
The proper way to go down long grades is to...
Apply brakes just hard enough to reduce speed to 5 mph below safe speed, then release until back to safe speed and repeat the process.
下长坡的正确方法是。。。
刹车施加的力度只需足够降低速度至安全速度下方5英里/小时，然后释放刹车，直到回到安全速度，重复此过程。
When should you avoid using the parking brake?
When the brakes are hot.
在何时应避免使用驻车制动？
当刹车过热时。
If your vehicle has an alcohol evaporator, everyday during cold weather you should:
Check and fill the alcohol level.
如果你的车辆有酒精蒸发器，在寒冷天气中每天应该：
检查并补充酒精水平。
During normal driving, spring brakes are usually held back by what?
Air pressure
在正常驾驶情况下，弹簧制动器通常是由什么保持在后面的？
空气压力
In air brake vehicles, the parking brakes should be used when?
Whenever the vehicle is parked.
在空气制动车辆中，驻车制动器应在什么时候使用？
每当车辆停放时。
The brake pedal in an air brake system does what?
Controls the air pressure applied to put on the brakes.
空气制动系统中的刹车踏板做什么？
控制施加刹车时所需的空气压力。
A straight truck or bus air brake system should not leak at a rate of more than ____ PSI per minute with the engine off and the brakes released.
2
直线卡车或公交车的空气制动系统在发动机关闭和刹车释放的情况下，不应以超过 ____ PSI 每分钟的速率泄漏。
二
An alcohol evaporator does what?
Reduces the risk of ice in the air brake valves in cold weather.
酒精蒸发器的作用是什么？
在寒冷天气中降低空气制动阀结冰的风险。
Air loss should not be more than ___ with the engine off and brakes released.
2 psi per minute
在发动机关闭和刹车释放的情况下，空气损失不应超过 ___。
每分钟2 PSI
How do you know when your brakes are fading?
You have to push harder on the brake pedal to control your speed on a downgrade.
你如何知道你的刹车正在失效？
在下坡时，你必须更用力地踩刹车踏板来控制速度。
To check the free play of manual slack adjusters on S-cam brakes you should:
Park on a level ground, chock wheels, and release parking brake.
检查S型凸轮制动器手动松弛调节器的自由行程时，应：
停在平坦的地面上，堵住车轮，释放驻车制动。
When driving down a long steep hill you should:
Release the brake when you are 5 mph below your safe speed.
在长而陡的山坡下行驶时，你应该：
当你低于安全速度5英里/小时时释放刹车。
The most common type of foundation brakes found on heavy vehicles is the:
S-cam drum
重型车辆上最常见的基础制动器是：
S型凸轮鼓式制动器
Air brakes should be drained...
1. At the end of each working day.
2. To keep sludge from clogging system valves.
3. Manually when automatic devices fail.
空气制动应在以下情况下排放。。。
1. 在每个工作日结束时。 2. 为了防止污泥堵塞系统阀门。 3. 在自动装置失效时手动排放。
The governor allows the air to start pumping again when it reaches the cut-in level or around...
100 psi
当达到切入水平或约。。。
100 PSI时，调节器允许空气再次开始泵送。
You should not use the parking brakes...
When the brakes are hot.
你不应该使用驻车制动。。。
当刹车很热时。
The air compressor governor controls...
When the air compressor pumps air into the storage tanks.
空气压缩机调节器控制。。。
当空气压缩机向储气罐泵送空气时。
A dual air brake system...
Has two brake systems and one set of controls.
双重空气制动系统。。。
有两个制动系统和一组控制装置。
An emergency brake...
Is required on commercial vehicles, must be held by mechanical force, could be activated by loss of air pressure.
应急制动。。。
在商用车辆上是必需的，必须由机械力保持，可能因失去空气压力而激活。
With dual air systems, the air pressure should build...
From 85 to 100 psi in 45 seconds
在双重空气系统中，空气压力应在。。。
45秒内从85 PSI增加到100 PSI。
A fully charged air system typically has ____ psi.
125
完全充电的空气系统通常有 ____ PSI。
一百二十五
To test air leakage rate you should...
Turn off engine and release the service brake.
要测试空气泄漏速率，应。。。
关闭发动机并释放服务制动。
When testing air leakage rates for combination vehicles (before applying the brake pedal), air brake systems should not lose air faster than...
3 psi per minute.
在测试组合车辆的空气泄漏速率时（在踩下刹车踏板之前），空气制动系统不应以超过。。。
每分钟3 PSI的速度泄漏空气。
