驾驶带有空气制动器的车辆需要获取气刹许可证。
在美国，要获得此认可证，申请人必须通过气刹原理考试。
考试由25道选择题组成。 每个问题有四个答案选择。 要通过，申请人必须正确回答至少20个问题。 大部分测试题来自纽约州商用机动车辆驾驶员手册。
空气制动器许可证可与 A、B 或 C级的驾照一起使用。
The driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks falls below ___ PSI
- 40
- 60 – 正确答案
- 30
- 80
驾驶员必须能够看到气压过低警告，该警告会在行车(服务)刹车储蓄气缸中的压力降至60 PSI以下前发生
It is not safe to drive a vehicle that has brake drums with cracks that are longer than __ of the width of the friction area
- 1/2 – 正确答案
- 1/3
- 1/4
- 1/8
驾驶刹车盘裂纹大于摩擦区域宽度的1/2的车辆是不安全的
The modern air brake system combines three different systems. They are the service, the parking, and __ brakes.
- Emergency – 正确答案
- Drum
- Foot
- None of these answers are correct
现代的气压刹车系统结合了三种不同的系统。 它们是服务(行车)，泊车和紧急刹车。
Your truck or bus has a dual air brake system. If a low air pressure warning comes on for only one system, what should you do?
- Reduce your speed and drive to the nearest garage for repairs.
- None of these answers are correct
- Reduce your speed, and test the remaining system while under way.
- Stop right away and safely park, Continue only after the system is fixed. – 正确答案
你的卡车或客车具有双气压刹车系统。 如果仅一个系统出现低气压警告，则应立即在安全情况下停下来，仅在系统修复后才可以继续上路。
The safety valve discharges automatically at the pressure of:
- 100
- 120
- 150 – 正确答案
- 50
安全阀在150 PSI的压力下自动排放
The parking or emergency brake on a heavy vehicle can only be held in position by something that cannot leak away, like:
- Hydraulic pressure
- None of these answers are correct
- Spring pressure – 正确答案
- Air pressure
重型车辆上的泊车或紧急刹车器只能通过诸如弹簧压力之类不能泄漏的东西保持在原位
If your truck has a properly functioning dual air brake system and minimum size air tanks the air pressure should build up from 85 to 100 psi within how many seconds?
- 45 – 正确答案
- 30
- 50
- 60
如果你的卡车配备有功能正常的双气制动系统和最小尺寸的气缸，气压应在45秒内从85 psi升至100 psi？
How should you check that your service brakes are working properly?
- Park on slight grade, drain off air pressure, set parking brake and check to to movement.
- None of these answers are correct
- Park on level ground, wait until normal air pressure is reached, release the parking brake and move forward slowly at about 5 mph. Then apply the brakes firmly using the brake pedal. – 正确答案
- Park on a level ground, chock the wheels, engage the parking brakes when you have the correct amount of air pressure to do so and shut the engine off.
检查服务刹车系统是否正常工作。 将车停在水平地面上，等到达到正常气压后，松开泊车刹车器并以约每小时5英里(5 MPH)的速度缓慢前进。 然后使用刹车踏板稳固地踩下刹车。
If you are driving down to the steep downgrade and you have reached the speed of 40 mph, you would apply the service brake until your speed dropped to below __ mph
- 40 – 正确答案
- 35
- 25
- 30
如果你从斜坡开下去并且速度已经达到40 mph(每小时英里)，则可以使用行车(服务)刹车直到速度降至35 mph以下。注：下坡时正确使用刹车的方法 – 刹车直到你的速度比路面限制的速度低大约5 mph(每小时英里)为止。
The brake system that applies and releases the brakes when the driver uses the brake pedal is the __ brake system
- None of these answers are correct
- Service – 正确答案
- Emergency
- Parking
驾驶员使用刹车踏板时，施加和释放刹车的刹车系统为服务(行车)刹车系统
In ideal conditions, a truck or bus with an air brake going at 55 mph would require stopping distance of ___, How many feet?
- Less than 150 feet
- Less than 100 feet
- From 100 to 300 feet
- More than 300 feet – 正确答案
在理想条件下，配备有气刹的卡车或巴士以55 mph(每小时英里)的速度刹车时，将需要300英尺以上的刹车距离
The safety valve reduces pressure at __ psi
- 150 – 正确答案
- 100
- 50
- 80
安全阀将在150磅每平方英寸(PSI)时降低气压
The spring brakes used on the chambers in a straight truck will bring you to a stop when air pressure drops below __ PSI
- 40
- 30
- 60
- 20 – 正确答案
当气压降至20 PSI以下时，直式卡车上使用的弹簧刹车器将使你的车停下来
All air brake equipped vehicles have
- None of these answers are correct
- An air usage gauge.
- A backup hydraulic system
- A supply pressure gauge – 正确答案
所有配备气压刹车的车辆都配有供气压力表。
Excessive heat caused by using your brakes too often can also cause:
- Brake linings to split up
- Modulated control valve to wear out.
- brake to fade or fail – 正确答案
- None of these answers are correct
过于频繁地使用刹车将引起刹车的热量过高，也会导致刹车力减退或失灵
Why drain water from compressed air tanks?
- Water cools the compressor too much
- Water can freeze in cold weather and cause brake failure – 正确答案
- None of these answers are correct
- Water low boiling point reduces braking power
你应该定期的排出压缩空气罐中的水。 因为水在寒冷的天气会结冰并导致刹车故障
Under normal conditions in order to engage the parking brakes. The driver should:
- Let the air out of the air brake system – 正确答案
- Turn off the engine
- None of these answers are correct
- Be sure air brakes system is fully pressurized.
正常情况下要启用驻车刹车器。 驾驶员应将空气排出空气刹车系统
If your vehicle has an alcohol evaporator, every day during cold weather you should:
- Check the oil for alcohol content
- None of these answers are correct
- Check and fill the alcohol level – 正确答案
- Change the alcohol from a new bottle
如果你的车辆装有酒精蒸发器，则在寒冷天气中，你每天都应检查并补充酒精含量
Your brakes are fading when:
- The brake pedal feel spongy when you apply pressure
- None of these answers are correct
- You have to push hard on a brake pedal to control your speed on a downgrade – 正确答案
- Less pressure is needed on the brake pedal for each stop
当你驾驶的车辆在下坡时需要用力的踩刹车踏板以控制车速，这说明刹车已过度磨损需及时更换。
A slack adjuster’s free play needs to be adjusted if it is more than about __
- 1/4 of inch
- 1 inch – 正确答案
- 1/3 of inch
- 1/2 of inch
如果松弛调节器的松动间隙超过大约1英寸，则需要对其进行调节
未经允许不得转载：美国驾照考试 » 美国卡车驾照气刹模拟题库
