纽约州，加州以及其它州商业车驾照气刹理论模拟题复习
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。
If you do not have automatic tank drains, how ofter should you drain compressed air storage tanks?
- None of these answers are correct
- After every four hours of service
- At the end of each day of driving - 正确答案
- Once a week
如果你驾驶的卡车上的压缩空气储存罐没有自动释法功能，则应在每天行驶结束时排空压缩空气储存罐
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
- Be sure air brakes system is fully pressurized.
- None of these answers are correct
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
The use of brakes on a long and steep downgrade under normal conditions is only a supplement to:
- The braking effect of the engine - 正确答案
- The use of the front brakes limiting valve
- None of these answers are correct
- Use of spring brakes
在正常情况下，车辆在长时间下坡情况下，使用刹车器只是对发动机刹车效果的辅助
If you must make an emergency stop, you should brake so you:
- None of these answers are correct
- Use the full power of the brakes to lock them
- Can steer and so your vehicle stays in a straight line. - 正确答案
- Use the hand brake before the brake pedal
如果必须紧急停车，则应刹车以便转向，使车辆保持在一条直线上。
The air loss rate for a straight truck or bus with the engine off and the brakes on should not be more than:
- 2 psi in 45 seconds
- 1 psi in 30 seconds
- 4 psi in 50 seconds
- 3 psi in one minute - 正确答案
发动机熄火且泊车刹车系统打开的情况下，卡车或巴士的空气损失率在一分钟内不应超过3 psi（磅每平方英寸）
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
- 30
- 80
- 60 - 正确答案
- 40
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
Why should you drain water from compressed air tanks?
- Water can freeze in cold weather and cause brake failure. - 正确答案
- None of these answers are correct
- Water cools the compressor too much
- Water low boiling point reduces braking power
你应将水从压缩空气罐中排出，因为水在寒冷的天气中会结冰并导致刹车失灵。
The air brake lag distance at 55 mph on dry pavement adds about __ feet
- 32 feet - 正确答案
- 52 feet
- 20 feet
- 12 feet
在干燥路面上以55 MPH(英里每小时)的速度行驶时的空气刹车滞后距离增加了约32英尺
To test air service brakes you should:
- Stop the vehicle, brake in a low gear, depress the service brakes, and then gently pull against the brakes
- Brake firmly while slowly moving forward - 正确答案
- None of these answers are correct
- Brake slowly while slowly moving backward
要测试服务刹车系统，你应该在缓慢前进的同时牢牢踩住刹车
Repeatedly partially releasing and pressing the brake pedal may result in:
- No change of brake air pressure
- None of these answers are correct
- A loss of brake air pressure - 正确答案
- A build up of brake air pressure
反复释放和踩下刹车踏板可能会导致刹车气压损失
The most important thing to do when a low air pressure warning comes on is:
- to stop and safely park as soon as possible. - 正确答案
- Upshift
- Downshift
- None of these answers are correct
出现低气压警告时，最重要的事情是尽快在安全情况下停下来。
The proper use of the brakes when going down a long steep grade after selecting a proper gear is to brake until your speed is about __ mph below the posted speed for your safety and release your brake
- 12 mph
- 10 mph
- 10 mph
- 5 mph - 正确答案
在长时间的陡坡下坡时，选择合适的档位后，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，以确保你可以安全并释放刹车器
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 test the remaining system while under way.
- None of these answers are correct
- Stop right away and safely park, Continue only after the system is fixed. - 正确答案
- Reduce your speed and drive to the nearest garage for repairs.
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。
A slack adjuster's free play needs to be adjusted if it is more than about __, how many inches when you pull hard on it?
- 1/2
- 1 Inch - 正确答案
- 1/4
- 2/4
如果松弛调节器的自由松动间距大于1英寸，则需要对其进行调节
With air brake vehicles, the parking brakes should be used:
- Any time when the vehicle is parked - 正确答案
- To hold your speed when going downhill
- None of these answers are correct
- As little as possible
对于带气刹系统的车辆，停车时应随时使用驻车(泊车)刹车
Emergency stab braking is:
- Use light steady pressure on the brake pedal
- When you press hard on a brake pedal and apply hand valve while you stop
- None of these answers are correct
- Press on the brake pedal as hard as you can, release the brakes when the wheels locked, brakes again when the wheels start rolling - 正确答案
紧急点刹是指在遇到紧急情况时，尽可能用力踩刹车踏板，当车轮锁住时释放刹车踏板，然后在车轮重新开始滚动时再次踩下刹车踏板
An air brake system is fully charged at what PSI?
- 75
- 120
- 125 - 正确答案
- 115
空气刹车系统在125 PSI(每平方英寸压力)时为充满气
Why drain water from compressed air tanks?
- Water cools the compressor too much
- Water low boiling point reduces braking power
- None of these answers are correct
- Water can freeze in cold weather and cause brake failure - 正确答案
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
Some air brake systems have an alcohol evaporator. What may happen if you don't keep the proper level of am alcohol?
- The S-cam may not take back when you release the brake pedal
- None of these answer are correct
- Ice may form on the brake drums and wear them out
- Ice may form in the air storage tank and cause a brake failure - 正确答案
一些气压刹车系统具有酒精蒸发器。 如果你没有保持适当的酒精，可能会在储气罐中形成冰块并导致刹车故障/失灵。
How should you check that your service brakes are working properly?
- 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 slight grade, drain off air pressure, set parking brake and check to to movement.
- 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。
