Air Brakes #2 - Iowa Cdl

1 . Anti-Lock Braking Systems (ABS):

Reduce a vehicle's normal braking capacity. Are in addition to other braking systems and do not reduce a vehicle's braking power. Are not effective on larger vehicles. Click Here Full Cheat Sheet

2 . If the low air pressure warning signal comes on, you should:

Continue driving, but have the brakes repaired within a week. Pull over and inspect the brakes. Phone a mechanic while driving. Take a FREE Practice Test Now

3 . What is removed when an air tank is drained?

Water and oil Ammonia Liquid cleaners Take a FREE Practice Test Now

4 . Lights that indicate that anti-lock brakes are not working are:

Gray. Blue. Yellow. Take a FREE Practice Test Now

5 . What do the two systems of a dual air brake system share?

Hoses An air compressor Air tanks Click Here Full Cheat Sheet

6 . ____ make up the emergency brake system.

Only parts of the parking brake system Only parts of the service brake system Parts of the parking and service brake systems Take a FREE Practice Test Now

7 . While operating on a downgrade, you should brake until you reach a speed that is:

5 mph below your safe speed. 10 mph below your safe speed. 15 mph below your safe speed. Take a FREE Practice Test Now

8 . What do air brakes use to make the brakes work?

Compressed air Outside air Non-compressed air Take a FREE Practice Test Now

9 . An alcohol evaporator is especially important:

In cold weather. In hot weather. In dry weather. Click Here Full Cheat Sheet

10 . What kind of brakes do most newer heavy-duty trucks use?

Single air brakes Dual air brakes Triple air brakes Take a FREE Practice Test Now

11 . Brakes can get out of adjustment quickly, especially:

If they are hot. In the winter time. If they are used frequently. Take a FREE Practice Test Now

12 . Air tank drains should:

Only be used by mechanics. Only be used when it is wet outside. Be used to drain the tanks completely. Take a FREE Practice Test Now

13 . When parked on a flat surface, you should:

Use wheel chocks to prevent your vehicle from moving. Not use wheel chocks. Use wheel chocks, but only if you have applied the parking brake. Click Here Full Cheat Sheet

Study tip: Reduce your study time from hours to minutes with a DMV exam “Cheat Sheet” 99.2% of people who use the cheat sheet pass the FIRST TIME Click Here Full Cheat Sheet

14 . Do not operate a vehicle if any brake drums have cracks that are larger than ____ of the width of the friction area.

One half One third One fifth Take a FREE Practice Test Now

15 . While driving, ____ generally holds spring brakes in place.

Air pressure Electricity Gasoline Take a FREE Practice Test Now

16 . When parking, you should not use the parking brake if:

The brakes are very hot. The brakes are very cold. There is snow on the ground. Take a FREE Practice Test Now

17 . In a vehicle with dual parking control valves, a separate air tank can be used:

To make the air brakes work more effectively. To temporarily release the spring brakes. To charge the brakes on the rear trailer. Click Here Full Cheat Sheet

18 . What kind of force do emergency brakes use?

Air pressure Mechanical Heavy Take a FREE Practice Test Now

19 . If the low air pressure warning signal comes on in a vehicle with air brakes, the driver should:

Test the brakes while driving, but continue driving if nothing seems wrong. Immediately stop driving. Drive with the hazard lights activated. Take a FREE Practice Test Now

20 . Brake fade is a result of:

Brakes being exposed to sunlight. Brakes being exposed to moisture. Excessive use of the brakes. Take a FREE Practice Test Now

21 . Manual air tank drains should be:

Opened to drain the tanks after each day. Left open while driving. Sealed with glue. Click Here Full Cheat Sheet

22 . Once the air tanks are at an air pressure level of 125 psi, the air compressor governor will:

Stop the compressor from pumping air. Release air from the tanks. Begin pumping air into the tanks. Take a FREE Practice Test Now

23 . A slack adjuster should move no more than ____ from where it is attached to the push rod.

Two inches Five inches One inch Take a FREE Practice Test Now

24 . Air storage tanks:

Are not allowed on a vehicle. Hold compressed air for the brakes. Should be drained of excess air after every trip. Take a FREE Practice Test Now

25 . Emergency brakes:

Are not required on vehicles with air brakes. Are required only on buses. Are required on all vehicles. Click Here Full Cheat Sheet