Some air brake systems have an alcohol evaporator. What may happen if you don't keep the proper level of alcohol?
Answer: B
Ice may form in the air brake valves and cause brake failure.
The purpose of an alcohol evaporator is to remove water from the air in the air brake system. Compressing air often causes condensation so the water needs to be removed. Alcohol attracts moisture and transports it to the evaporator. Failure to remove the air can cause the water to freeze in the system.
Source: Alabama CDL Manual
All choices
- AIce may form on the brake drums and wear them out.
- BIce may form in the air brake valves and cause brake failure.
- CThe S-cam may not take back when you release the brake pedal.
Alabama CDL Air Brakes Test Info
Questions on Exam
25
Passing Score
80%
Time Limit
Typically 30 minutes; varies by testing location
Age Requirements
Intrastate: 18+ · Interstate: 21+
Alabama Law Enforcement Agency (ALEA)
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More CDL Air Brakes Practice Questions
- To check the free play of manual slack adjusters of S-cam brakes, you should park on:
- A slack adjuster free play needs to be adjusted if it is more than about ____ when you pull hard on it.
- Stab braking:
- Which procedure is used in controlled braking?
- Which braking technique may be used to stop quickly when you do not have ABS?