2024 MA CDL Practice Test: Class A - Test 2
Based on
2024 MA CDL Handbook
16. On a truck with air brakes, what does the braking system’s air compressor do?
A
It obey school crossing-guards.
B
It maintains the proper level of air pressure so that the air brakes and any other air-powered accessories operate safely and consistently.
C
It makes you drive faster.