Ace Your DMV Written Test with our Guaranteed Cheat Sheet.
Cheat sheet
Question
What kind of force must emergency brakes use?
Answers
A.  Air pressure
B.  Mechanical
C.  Heavy
D.  Electrical
Explanation
Because air pressure can eventually leak away, the emergency brakes in an air brake system must be held on by mechanical force.
Answer Statistics
30.22 % of our users get this question wrong.
This questions is considered quite Hard

Pass your DMV Written Test with flying colors

Our Latest Videos
Ace Your DMV Written Test
Get your Cheat Sheet Now!