Air Brakes Flashcards
0
Q
Low pressure warning psi
A
55-75. Or older vehicles 1/2 the cut out psi
1
Q
Spring brake activation psi
A
20-45psi
2
Q
Safety valve activation psi
A
150psi
3
Q
Minimum dual system operating psi
A
100psi
4
Q
Brake drum minimum thickness
A
1/4”
5
Q
Static air pressure test length and psi drops?
A
2psi singles
3 psi doubles
6
Q
Applied leakage test
A
3 psi singles
4 psi doubles
7
Q
Cut out pressure
A
Prior to 130psi
8
Q
Cut in pressure
A
No lower than 85 psi
9
Q
Air build up rate
A
85-100psi in 45 seconds
