The maximum leakage rates per minute after the initial pressure drop are
a) 5 psi for single vehicles and 10 psi for combination vehicles
b) 3 psi for single vehicles and 4 psi for combination vehicles
c) 1 psi for singe vehicles and 3 psi for combination vehicles
d) 5 psi for single vehicles and 6 psi for combination vehicles
Answer: b) 3 psi for single vehicles and 4 psi for combination vehicles
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