Question

vacuum is applied where during vacuum bleeding?
○ at the metering valve end of the combination valve
○ at the master cylinder reservoir
○ at each wheel brake bleeder valve
○ at the vacuum booster check valve

question 6
1 pts
the usual maximum pressure that should be used when pressure bleeding a brake system is
______?
○ 70 psi
○ 20 psi
○ 50 psi
○ 30 psi

question 7
1 pts
how does a bleeder valve seal?
○ by the threads
○ o - ring
○ lip seal
○ tapered end

Explanation:

• Vacuum bleeding removes air from brake lines; vacuum is applied at each wheel brake bleeder valve to draw fluid/air out.
• Pressure bleeding uses a pressure tank on the master cylinder; typical max pressure is 30 psi to avoid component damage.
• Bleeder valves seal via their tapered end, which mates with the caliper/wheel cylinder’s tapered seat when tightened.

Answer:

1. At each wheel brake bleeder valve
2. 30 psi
3. Tapered end