InspectionQuestion 45 of 60
Why is it important to check that the governor cuts the compressor in and out at the correct pressures?
a.To keep the tires properly inflated
b.To keep the speedometer accurate
c.So the system stays within a safe operating pressure range for braking
d.To reduce fuel consumption
Explanation
The governor must cut out at about 125 psi and cut in at about 100 psi to keep tank pressure in the safe operating range. If it cuts out too high, the safety relief valve may release air; if it cuts in too low, the brakes may not have enough air. Correct settings keep braking reliable.
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Related questions on this topic
- Why should you drain the air tanks and check for oil or water before a trip if the tanks do not have automatic drains?
- During the pre-trip air brake check, when should you check that the pushrod stroke is not too long?
- What does it mean if the low-pressure warning stays on after you start building air pressure?
- Before the leak-down (static) tests, to what pressure should the air system be brought?
- What is the correct order for the brake system portion of a pre-trip inspection regarding air build-up?
- If you find a lot of oil in the drained air from the tanks, what could this indicate?
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