InspectionCâu 42 / 60
Before the leak-down (static) tests, to what pressure should the air system be brought?
a.About 20 psi
b.About 45 psi
c.About 60 psi
d.Governor cutout, about 125 psi (fully charged)
Giải thích
Before performing the applied and released leak-down tests, the system should be fully charged to about governor cutout pressure (around 125 psi). Starting from full charge gives an accurate measure of how much air leaks out over one minute. Testing from a low pressure would not reveal the true leak rate.
Luyện miễn phí toàn bộ 60 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Why should you drain the air tanks and check for oil or water before a trip if the tanks do not have automatic drains?
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- What does it mean if the low-pressure warning stays on after you start building air pressure?
- 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?
- Why is it important to check that the governor cuts the compressor in and out at the correct pressures?
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