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Question
A safety valve is set to open at ____ pounds per square inch (psi).
Answers
A.  100
B.  150
C.  200
Explanation
The safety valve protects air tanks and the rest of an air brake system from accumulating too much air pressure. The safety valve is usually set to open at 150 psi.
Answer Statistics
23.05 % of our users get this question wrong.
This questions is considered quite Hard

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