Under federal regulations, the air pressure buildup time from 85 to 100 psi in a dual system must not take more than:

45 seconds.. Section 5.4: 45 seconds is the maximum time allowed for dual systems.

Under federal regulations, the air pressure buildup time from 85 to 100 psi in a dual system must not take more than:

ANSWER BREAKDOWN
  • A. Correct. 45 seconds is the maximum time allowed for dual systems.
  • B. Incorrect. 30 seconds is too short. The correct following distance is 45 seconds. 45 seconds is the maximum time allowed for dual systems.
  • C. Incorrect. "1 minute." is not correct. 45 seconds is the maximum time allowed for dual systems.
  • D. Incorrect. "2 minutes." is not correct. 45 seconds is the maximum time allowed for dual systems.