To check the free play of manual slack adjusters on S-cam brakes, you should park on:

Level ground and chock the wheels.. Section 5.3: Park on level ground and chock wheels so you can release the parking brake to check slack.

To check the free play of manual slack adjusters on S-cam brakes, you should park on:

ANSWER BREAKDOWN
  • A. Correct. Park on level ground and chock wheels so you can release the parking brake to check slack.
  • B. Incorrect. "A hill." is not correct. Park on level ground and chock wheels so you can release the parking brake to check slack.
  • C. Incorrect. "A bridge." is not correct. Park on level ground and chock wheels so you can release the parking brake to check slack.
  • D. Incorrect. "Grass." is not correct. Park on level ground and chock wheels so you can release the parking brake to check slack.