CONCRETE BATCH PLANT OPERATOR
COMPREHENSIVE EXAM SCRIPT 2026
QUESTIONS AND SOLUTIONS 100% CORRECT
◉Wet Placement Backfill . Answer: Uses 70 gal water per 3,000 lb
super sack of flowable-fill. Telehandler restocks hopper until backfill
mark is reached. Used under asphalt cap.
◉Capping . Answer: Begins after 30 min initial set for wet placement.
No water sheen; must support foot traffic. Cap material can differ from
surrounding pavement.
◉Capping Materials . Answer: Rapid-set concrete or asphalt,
regardless of adjacent surface. Initial set times: 15 min (dry backfill), 30
min (wet backfill).
◉Rapid-Set Concrete Cap . Answer: Placed with volumetric mixer;
packaged in 3,000 lb super sacks; initial set 45 min, fully operational in
2 hrs.
◉Background . Answer: WWII wood planks → jets required durable
concrete-based repairs.
COMPREHENSIVE EXAM SCRIPT 2026
QUESTIONS AND SOLUTIONS 100% CORRECT
◉Wet Placement Backfill . Answer: Uses 70 gal water per 3,000 lb
super sack of flowable-fill. Telehandler restocks hopper until backfill
mark is reached. Used under asphalt cap.
◉Capping . Answer: Begins after 30 min initial set for wet placement.
No water sheen; must support foot traffic. Cap material can differ from
surrounding pavement.
◉Capping Materials . Answer: Rapid-set concrete or asphalt,
regardless of adjacent surface. Initial set times: 15 min (dry backfill), 30
min (wet backfill).
◉Rapid-Set Concrete Cap . Answer: Placed with volumetric mixer;
packaged in 3,000 lb super sacks; initial set 45 min, fully operational in
2 hrs.
◉Background . Answer: WWII wood planks → jets required durable
concrete-based repairs.
