Bulldozer
Clam shell
Scraper
Dump truck
Smooth-wheeled rollers
Vibratory rollers
Sheep foot rollers
Tampers
Hoe
Shovel
Dragline
None of the above
Kneading
Pressing
Tamping
Vibration
controlling the total quantity at each batch
weighing accurately, the quantity of each material for a job before mixing
controlling the quantity of each material into each batch
adjusting the water to be added in each batch according to the moisture content of the materials being mixed in the batch