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

1,3 and 4 are correct

2, 3 and 4 are correct

1,2 and 3 are correct

1, 2 and 4 are correct

80 and 90

90 and 80

85 and 75

75 and 83