WT 1 – Cement and concrete production (Book 8, test 3)	

Concrete production requires four raw materials: 15% cement, 10% water, 25% sand, and 50% gravel. 	
In the cement production process, two raw materials, cement and clay, are crushed and mixed together and then passed through a rotating heater. 	
The two diagrams show how cement and concrete for building are made. 	
These are mixed in a concrete mixer, a large rotating cylinder that tapers towards the top.	
They make clear the different stages in the processes and the equipment and materials used.	
This mixture is then fed through a grinder, where it is ground into cement, and finally packed into sacks.	
We can see that cement production is a rather more complex process in terms of the equipment required and the number of stages in the process – four, excluding packing, 	
while concrete production is a one-stage process and requires only one piece of equipment, the concrete mixer, although four different materials are needed.	

Concrete production requires four raw materials: 15% cement, 10% water, 25% sand, and 50% gravel. 	
In the cement production process, two raw materials, cement and clay, are crushed and mixed together and then passed through a rotating heater. 	
The two diagrams show how cement and concrete for building are made. 	
These are mixed in a concrete mixer, a large rotating cylinder that tapers towards the top.	
They make clear the different stages in the processes and the equipment and materials used.	
This mixture is then fed through a grinder, where it is ground into cement, and finally packed into sacks.	
We can see that cement production is a rather more complex process in terms of the equipment required and the number of stages in the process – four, excluding packing, 	
while concrete production is a one-stage process and requires only one piece of equipment, the concrete mixer, although four different materials are needed.	
The two diagrams show how cement and concrete for building ________(make) . They make clear the different stages in the processes and the equipment and materials ______(use).
In the cement production process, two raw materials, cement and clay, _______(crush)  and ________(mix) together and then ________(pass) through a rotating heater. This mixture _________(then/ feed) through a grinder, where it ___________(grind) into cement, and finally __________(pack) into sacks.
Concrete production _________(require) four raw materials: 15% cement, 10% water, 25% sand, and 50% gravel. These ______________(mix) in a concrete mixer, a large rotating cylinder that tapers towards the top.
We can __________(see) that cement production is a rather more complex process in terms of the equipment required and the number of stages in the process – four, excluding packing, while concrete production is a one-stage process and _____________(require) only one piece of equipment, the concrete mixer, although four different materials ____________(need).

The two diagrams show how cement and concrete for building ________(make) . They make clear the different stages in the processes and the equipment and materials ______(use).
In the cement production process, two raw materials, cement and clay, _______(crush)  and ________(mix) together and then ________(pass) through a rotating heater. This mixture _________(then/ feed) through a grinder, where it ___________(grind) into cement, and finally __________(pack) into sacks.
Concrete production _________(require) four raw materials: 15% cement, 10% water, 25% sand, and 50% gravel. These ______________(mix) in a concrete mixer, a large rotating cylinder that tapers towards the top.
We can __________(see) that cement production is a rather more complex process in terms of the equipment required and the number of stages in the process – four, excluding packing, while concrete production is a one-stage process and _____________(require) only one piece of equipment, the concrete mixer, although four different materials ____________(need).

Answer	

The two diagrams show how cement and concrete for building are made. 
They make clear the different stages in the processes and the equipment and materials used.
In the cement production process, two raw materials, cement and clay, are crushed and mixed together and then passed through a rotating heater. This mixture is then fed through a grinder, where it is ground into cement, and finally packed into sacks.
Concrete production requires four raw materials: 15% cement, 10% water, 25% sand, and 50% gravel. These are mixed in a concrete mixer, a large rotating cylinder that tapers towards the top.
We can see that cement production is a rather more complex process in terms of the equipment required and the number of stages in the process – four, excluding packing, while concrete production is a one-stage process and requires only one piece of equipment, the concrete mixer, although four different materials are needed.