| 1. |
Mixing a typical, small batch of concrete will take about 10-30 minutes overall.
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10 – 30 minutes |
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30 minutes – 1 hour |
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1 hour- 2 hours |
| 2. |
Wet concrete has caustic, abrasive, and skin drying properties. These properties can cause skin irritation, severe chemical burns (also known as “cement burns”) and eye injury. |
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Can cause |
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Cannot cause |
| 3. |
Avoid contact whenever possible and wash exposed skin areas promptly with water. If any cement or concrete gets into the eyes, rinse immediately and repeatedly with water and receive prompt medical attention. |
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True |
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False |
| 4. |
Which one of the following you need for making and mixing concrete
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Portland cement, sand, water |
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Portland cement, sand, gravel, water, shovel, buckets, PPE ( personal protection equipment) |
| 5. |
The following diagram depicts the 1:2:3 ratio for mixing a batch of concrete.
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True |
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False |
| 6. |
Creating the Volcano shape is for: |
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So the water can be added smoothly |
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It creates a space for the water where the rest of the mix will keep it from running out. |
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When the water is added, there action at the surface of the volcano acts as a barrier so that water doesn’t penetrate through. |
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All of the above |
| 7. |
There is no specific amount of water that should be added. The water amount will vary from site to site and also based on the characteristics of the gravel. As a starting amount for the volume of water, It is recommend adding approximately half of a bucket of water, and then adding water in small amounts until the desired consistency is reached. |
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True |
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False |
| 8. |
When mixing the water, since you want all of the concrete to be a good mixture, dry mixture outside of the crater is added to the rim to build up the sides. Basically, use your shovel to scoop the dry mix on the outside right into and around the water. There will come a time when the water starts seeping out and that’s when you know you really need to start moving. Mix the concrete by taking a scoopful of water and dry mix and flipping it over onto another part of the mix. Continue this motion while moving around the mix in a circle.
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True |
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False |
| 9. |
When placing the concrete, when it has been consistently mixed. You need to place it right away to ensure that it does not start hardening in the wrong spot. You would use your bucket, a wheel barrow, or something similar to transport the concrete where you need it to be. Simply use your shovel to fill whatever you choose, bring it to your site, and carefully pour it wherever you need it.
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True |
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False |
| 10. |
After you have placed all the concrete, rinse off your shove land bucket using a hose or another source of water. Any wet concrete will end up drying and sticking to the tool. This solid concrete will be very hard to remove once it is hard. |
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True |
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False |
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