If you are proportioning a concrete mix with a water-to-cement ratio of .40 and know that you are using 320 pounds of water per cubic yard, how much cement would you need to use?

Question

If you are proportioning a concrete mix with a water-to-cement ratio of .40 and know that you are using 320 pounds of water per cubic yard, how much cement would you need to use?

BlackTom AI · Accepted Answer

The problem asks for the cement content given a water-to-cement ratio of 0.40 and a known water amount of 320 pounds per cubic yard.
Option 1: 800 lbs. If water (320 lb) divided by cement equals 0.40, then cement = 320 / 0.40 = 800 lb. This matches the given ratio and the provided water quantity.
Option 2: 320 lbs. This would give a water-to-cement ratio of 320 / 320 = 1.0, not 0.40, so it misstates the relationship between water and cement.
Option 3: 640 lbs. This would yield a ratio of 320 / 640 = 0.5, which is higher than the specified 0.40, making it inconsistent with the given ratio.
Option 4: cannot be determined. Since the problem provides a clear water quantity and the required ratio, cement amount can be calculated directly, so this choice is incorrect.
In summary, using the formula w/c = water / cement and solving for cement with water = 320 lb and w/c = 0.40 leads to cement = 800 lb, validating Option 1 as the correct value.

2258-1_20CVE2003C003 Quiz 3

If you are proportioning a concrete mix with a water-to-cement ratio of .40 and know that you are using 320 pounds of water per cubic yard, how much cement would you need to use?

查看解析

登录即可查看完整答案

类似问题

In a consumer society, many adults channel creativity into buying things

Economic stress and unpredictable times have resulted in a booming industry for self-help products

People born without creativity never can develop it

A product has a selling price of $20, a contribution margin ratio of 40% and fixed cost of $120,000. To make a profit of $30,000. The number of units that must be sold is: Type the number without $ and a comma. Eg: 20000

Which of the following statement regarding cost is correct:

Under the assumptions used in cost-volume-profit analysis, as the activity increases:

The CVP and break-even analysis are supported by a range of important assumptions. Which of the following is not an assumption of the CVP:

The break-even point is that at which:

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单