Batching of Concrete

Q. The volume of one bag of cement weighing 50 kg is:

1. $0.05m^3$
2. $0.0245m^3$
3. $0.0345m^3$
4. $0.0445m^3$

Q. For batching $1:3:6$ concrete mix by volume, the ingredients required per bag of $50kg$ cement, are :

1. $70$ liters of sand and $120$ liters of aggregates
2. $70$ kg of sand and $140$ liters of aggregates
3. $105$ liters of sand and $140$ liters of aggregates
4. $105$ liters of sand and $210$ liters of aggregates

Q. A cement bag contains 0.035 cubic meters of cement by volume. How many bags will one tonnes (1000 kg) of cement comprise?

1. 16
2. 17
3. 18
4. 20

Q. The yield of concrete per bag of cement for a concrete mix proportion of $1:1.5:3$ (with adopting $\frac{2}{3}$ as the coefficient) is

1. $0.090m^3$
2. $0.128m^3$
3. $0.135m^3$
4. $0.146m^3$

Q. ..... is the quantity of fine aggregate required per 50 kg of cement of M-15 (1 : 2 : 4) grade of concrete.

1. 0.340 $m^3$
2. 0.053 $m^3$
3. 0.035 $m^3$
4. 0.070 $m^3$

Q. What is the amount of water required for a workable RC of mix 1 : 2 : 4 by weight when w/c ratio is 0.6 and unit weight of concrete is 2400 kg/$m^3$?

1. 165 L
2. 205 L
3. 245 L
4. 285 L

Q. The batching accuracy (in %) of water used for mixing concrete should be within:

1. $\pm 2$
2. $\pm 1$
3. $\pm 5$
4. $\pm 3$

Q. Consider the following particulars in respect of a concrete mix design:
$\begin{array}{ccc}& \text{Weight}& \text{Specific Gravity}\\ \text{Cement}& 400\frac{kg}{m^3}& 3.2\\ \text{Fine aggregates}& -& 2.5\\ \text{Coarse}& 1040\frac{kg}{m^3}& 2.6\\ \text{aggregates}& & \\ \text{Water}& 200\frac{kg}{m^3}& 1.0\end{array}$
What shall be the weight of the fine aggregates?

1. $520\frac{kg}{m^3}$
2. $570\frac{kg}{m^3}$
3. $690\frac{kg}{m^3}$
   
4. $1000\frac{kg}{m^3}$

Q. Consider the following data for concrete with mild exposure:
Water/cement ratio $=0.50$
Water $=191.6\text{liter}$
The required cement content will be

1. $561km/m^3$
2. $472km/m^3$
3. $383kg/m^3$
4. $294kg/m^3$

Q. The minimum cement content $\left(\frac{kg}{m^3}\right)$ for a pre-specified strength of concrete (using standard notations) premised on 'free water-cement ratio' will be as

1. $1-\frac{C}{1000S_C}-\frac{W}{1000}$
2. $\frac{\text{Water content}}{\text{Water cement ratio}}$
3. $\text{Water content}\times \text{Water cement ratio}$
4. $\frac{100F}{C+F}$