Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of portland cement. The component of Portland cement which first hardens is

Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of portland cement. The component of Portland cement which first hardens is Correct Answer 5CaO . 3Al<sub>2</sub>O<sub>3</sub>

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Which type of cement is produced by grinding clinkers formed by calcining bauxite, lime, iron oxide with a little ferric oxide, silica magnesia, etc? (Note that alumina content in this type of cement should NOT be less than 32%.)
Three bags whose volumes are in the ratio of 3 : 5 : 7 are full of lime and silica. In the 1st bag the ratio of lime and silica is 5 : 1, in 2nd bag the ratio is 7 : 3 and in the 3rd bag the ratio is 3 : 4. All the three mixtures are mixed in another bag. Find the ratio of lime and silica in the final mixture.
Raw material purchased:
1st January, 600 units @ Rs. 12 per unit
12th January, 500 units @ Rs. 14 per unit
21st January, 300 units @ Rs. 13 per unit
Raw material issued for manufacture:
3rd January 300 units
5th January 124 units
15th January 250 units
16th January 300 units
Raw material returned to stores from manufacturing department on 14th January, 50 units. The material is issued on First-in-First out method.
The value of material remaining in store on 21st January will be:
This compound is conventionally used for the whitewashing of buildings. Which of the following statements is/are true about it. 1. It is obtained by treating quick lime with water. 2. It is produced when calcium carbide reacts with water. 3. It is one of the raw materials used for the manufacture of Portland cement. 4. It is called slaked lime and its chemical formula is Ca(OH)2. Select the correct answer using the code given below:
In the question below is given a statement followed by two courses of action numbered I and II. You have to assume everything given in the statement to be true and then decide which of the given/ suggested courses of action logically follows for pursuing. Statement: One of the problems of the public food- processing industry is the irregular supply of raw material to other industries also. Courses of Action:  The government should deregulate the supply of raw material for the food processing industry. The government should announce an attractive package to ensure regular supply of raw material. The producers of raw material are not getting a reasonable price
In the following question, two lists are given. List A contains types of “Soils” and List B contains the “Minerals” they are rich in. Match the two correctly and select the correct answer using the options given below.   List A List B  i. Alluvial soil a. Iron, Magnesia, Alumina ii. Black soil b. Iron oxide and Potash iii. Red soil c. Iron and Potash iv. Laterite Soil d. Potash and Lime
Which one of the following is the correct sequence of various stages of operating cycle of a manufacturing company?  1. Raw material conversion period, work-in-progress conversion period, Finished goods conversion period, Receivables conversion period 2. Raw material conversion period, work-in-progress conversion period, Creditors payment period, Receivables conversion period 3. Creditor payment period. Raw material conversion period, Receivables conversion period, work-in- progress conversion period 4. Raw material conversion period, Finished goods conversion period, work-in- progress conversion period. Receivables conversion period 
Statement : One of the problems facing the food processing industry is the irregular supply of raw material. The producers of raw material are not getting a reasonable price.

Courses of Action :
I. The government should regulate the supply of raw material to other industries also.
II. The government should announce an attractive package to ensure regular supply of raw material for food processing industry.
Eminently hydraulic lime is one in which the percentage of silica, alumina and iron oxide is
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