Contents of green sand & their approximate per cent - Manufacturing Processes - 1

Q.  Match the following contents of green sand in Group 1 with their approximate per cent in Group 2.

1. Silica -------------------------- A. 5 to 10 per cent
2. Clay --------------------------- B. 2 to 5 per cent
3. Bentonite --------------------- C. 8 to 15 per cent
4. Coal dust --------------------- D. 7 to 8 per cent
5. Water -------------------------- E. up to 75 per cent
- Published on 03 Aug 15

a. 1-(E), 2-(C), 3-(B), 4-(A), 5-(D)
b. 1-(E), 2-(A), 3-(B), 4-(C), 5-(D)
c. 1-(C), 2-(D), 3-(B), 4-(A), 5-(E)
d. 1-(C), 2-(A), 3-(B), 4-(D), 5-(E)

ANSWER: 1-(E), 2-(C), 3-(B), 4-(A), 5-(D)

Related Content

 

    Discussion

  • Pankaj   -Posted on 26 Oct 15
    - Green sand can be defined as the sand in its natural or moist state.

    - It is a composition of silica, clay, bentonite, coal dust and water with their appropriate percentage.

    - The green sand consists of silica at its highest proportion of up to 75%. This higher percentage of silica in green sand helps in making sand refractory. Cohesiveness of sand gets destroyed with excess of silica.

    - Clay contents present in green sand are about 8 to 10% and remaining sand consists of 2 to 5% of bentonite, 5 to 10% of coal dust and 7 to 8% of water.

➨ Post your comment / Share knowledge


Enter the code shown above:

(Note: If you cannot read the numbers in the above image, reload the page to generate a new one.)
▲