1. Which is/are the important raw material(s) required in cement industry?
A. Gypsum and Clay
B. Clay
C. Limestone and Clay
D. Limestone
2. Which type of fire extinguisher is used for petroleum fire?
A. Powder type
B. Liquid type
C. Soda acid type
D. Foam type
3. Which of the following is commonly called a ‘polyamide’?
A. Terylene
B. Nylon
C. Rayon
D. Orlon
4. Epoxy resins are used as
A. detergents
B. insecticides
C. adhesives
D. moth repellents
5. Detergents used for cleaning clothes and utensils contain?
A. bicarbonates
B. bismuthates
C. sulphonates
D. nitrates