Cement and Its uses

Q. Cement, water, sand and gravel are mixed to form ______.

1. concrete
2. gypsum
3. Portland cement
4. rocks

Q. When water is added to a cement, it forms a semi solid mixture. On drying, it sets to a hard substance.

1. True
2. False

Q. A thick coating of a paste of Plaster of Paris (POP) is applied over the bandage on a fractured bone. It becomes hard on drying to keep the fractured bone immobilized. Can the change in POP be reversed?​

Q. Why does the rapid hardening cement harden faster than the normal cement?

1. Due to different composition of limestone.
2. Due to different composition of gypsum.
3. Due to different composition of sand.
4. Due to different composition of clay.

Q. Identify the materials that are constructed using concrete.

1. Pillars
2. Pipes
3. Machines
4. Blocks

Q. Cement is generally stored in bags.

1. airtight
2. open
3. semipermeable

Q. Arrange the processes involved in the preparation of Portland cement in the correct sequence.

1. Batch mixing
2. Clinkering
3. Cooling
4. Milling
5. Packaging

Q. In 1824 ___, a mason in England synthesised cement

Q. A mortar is a mixture of cement along with:

1. gravel and water
2. sand and water
3. sand and gravel
4. water and metal

Q.

Cement is a mixture of silicates and aluminates of:

1. calcium

2. aluminium

3. magnesium

4. sodium

Q. Who invented portland cement?

1. Alexander Fleming
2. Charles Babbage
3. Joseph Priestly
4. Joseph Aspdin

Q.

The time taken for setting of cement depends upon the quantity of:

1. gypsum

2. silica

3. limestone

4. alumina

Q.

The main component of cement is________.

1. lime

2. silica

3. alumina

4. magnesia

Q. Reinforced Cement Concrete finds its application in constructing:

1. dams
2. water tanks
3. pipes
4. pillars
5. drainage canals
6. marble
7. pots
8. tiles