CIVIL ENGINEERING MCQs

1. A mixture of cement, gravel, coarse sand and water is called
(a) mortar
(b) concrete
(c) slurry
(d) hardner
Ans. (b)

2. RCC is
(a) the concrete having an iron framework inside it as a support
(b) the crushed cement in which more gravel is added
(c) prepared by adding calcium chloride to the limestone and calcium silicate
(d) none of the above
Ans. (a)

3. The process of making soap by the hydrolysis of fats and oils with alkalis is called
(a) hydrolysis
(b) saponification
(c) esterification
(d) none of the above
Ans. (b)

4. The soap can be hardened by
(a) adding sodium carbonate or sodium silicate during its manufacture
(b) adding sodium chloride
(c) adding potassium hydroxide
(d) adding animal fat and coconut oil
Ans. (a)

5. Endoscope is made up of
(a) glass wool
(b) optical fibres
(c) optical glass
(d) lead crystal glass
Ans. (b)

6. The plastics which soften upon being heated but regains all its original properties on
cooling are known as
(a) thermoplastics
(b) thermosetting plastics
(c) thermoelastic
(d) cellulose
Ans. (a)

7. Which of the following is not a thermoplastic polymer?
(a) Nylon
(b) PVC
(c) Polythene
(d) Bakelite
Ans. (d)

8. Match the following:
I II
(A) Heat resistant 1. Used as insulating
Glass material in oven
(B) Glass wool 2. Useful as sun shield
(C) Laminated glass 3. Borosilicate glass
(D) Photochromatic 4, Used in bullet proof
glass screens
A B C D
(a) 2 4 1 3
(b) 3 1 4 3
(c) 3 1 4 2
(d) 3 2 1 4
Ans. (c)

9. Limestone on heating gives
(a) washing soda
(b) plaster of Paris
(e) quicklime
(d) slaked lime
Ans. (c)

10. Bleaching powder is
(a) CaO2C1
(b) CaOCl2
(c) CaC1O2
(d) CaC12 + O2
Ans. (b)

11. Baking powder contains Sodium Hydrogen Carbonate and
(a) tartaric acid
(b) sodium carbonate
(c) calcium chloride
(d) acetic acid
Ans. (a)

12. Plaster of Paris is obtained by heating
(a) gypsum
(b) limestone
(c) sodium carbonate
(d) calcium sulphate
Ans. (a)

14. The common name of sodium bicarbonate is
(a) lime
(b) baking powder
(c) baking soda
(d) washing soda
Ans. (b)

14. Soda Acid for extinguisher contains
(a) sodium carbonate and nitric acid
(b) sodium hydrogen carbonate and sulphuric acid
(c) sodium carbonate and carbonic acid
(d) sodium chloride and sulphuric acid
Ans. (b)

15. Efflorescence is shown by
(a) bleaching powder
(b) baking soda
(c) washing soda
(d) plaster of Paris
Ans. (c)

16. Slaked lime reacts with chlorine to give
(a) baking soda
(b) washing soda
(c) bleaching powder
(d) cement
Ans. (c)

17. The main constituent of cement is
(a) Si02
(b) CaO
(c) CaSO4
(d) Al203
Ans. (a)

18. Sodium Carbonate is prepared on large scale by
(a) Solvay’s process
(b) Beckmann’s plants
(c) Hesenclover plant
(d) adding water to lime
Ans. (a)

19. Name a compound which hardens on wetting with water.
(a) Calcium sulphate decahydrate
(b) Calcium sulphur hemihydrates
(c) Calcium sulphate
(d) Hydrated calcium sulphate
Ans. (b)

20. The real bleaching agent present in bleaching powder is
(a) chlorine
(b) oxygen
(c) CaO
(d) none of the above
Ans. (a)