Construction and Building Materials Mock Test 9

10%

Question 1 of 10

1. Which of the following is not true about pozzuolana cement?

Less heat is evolved during its setting

Pozzuolana cement can resist the action of sulphates

It imparts plasticity to the mortar prepared from it

Pozzuolana cement possesses a very low tensile strength

Question 1 of 10

Question 2 of 10

2. In the preparation of clay for manufacturing tiles, after making the selected clay free from impurities, it is converted into fine powder in a __________

Pugmill

Continuous kiln

Ball mill

Intermittent kiln

Question 2 of 10

Question 3 of 10

3. Which of the following statements about gypsum is not correct?

The solubility of gypsum in water is very poor

Gypsum in insoluble in sulphuric acid

The final setting time of gypsum is 30 minutes

Gypsum is insoluble in hydrochloric acid

Question 3 of 10

Question 4 of 10

4. Percentage of impurities in limestones should not exceed ________ for preparing fat lime.

15%

10%

Question 4 of 10

Question 5 of 10

5. Percentage of alumina in good brick earth should be about ________

35-40%

20-30%

5-10%

45-60%

Question 5 of 10

Question 6 of 10

6. Which of the following is added to the glass in order to make its colour green?

Chromium sesquioxide

Cobalt oxide

Magnesium dioxide

Sodium oxide

Question 6 of 10

Question 7 of 10

7. The presence of chromium oxide in cement imparts _________ colour.

Green

Red

Orange

Blue

Question 7 of 10

Question 8 of 10

8. Clay predominates in calcareous materials while calcium carbonate predominates in argillaceous materials.

False

True

Question 8 of 10

Question 9 of 10

9. Hydraulic lime resembles natural cement with about __________ of clay.

30%

20%

60%

15%

Question 9 of 10

Question 10 of 10

10. ________________ is used to excavate the trenches of width from 250 mm to 450 mm and depth 4 m with accuracy and speed.

Ripper

Ditcher

Rooter

Scarifier

Question 10 of 10