Building Materials (SECTION 2)

Question 1

1. The rocks in which argil (or clay) predominates, are called:

A. siliceous rocks

B. argillaceous rocks

C. calcareous rocks

D. igneous rocks

Answer 1

ARGILLACEOUS ROCKS

Question 2

2. A badly mixed cement concrete results in:

A. Segregation

B. Bleeding

C. Honeycombing

D. none of these

Answer 2

HONEYCOMBING

Question 3

3. Pick up the correct statement regarding low-heat cement from the following:

A. It possesses less compressive strength

B. Its initial setting time is about one hour

C. Its final setting time is about 10 hours

D. It is mainly used for mass concrete work

E. All of the above

Answer 3

ALL OF THE ABOVE

Question 4

4. Chemically, marble is known as:

A. metamorphic rock

B. argillaceous rock

C. calcareous rock

D. siliceous rock

Answer 4

CALCAREOUS ROCK

Question 5

5. Inner part of a timber log surrounding the pith, is called:

A. Sapwood

B. cambium layer

C. heartwood

D. none of these

Answer 5

HEARTWOOD

Question 6

6. The filler used in plastic bitumen is:

A. shale powder

B. talc powder

C. asbestos powder

D. plastic powder

E. none of these

Answer 6

ASBESTOS POWDER

Question 7

7. Resins are:

A. not soluble in water

B. soluble in spirit

C. used in varnishes

D. left behind on evaporation of oil

E. all of the above

Answer 7

ALL OF THE ABOVE

Question 8

8. Refractory bricks are used for:

A. retaining walls

B. columns

C. piers

D. combustion chambers

Answer 8

COMBUSTION CHAMBERS

Question 9

9. Expanded metal is:

A. manufactured from steel sheets

B. used for reinforced concrete in road pavements

C. measured in terms of SWM (short-way mesh) and LWM (long-way mesh)

D. all of the above

Answer 9

ALL OF THE ABOVE

Question 10

10. The rock generally used for roofing is:

A. Granite

B. Basalt

C. Slate

D. Pumice

Answer 10

SLATE

Question 11

11. A piece of sawn timber whose cross-sectional dimensions exceed 5 cm, in one direction and 20 cm in the other direction, is called a:

A. Cant

B. Deal

C. Baulk

D. strip

Answer 11

BAULK

Question 12

12. Quick lime (or caustic lime):

A. is obtained by the calcination of pure limestone

B. has a great affinity to moisture

C. is amorphous

D. All of the above

Answer 12

ALL OF THE ABOVE

Question 13

13. Pick up the correct statement from the following:

A. soft stones are required for carving

B. light stones are required for arches

C. hard stones are required to stand high pressure

D. All of the above

Answer 13

ALL OF THE ABOVE

Question 14

14. Name the type of cement from the following for canal linings:

A. sulphate-resisting cement

B. rapid hardening cement

C. quick setting cement

D. pozzuolana cement

Answer 14

SULPHATE-RESISTING CEMENT

Question 15

15. Mastic asphalt is generally used for:

A. damp proof course

B. waterproof layer

C. partition walls

D. both (a) and (b)

Answer 15

BOTH (A) AND (B)

Question 16

16. Black marble is generally found in the district of:

A. Jodhpur

B. Jaipur

C. Jabalpur

D. Jaisalmer

E. Pune

Answer 16

JAIPUR

Question 17

17. The most fire-resistant paints are:

A. enamel paints

B. aluminum paints

C. asbestos paints

D. cement paints.

Answer 17

ASBESTOS PAINTS

Question 18

18. If P is the percentage of water required for normal consistency, water to be added for determination of initial setting time, is:

A. 0.70 P

B. 0.75 P

C. 0.80 P

D. 0.85 P

E. 0.90 P

Answer 18

0.85 P

Question 19

A pug mill is used for:
A. softening brick earth

B. molding brick earth

C. tempering brick earth

D. providing brick earth

E. all of the above

Answer 19

TEMPERING BRICK EARTH

Question 20

A good brick earth should contain:
A. about 20% to 30% of alumina

B. about 50% to 60% of silica

C. not more than 5% of lime

D. about 5 to 6% of oxide of lime

E. All of the above

Answer 20

ALL OF THE ABOVE