1. What is the size of a traditional brick?
The size of traditional brick is 230 X 115 X 75 mm
2. What is thickness of the brick masonry and stone masonry?
The thickness of brick masonry is 230 / 115 / 75 mm and stone masonry is 345 / 450 mm.
3. How many no. of hinges are provided for a door shutter?
Three no. of hinges are provided for a door shutter.
4. How much thickness of plastering will be given for internal and external surface?
The thickness of the plastering will be 15mm for internal and 15 mm / 25 mm for external.
5. What is the height of wash basin?
The height of wash basin is 810 mm from finished floor level.
6. What are the depth and projection of the sun-shade for any Window of a building in normal climatic conditions?
600 mm is the projection generally given for the sun-shades in normal climatic conditions.
7. What is the height of mirror fixed above the wash basin?
The center line of the mirror will be fixed at 1.5 m level from finished floor level.
8. What are the important types of brick bonds?
There are two types of brick bonds which are usually practiced
a. English bond
b. Flemish bond
9. What is a Frog in brick and why is it provided?
It is a depression on the top face of a brick. Frog provides recess for the mortar which on setting forms a key and prevents the displacement of brick above.
10. What is the Riser of steps and how much it should be?
Riser is a vertical distance of steps between the upper surface of the successive treads and it should be min. 150 & max. 190 mm.
11. What is “site”?
A piece of land enclosed by definite boundaries.
12. What are Header and Stretcher in masonry?
a. Header is a full brick / stone, which is laid with its length perpendicular to the face of the wall.
b. Stretcher is a full brick / stone, which is laid with its length parallel to the face of the wall.
13. Why is toothing provided in the brick masonry?
Bricks or stones left projecting in alternate courses for the purpose of bonding future masonry work.
14. What is the minimum cross-section of a wooden door frame?
100 x 65 mm is the minimum cross-section of a wooden door frame.
15. What is the minimum cover thickness specified for various elements of RC structure?
Minimum cover thickness specified depends on exposure condition of the concrete in addition to the type of elements. In mild exposure conditions, the minimum cover thickness specified is
a. Slab – 20 mm
b. Beam – 25 mm
c. Column – 40 mm
d. Footing – 50 mm
16. What is the Plastering Thickness adopted?
Plastering thicknesses adopted are Inner Side 15 mm, outer side 20 mm, ceiling 12 mm thick.
17. Why is reinforcement placed in Concrete?
Reinforcement is placed in Concrete to take tensile loads due to bending and direct tension.
18. What is the nominal size of Modular Bricks and Conventional Bricks?
a. Nominal size of Modular Clay Brick is 200 mm x 100 mm x 100 mm
b. Nominal size of Conventional Clay Brick is 230 mm x 115 mm x 75 mm
19. What is the purpose of giving mild steel bars as reinforcement in concrete?
In reinforced cement concrete important aspect is to have good bond between reinforcing bars and the concrete for monolithic behavior of the material. Mild steel has coefficient of thermal expion similar to that of concrete thus they maintain good bond in case of decrease and increase in temperature.
20. What is the minimum grade of concrete used in RCC?
M20 Concrete is the minimum grade of concrete to be used in RCC.
21. What do you mean by PCC 1:3:6?
PCC 1:3:6 is Plain Cement Concrete of proportion 1-Cement, 3-Sand & 6-Aggregate (stone chips).
22. What is the mortar mix proportion for 1 Brick thick wall and Half Brick thick wall?
a. Mortar proportion for 1 Brick thick wall is 1:6
b. Mortar proportion for 1/2 Brick thick wall is 1:4
23. What do you mean by M20 Concrete?
In M20 Concrete, M stands for Mix and 20 stands for characteristic compressive strength i.e. 20 N/mm2
24. What is RCC and what is PCC?
RCC is Reinforced Cement Concrete and PCC is Plain Cement Concrete
25. What do you mean when we say 43 grade cement?
When a cube of 70.6 mm of Cement – Sand mix in proportion of 1:3 (1- Cement & 3- Sand) is tested in compression testing machine after 28 days of curing in water yields compressive strength 43 N/mm2.
26. What are the instruments used for marking any structure on ground?
Following are the instruments used for marking structure on ground.
a. Theodolite
b. Dumpy Level
c. Total station
27. What are the types of floor finishes?
Following are the type of floors finishes adopted.
a. Mosaic Flooring
b. Marble Flooring
c. Granite Flooring
d. Ironite Flooring
e. IPS Flooring
f. Acid resistant tile Flooring
g. Tiled flooring
h. Vitrified Flooring etc.
d. Ironite Flooring
e. IPS Flooring
f. Acid resistant tile Flooring
g. Tiled flooring
h. Vitrified Flooring etc.
28. What is the roofing sheet material used?
Following are the roofing sheet material used:
a. AC Sheets
b. Polypropylene fibre reinforced Cement Sheets
c. FRP Sheets
d. Poly Carbonate sheets
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