Building Construction

11. A stair should not have pitch more than

1. 25°
2. 30°
3. 40°
4. 50°

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12. A temporary rigid structure having platforms to enable masons to work at different stages of a building, is known as

1. Scaffolding
2. Dead shore
3. Raking shore
4. Under pinning

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13. A wall constructed to resist the pressure of an earth filling, is called

1. Retaining wall
2. Breast wall
3. Buttress
4. Parapet wall

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14. A wall constructed with stones to protect slopes of cuttings in natural ground from the action of weathering agents, is called

1. Retaining wall
2. Breast wall
3. Buttress
4. Parapet wall

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15. A wooden block fixed on back side of a door frame on its post, is known as

1. Cleat
2. Stop
3. Horn
4. None of these

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16. A wooden block hinged on post outside a door, is known

1. Cleat
2. Stop
3. Horn
4. None of these

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17. According to National Building Code, the hydrants in water mains is provided at minimum interval of

1. 50 m
2. 60 m
3. 75 m
4. 90 m

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18. According to Rankine's formula, minimum depth of foundations, is

1. (P/w) × [(1 + sin φ)/(1 - φ)]²
2. (P/w) × [(1 - sin φ)/(1 + φ)]²
3. (P/2w) × [(1 - sin φ)/(1 + φ)]²
4. (P/w) × [(1 + sin φ)/(1 - φ)]

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19. An arch constructed with finely dressed stones, is known

1. Ashlar arch
2. Rubble arch
3. Gauged arch
4. Axed arch

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20. An arch may fail due to

1. Uneven settlement of abutments
2. Sliding of voussoirs
3. Crushing of the material
4. All the above

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