RCC Structures Design problems
- 1. In case the factor of safety against sliding is less than 1.5, a portion of slab is constructed downwards at the end of the heel slab, which is known as
Options- A. a key
- B. a cut-off wall
- C. a rib
- D. all the above. Discuss
Correct Answer: all the above.
- 2. For normal cases, stiffness of a simply supported beam is satisfied if the ratio of its span to its overall depth does not exceed
Options- A. 10
- B. 15
- C. 20
- D. 25
- E. 30 Discuss
Correct Answer: 20
- 3. Columns may be made of plain concrete if their unsupported lengths do not exceed their least lateral dimension
Options- A. two times
- B. three times
- C. four times
- D. five times
- E. six times. Discuss
Correct Answer: four times
- 4. The allowable tensile stress in mild steel stirrups, reinforced cement concrete, is
Options- A. 1400 kg/cm2
- B. 190 kg/cm2
- C. 260 kg/cm2
- D. 230 kg/cm2 Discuss
Correct Answer: 1400 kg/cm2
- 5. A pile weighing W1 kg penetrates S metres with its last blow. If W2 is the weight of the hammer having a drop of H metres, the pile can carry a maximum external load
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
- 6. Long and short spans of a two way slab are ly and lx and load on the slab acting on strips parallel to lx and ly be wx and wy respectively. According to Rankine Grashoff theory
Options- A.
- B.
- C.
- D.
- E. none of these. Discuss
Correct Answer:
- 7. The minimum head room over a stair must be
Options- A. 200 cm
- B. 205 cm
- C. 210 cm
- D. 200 cm
- E. 230 cm Discuss
Correct Answer: 210 cm
- 8. An R.C.C. beam of 6 m span is 30 cm wide and has a lever arm of 55 cm. If it carries a U.D.L. of 12 t per m and allowable shear stress is 5 kg/cm2, the beam
Options- A. is safe in shear
- B. is safe with stirrups
- C. is safe with stirrups and inclined bars
- D. needs revision of section Discuss
Correct Answer: needs revision of section
- 9. The diameter of the column head support a flat slab, is generally kept
Options- A. 0.25 times the span length
- B. 0.25 times the diameter of the column
- C. 4.0 cm larger than the diameter of the column
- D. 5.0 cm larger than the diameter of the column
- E. none of these. Discuss
Correct Answer: 0.25 times the span length
- 10. According to I.S.: 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is kept less than
Options- A. 5 cm
- B. 10 cm
- C. 15 cm
- D. 20 cm
- E. 25 cm Discuss
Correct Answer: 15 cm
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