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- Question
A prestressed concrete rectangular beam of size 300 mm x 900 mm is prestressed with an initial prestressing force of 700 kN at an eccentricity of 350 mm at midspan. Stress at top of the beam due to prestress alone, in N/mm2 is
Options- A. 46 (tension)
- B. 2.59 (compression)
- C. zero
- D. 8.64 (compression)
- Correct Answer
- 46 (tension)
- 1. The self-cleansing velocity of water flowing through pipe lines, is
Options- A. 2 metres/sec
- B. 1 metre/sec
- C. 0.5 metre/sec
- D. 0.25 metre/sec. Discuss
- 2. The semi-infinite snow albedo is proportional to the square root of the grain radius :
Options- A. in the 0.2 to 0.4 ?m wave length region
- B. in the 0.4 to 0.8 ?m wave length region
- C. in the 0.8 to 1.2 ?m wave length
- D. None of these Discuss
- 3. To avoid the tendency of separation of liquid flow, the most suitable ratio of the diameters of the throat and the pipe, is
Options- A. 1/4 to 1/8
- B. 1/3 to 1/2
- C. 1/2 to 3/4.
- D. none of these. Discuss
- 4. The efficiency of a pump may be taken as
Options- A. 0.55
- B. 0.60
- C. 0.65
- D. 0.70 Discuss
- 5. A wooden block fixed on back side of a door frame on its post, is known as
Options- A. cleat
- B. stop
- C. horn
- D. none of these. Discuss
- 6. If a 30 m chain diverges through a perpendicular distance d from its correct alignment, the error in length, is
Options- A.
- B.
- C.
- D.
- E.
.
Discuss
- 7. In sewers the highest non-scouring velocity is achieved in
Options- A. glazed bricks sewers
- B. cast iron sewers
- C. cement concrete sewers
- D. stone ware sewers. Discuss
- 8. The difference in gradients after full super-elevation and the initial alignment of a road, is known as
Options- A. ruling gradient
- B. rising gradient
- C. compensated gradient
- D. differential gradient
- E. none of these. Discuss
- 9. The radius of influence is
Options- A. radius of the main well
- B. distance from the wall of main well to the point of zero draw down
- C. distance from the centre of main well to the point of zero draw down
- D. none of these. Discuss
- 10. The initial setting time of lime-pozzolana, is
Options- A. 30 minutes
- B. 60 minutes
- C. 90 minutes
- D. 120 minutes. Discuss
More questions
Correct Answer: 2 metres/sec
Correct Answer: in the 0.4 to 0.8 ?m wave length region
Correct Answer: 1/3 to 1/2
Correct Answer: 0.65
Correct Answer: stop
Correct Answer:
Correct Answer: glazed bricks sewers
Correct Answer: differential gradient
Correct Answer: distance from the centre of main well to the point of zero draw down
Correct Answer: 120 minutes.
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