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- Question
3.0 ml of raw sewage is diluted to 300 ml. The D.O. concentration of the diluted sample at the beginning of the test was 8 mg/l. After 5 day-incubation at 20°C, the DO. concentration was 5 mg/l. The BOD of raw sewerage is
Options- A. 100 mg/l
- B. 200 mg/l
- C. 300 mg/l
- D. 400 mg/l.
- Correct Answer
- 300 mg/l
- 1. The rise and fall method of reduction of levels, provides a check on
Options- A. back sights
- B. fore sights
- C. intermediate sights
- D. all of these. Discuss
- 2. With a percentage increase of carbon in steel, decreases its
Options- A. strength
- B. hardness
- C. brittleness
- D. ductility. Discuss
- 3. Effective length of a column effectively held in position and restrained in direction at one end but neither held in position nor restrained in direction at the other end, is
Options- A. L
- B. 0.67 L
- C. 0.85 L
- D. 1.5 L
- E. 2 L Discuss
- 4. In chain surveying tie lines are primarily provided
Options- A. to check the accuracy of the survey
- B. to take offsets for detail survey
- C. to avoid long offsets from chain lines
- D. to increase the number of chain lines. Discuss
- 5. In rolled steel beams, shear force is mostly resisted by
Options- A. web only
- B. flanges only
- C. web and flanges together
- D. none of these. Discuss
- 6. The quantity of water retained by the sub-soil against gravity, is known
Options- A. yield
- B. porosity
- C. specific yield
- D. specific retention
- E. none of these. Discuss
- 7. Infiltration capacity of soil depends upon
Options- A. number of voids present in the soil
- B. shape and size of soil particles
- C. arrangement of soil particles
- D. compaction of the soil particles
- E. all the above. Discuss
- 8. Pick up the commonly adopted geophysical method in civil engineering from the following :
Options- A. the seisomic method
- B. electrical resistivity method
- C. gravitational method
- D. magnetic method
- E. both (a) and (b) of the above. Discuss
- 9. According to IS: 800-1962, the coefficient of expansion of steel per degree centigrade per unit length, is taken as
Options- A. 0.000008
- B. 0.000010
- C. 0.000012
- D. 0.000014
- E. 0.000016 Discuss
- 10. If x% is the gradient of an alignment and y% is the gradient after proper superelevation along a curved portion of a highway, the differential grade along the curve, is
Options- A. (x + y)%
- B. (x - y)%
- C. (y - x)%
- D. (x x y)%
- E. (y + x)% Discuss
More questions
Correct Answer: all of these.
Correct Answer: ductility.
Correct Answer: 2 L
Correct Answer: to avoid long offsets from chain lines
Correct Answer: web only
Correct Answer: specific retention
Correct Answer: all the above.
Correct Answer: both (a) and (b) of the above.
Correct Answer: 0.000012
Correct Answer: (y - x)%
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