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- Question
In a BOD test using 5% dilution of the sample (15 ML of sample and 285 mL of dilution water), dissolved oxygen values for the sample and dilution water blank bottles after five days incubation at 20°C were 3.80 and 8.80 mg/L. respectively. Dissolved oxygen originally present in the undiluted sample was 0.80 mg/L. The 5-day 20°C BOD of the sample is
Options- A. 116 mg/L
- B. 108 mg/L
- C. 100 mg/L
- D. 92 Mg/L
- Correct Answer
- 92 Mg/L
- 1. A soil not fully consolidated under the existing over-burden pressure, is called
Options- A. pre-consolidated
- B. normally consolidated
- C. under-consolidated
- D. none of these. Discuss
- 2. The total length (in km) of the existing National Highways in India is in the range of
Options- A. 15, 000 to 25, 000
- B. 25, 000 to 35, 000
- C. 35, 000 to 45, 000
- D. 45, 000 to 55, 000 Discuss
- 3. The position of a heavenly body on the celestial sphere can be completely specified by
Options- A. its altitude and azimuth
- B. its declination and hour angle
- C. its declination and right ascension
- D. all the above. Discuss
- 4. Offsets are measured with an accuracy of 1 in 40. If the point on the paper from both sources of error (due to angular and measurement errors) is not to exceed 0.05 cm on a scale of 1 cm = 20 m, the maximum length of offset should be limited to
Options- A. 14.14
- B. 28.28 m
- C. 200 m
- D. none of these. Discuss
- 5. An aquiclude is
Options- A. a non artesian aquifer
- B. an artesian acquifer
- C. a confined bed of impervious material between acquifers
- D. a large water body under ground. Discuss
- 6. A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The mechanical advantage of the lifting machine is
Options- A. 15
- B. 18
- C. 20
- D. 26. Discuss
- 7. Three forces which act on a rigid body to keep it in equilibrium. The forces must be coplanar and
Options- A. concurrent
- B. parallel
- C. concurrent parallel
- D. none of these. Discuss
- 8. The force which produces an acceleration of 1 m/sec2 in a mass of one kg, is called
Options- A. dyne
- B. Netwon
- C. joule
- D. erg. Discuss
- 9. Stress may be defined as
Options- A. force per unit length
- B. force per unit volume
- C. force per unit area
- D. none of these. Discuss
- 10. The diameter of transverse reinforcement of columns should be equal to one-fourth of the diameter of the main steel rods but not less than
Options- A. 4 mm
- B. 5 mm
- C. 6 mm
- D. 7 mm
- E. 8 mm Discuss
More questions
Correct Answer: under-consolidated
Correct Answer: 25, 000 to 35, 000
Correct Answer: all the above.
Correct Answer: 28.28 m
Correct Answer: a confined bed of impervious material between acquifers
Correct Answer: 20
Correct Answer: concurrent
Correct Answer: Netwon
Correct Answer: force per unit area
Correct Answer: 7 mm
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