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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. At the same mean velocity, the ratio of head loss per unit length for a sewer pipe flowing full to that for the same pipe flowing half full would be :
Options- A. 2.0
- B. 1.63
- C. 1.00
- D. 0.61 Discuss
- 2. Pick up the cohesive soil from the following:
Options- A. Red earth
- B. Clay
- C. Black cotton soil
- D. Compacted ground. Discuss
- 3. Kaolin is chemically classified as
Options- A. metamorphic rock
- B. argillaceous rock
- C. calcareous rock
- D. silicious rock. Discuss
- 4. A part of the slab may be considered as the flange of the T-beam if
Options- A. flange has adequate reinforcement transverse to beam
- B. it is built integrally with the beam
- C. it is effectively bonded together with the beam
- D. all the above. Discuss
- 5. Carbonates in water produce
Options- A. temporary hardness
- B. permanent hardness
- C. acidity
- D. alkanity. Discuss
- 6. At lower culmination, the pole star moves
Options- A. eastward
- B. westward
- C. northward
- D. southward. Discuss
- 7. While designing a stair, the product of rise and going is approximately kept equal to
Options- A. 350
- B. 420
- C. 450
- D. 500
- E. 600. Discuss
- 8. The rock which is not calcareous, is :
Options- A. lime stone
- B. macl
- C. chalk
- D. laterite
- E. none of these. Discuss
- 9. Tacking rivets in compression plates not exposed to the weather, have a pitch not exceeding 300 mm or
Options- A. 16 times the thickness of outside plate
- B. 24 times the thickness of outside plate
- C. 32 times the thickness of outside plate
- D. 36 times the thickness of outside plate. Discuss
- 10. Expansion joints are provided if the length of concrete structures exceeds
Options- A. 10 m
- B. 15 m
- C. 15 m
- D. 35 m
- E. 45 m Discuss
More questions
Correct Answer: 1.63
Correct Answer: Black cotton soil
Correct Answer: argillaceous rock
Correct Answer: all the above.
Correct Answer: temporary hardness
Correct Answer: eastward
Correct Answer: 420
Correct Answer: laterite
Correct Answer: 32 times the thickness of outside plate
Correct Answer: 45 m
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