Civil Engineering - UPSC Civil Service Exam Questions

11. 

Which one of the following is not essential to derive the formula used in constructing a synthetic unit hydrograph ?

A. Time to peak
B. peakflow
C. Inter flow
D. Time lease

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

12. 

In an aerial puhotogrammetric survey, if the exposure interval is 20 seconds to cover ground distance of 1000 m between exposures, what would be the ground speed of the aircraft ?

A. 90 km/hour
B. 120 km/hour
C. 150 km/hour
D. 180 km/hour

Answer: Option D

Explanation:

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13. 

The head over a 90° V-notch weir increases from 0.15 m to 0.3 m. The ratio of new discharge to the original discharge is, nearly equal to

A. 5.65
B. 1.42
C. 4.0
D. 2.62

Answer: Option A

Explanation:

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14. 

Consider the following statements with ragard to crack formation and its control:
1. The surface width of the crack should not, in general, exceed 0.30 mm for structures not subjected to aggressive environment.
2. When depth of web in a beam exceeds 750 mm, side face reinforcement @ 0.1 percent of web area should be provided on each face.
3. The nominal spacing of main bars in a slab should not exceed three times the effective depth of a solid slab or 300 mm, whichever is smaller.
Which of the statements given above is/are correct ?

A. 1 only
B. 1 and 2
C. 1 and 3
D. 2 and 3

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

15. 

A rigid bar is supported by a spring as shown in the given figure.

The deflection of the point B will be

A. 10 mm upward
B. 20 mm downward
C. 5 mm upward
D. 40 mm downward.

Answer: Option D

Explanation:

The Force in spring F = (500x2L)/L = 1000N.

Deflection in the spring δ = F/k = 1000/50 = 20mm.

Deflection at the point B = 2δ = 40mm downward.