Water Resources Engineering and Hydrology Archives | Page 7 of 14

A hydroelectric scheme operating under a head of 80 m will be classified as_____________?

August 13, 2021January 18, 2019 by admin

A hydroelectric scheme operating under a head of 80 m will be classified as_____________?

A. low head scheme
B. medium head scheme
C. high head scheme
D. none of the above

The maximum rainfall depth of 300 mm in 24 hours has a return period of 100 years. The probability of 24 hours rainfall equal to or greater than 300 mm occurring at least once in 10 years is given by_____________?

August 13, 2021January 18, 2019 by admin

The maximum rainfall depth of 300 mm in 24 hours has a return period of 100 years. The probability of 24 hours rainfall equal to or greater than 300 mm occurring at least once in 10 years is given by_____________?

A. (0.99)10
B. 1 – (0.99)10
C. (0.9)’00
D. l-(0.9)100

Which of the following methods is used to estimate flood discharge based on high water marks left over in the past ?

August 13, 2021January 18, 2019 by admin

Which of the following methods is used to estimate flood discharge based on high water marks left over in the past ?

A. slope-area method
B. area-velocity method
C. moving boat method
D. ultra-sonic method

The stream which does not have any base flow contribution is called________________?

August 13, 2021January 18, 2019 by admin

The stream which does not have any base flow contribution is called________________?

A. perennial stream
B. intermittent stream
C. ephemeral stream
D. none of the above

If the demand line drawn from a ridge in a flow mass curve does not intersect the curve again, it indicates that______________?

August 13, 2021January 18, 2019 by admin

If the demand line drawn from a ridge in a flow mass curve does not intersect the curve again, it indicates that______________?

A. demand cannot be met by inflow
B. reservoir was not full at the beginning
C. both (A) and (B)
D. none of the above

If the risk of a flood occurring in the next 10 years is accepted to 10%, then the return period for design should be__________________?

August 13, 2021January 18, 2019 by admin

If the risk of a flood occurring in the next 10 years is accepted to 10%, then the return period for design should be__________________?

A. 1 + (0.9)010
B. 1 – (0.9)°l0
C. 1/(1-0.9°10)
D. 1/(1+ 0.9010)

A unit hydro graph has one unit of_______________?

August 13, 2021January 18, 2019 by admin

A unit hydro graph has one unit of_______________?

A. rainfall duration
B. rainfall excess
C. time base of direct runoff
D. discharge

For an annual flood series arranged in descending order of magnitude, the return for a magnitude listed at position period m in a total data N is________________?

August 13, 2021January 18, 2019 by admin

For an annual flood series arranged in descending order of magnitude, the return for a magnitude listed at position period m in a total data N is________________?

A. N/(m+l)
B. m/(N+l)
C. m/N
D. (N+l)/m

The peak of a 4 hour flood hydrograph is 240 m3/sec . If the rainfall excess is 80 mm and base flow which is constant is 40 m3/sec, then the peak of 4-hours unit hydrograph will be__________________?

August 13, 2021January 18, 2019 by admin

The peak of a 4 hour flood hydrograph is 240 m3/sec . If the rainfall excess is 80 mm and base flow which is constant is 40 m3/sec, then the peak of 4-hours unit hydrograph will be__________________?

A. 20 3/sec
B. 25 m3/sec
C. 30 m3/sec
D. 35 m3/sec

For a catchment area of 120 km2, the equilibrium discharge in m3/hour of an S-curve obtained by the summation of 6 hour unit hydro graph is_______________?

August 13, 2021January 18, 2019 by admin

For a catchment area of 120 km2, the equilibrium discharge in m3/hour of an S-curve obtained by the summation of 6 hour unit hydro graph is_______________?

A. 0.2 x 106
B. 0.6 x 106
C. 2.4 xlO6
D. 7.2 xlO6