Top 150+ Solved Irrigation Engineering MCQ Questions Answer
Q. Interception losses are due toi) evaporationii) transpirationiii) stream flowThe correct answer is
a. only (i)
b. (i)and(ii)
c. (ii) and (iii)
d. (i), (ii) and (iii)
Q. 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
Q. To determine the discharge at a section in a stream from its rating curve, the required data arei) slope of water surface at the sectionii) stage at the section iii) current meter readings at the section The correct answer is
a. (i) and (ii)
b. (ii) and (iii)
c. only (ii)
d. only (iii)
Q. The stage of river carrying a discharge of Q m7sec at a point is 10 m and slope of water surface is (1/4000). The discharge of a flood at the same point and same stage of 10 m with a water surface slope of(l/1000)willbe
a. V2 Q m3/sec
b. 0.5 Q mVsec
c. 2 Q m3/sec
d. 4 Q m3/sec
Q. 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
Q. The flow-mass curve is graphical representation of
a. cumulative discharge and time
b. discharge and percentage probability of flow being equaled or exceeded
c. cumulative discharge, volume and time in chronological order
d. discharge and time in chronological order
Q. 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
Q. The shape of recession limb of a hydrograph depends upon
a. basin characteristics only
b. storm characteristics only
c. both (a) and (b)
d. none of the above
Q. Instantaneous unit hydrograph is a hydrograph ofi) unit durationii) unit rainfall excessiii) infinitely small durationiv) infinitely small rainfall excessThe correct answer is
a. (i) and (ii)
b. (i)and(iv)
c. (ii) and (iii)
d. (iii) and (iv)
Q. 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
Q. A unit hydro graph has one unit of
a. rainfall duration
b. rainfall excess
c. time base of direct runoff
d. discharge
Q. 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
Q. To estimate the magnitude of a flood with a return period of T years, Gumbel's distribution method requires the following data pertaining to annual flood seriesi) mean valueii) standard deviationiii) length of recordiv) coefficient of skewThe correct answer is
a. (i) and (ii)
b. (i),(ii) and (iii)
c. (i), (ii) and (iv)
d. (i), (ii), (iii) and (iv)
Q. 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