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MCQs 1: 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) will be________________?

V2 Q m3/sec 0.5 Q mVsec 2 Q m3/sec 4 Q m3/sec
Answer Explanation

MCQs 2: The flow-mass curve is graphical representation of__________________?

cumulative discharge and time discharge and percentage probability of flow being equaled or exceeded cumulative discharge, volume and time in chronological order discharge and time in chronological order
Answer Explanation

MCQs 3: The shape of recession limb of a hydrograph depends upon________________?

basin characteristics only storm characteristics only both (A) and (B) none of the above
Answer Explanation

MCQs 4: 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_______________?

0.2 x 106 0.6 x 106 2.4 xlO6 7.2 xlO6
Answer Explanation

MCQs 5: 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__________________?

20 3/sec 25 m3/sec 30 m3/sec 35 m3/sec
Answer Explanation

MCQs 6: 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________________?

N/(m+l) m/(N+l) m/N (N+l)/m
Answer Explanation

MCQs 7: A unit hydro graph has one unit of_______________?

rainfall duration rainfall excess time base of direct runoff discharge
Answer Explanation

MCQs 8: If the risk of a flood occurring in the next 10 years is accepted to 10%, then the return period for design should be__________________?

1 + (0.9)010 1 – (0.9)°l0 1/(1-0.9°10) 1/(1+ 0.9010)
Answer Explanation

MCQs 9: If the demand line drawn from a ridge in a flow mass curve does not intersect the curve again, it indicates that______________?

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

MCQs 10: The stream which does not have any base flow contribution is called________________?

perennial stream intermittent stream ephemeral stream none of the above
Answer Explanation

MCQs 11: Which of the following methods is used to estimate flood discharge based on high water marks left over in the past ?

slope-area method area-velocity method moving boat method ultra-sonic method
Answer Explanation

MCQs 12: 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_____________?

(0.99)10 1 – (0.99)10 (0.9)’00 l-(0.9)100
Answer Explanation

MCQs 13: A hydroelectric scheme operating under a head of 80 m will be classified as_____________?

low head scheme medium head scheme high head scheme none of the above
Answer Explanation

MCQs 14: The net head under which the turbine reaches its peak efficiency at synchronous speed is called________________?

design head rated head gross head operating head
Answer Explanation

MCQs 15: The net speed under which the turbine reaches its peak efficiency is called_________________?

design speed rated speed gross speed operating speed
Answer Explanation

MCQs 16: Lining of irrigation channels________________?

increases the waterlogging area decreases the waterlogging area does not change the water logging area none of the above
Answer Explanation

MCQs 17: A river training work is generally required when the river is_______________?

aggrading type degrading type meandering type both (A) and (B)
Answer Explanation

MCQs 18: The main cause of meandering is________________?

presence of an excessive bed slope in the river degradation the extra turbulence generated by the excess of river sediment during floods none of the above
Answer Explanation

MCQs 19: Tortuosity of a meandering river is the ratio of__________________?

meander belt to meander length meander length to meander belt curved length along the channel to the direct axial length of the river reach direct axial length of the river reach to curved length along the channel
Answer Explanation

MCQs 20: The aqueduct or superpassage type of works are generally used when_______________?

high flood drainage discharge is small high flood drainage discharge is large and short lived high flood drainage discharge is large and continues for a long time none of the above
Answer Explanation

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