Water Resources Engineering and Hydrology (3160610) MCQs

MCQs of Introduction

Showing 11 to 20 out of 44 Questions
1 2 3 4 5
11.

Lysimeter and current meter are used to measure respectively, one of the following group of quantities

(a)

Capillary potential and permeability
(b)

Evapotranspiration and velocity of flow in channels
(c)

Velocity of flow in channels and vapour pressure
(d)

Velocity in pipes and pressure head
Answer:

Option (b)

12.

A catchment at a particular site on a river has 86000 ha area. The mean annual precipitation is 850 mm. [25% of precipitation reaches the basin outlet as stream flow] The mean flow rate Q at this site will be _____________ m3/hr.

(a)

20862
(b)

20202
(c)

20900
(d)

20820
Answer:

Option (a)

13.

The normal annual rainfall at stations A, B and C in a basin are 175 cm, 180 cm and 150 cm respectively. In the year 2000, station B was inoperative and stations A and C recorded annual precipitation of 150 cm and 135 cm respectively. The annual rainfall at station B in that year could be estimated to be nearly __________ cm.

(a)

158.14
(b)

150
(c)

168
(d)

154
Answer:

Option (a)

14.

The rainfall on five successive days on a catchment was 2, 6, 9, 5 and 3 cm. If the φ-index for the storm can be assumed to be 3 cm/day, the total direct runoff from catchment is __________ cm.

(a)

11
(b)

10
(c)

9
(d)

9.5
Answer:

Option (a)

15.

During a 6-hour storm, the rainfall intensity was 0.8 cm/hour on a catchment of area 8.6 km2. The measured runoff volume during this period was 256000 m3. The total rainfall that was lost due to infiltration, evaporation, and transpiration (in cm/hour) is

(a)

0.80
(b)

0.304
(c)

0.496
(d)

none of above
Answer:

Option (b)

16.

Match List-I with List-II and select the correct answers using the codes given
below the lists:
List-I                                      List-II
A. Rainfall intensity            1. Isohyets
B. Rainfall excess                2. Cumulative rainfall
C. Rainfall averaging          3. Hyetograph
D. Mass curve                     4. Direct runoff hydrograph

 

    A B C D
(a) 1 3 2 4
(b) 3 4 1 2
(c) 1 2 4 3
(d) 3 4 2 1

(a)

a
(b)

b
(c)

c
(d)

d
Answer:

Option (b)

17.

The Thiessen polygon is

(a)

a polygon obtained by joining adjoining rain gauge stations.
(b)

a representative area used for weighing the observed station precipitation.
(c)

an area used in the construction of depth area curves.
(d)

the descriptive term for shape of a hydrograph.
Answer:

Option (b)

18.

Following is the set of observed data for successive 15 minutes period of 90
minutes storm in a catchment

duration (hrs.) 15 30 45 60 75 90
rainfall (cm.) 2 2 8 7 1.25 1.25


If the value of φ-index is 3 cm/hr, the value of W-index will be ________ cm/hr.

(a)

2.08
(b)

1.05
(c)

2.01
(d)

1.99
Answer:

Option (a)

19.

Hourly rainfalls of 40, 60 and 80 mm occur over a 25 ha area with φ = 50 mm/h for 4 ha, φ = 30 mm/h for 10 ha and φ = 10 mm/h for 11 ha. The total rainfall excess for the 3 hour storm will be

(a)

128.2 mm
(b)

108.4 mm
(c)

96.2 mm
(d)

84.4 mm
Answer:

Option (b)

20.

There are four rain gauge stations existing in the catchment of a river. The average annual rainfall values at these stations are 800, 620, 400 and 540 mm respectively. How many more gauges are required to be installed, if it is desired to limit the error in the mean value of rainfall in the catchment to 10%?

(a)

8
(b)

6
(c)

4
(d)

3
Answer:

Option (c)

Showing 11 to 20 out of 44 Questions
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