RRB JE-Civil Model Paper-5

Test Preparation on RRB JE-Civil Model Paper-5

1.

Which of the following statements are correct?

1. A fine sprinkle of precipitation of small and rather uniform water drops with all drop diameters below 0.10 mm is called a drizzle.

2. The precipitation of liquid water with every drop diameter less than 0.5 mm is known as rain

3. Precipitation in the form of balls or irregular lumps of ice each over 5 mm in diameter is called hail.

4. Dew is formed directly by condensation on the ground mainly during the night when the surface has been cooled by outgoing radiation

11 and 2
22 and 3
33 and 4
41 and 4

2.

The double mass curve technique is used:

1To find the average rainfall over a number of years
2To estimate the missing rainfall data
3To check the consistency of rain gauge records
4To find the minimum number of rain gauges required in a basin

3.

The theory of synthetic hydrograph based on flood routing techniques is based on the principle that rainfall impulse net storm rain) is modified by the factors:

1. The time of travel of the flow volume in channel and overland flow

2. Storage

3. Both translation and storage

11 and 2 only
21, 2 and 3
31 and 3 only
42 and 3 only

4.

It is proposed to design a causeway along a village road. The return period for the annual maximum flood of a given magnitude was found to be 5 years. The probability that this flood magnitude will be exceeded at least once during the next 2 years is:

10.8
20.5
30.45
40.36

5.

Wading technique is used:

1To determine velocity of sea waves during Tsunami
2To determine thickness of canal lining in alluvial soils
3To measure the volume of dredging material in harbours
4To determine velocity of flow in shallow streams

6.

A mean annual runoff 2 m 3/s from a catchment of area 10km

1530 cm
2590 cm
3630 cm
4658 cm

7.

Steep rise in the flow-mass curve during a certain period indicates:

1Very high evaporation losses during that period
2Flash floods during that period
3Sudden spurt in irrigation demand during that period
4Sudden rise in demand for water to meet hydropower generation.

8.

A rise crop is to be irrigated in a field covering an area of 2400 ha, the duty and base period of rice are given as 860 ha/cumec and 120 days respectively. The volume of water required in the field is nearly:

1500 ha
21400 ha-m
32000 ha-m
42880

9.

In an irrigation project, in a certain year, 70% and 46% of the culturable command area in Kharif and Rabi, respectively, remained without water and rest of the area got irrigation water. The intensity of irrigation in that year for the project was:

1116%
284%
342%
458%

10.

The gross command area for a distributory is 5000 hectares, 80% of which is culturable irrigable. The intensity of irrigation for Rabi is 50%; and for Kharif is 30%. The average duty at the head of the distributory is 2000 hectares/ cumec for Rabi season and 900 hectares/cumec for Kharif season. The discharge required at the head of the distributory from average demand considerations is:

11.00 cumecs
21.33 cumecs
32.33 cumecs
43.33 cumecs

11.

As recommended by Sichardt, the radius of influence is :

1Inversely proportional to drawdown
2Linearly proportional to drawdown
3Independent of drawdown
4Proportional to square root of drawdown

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