Description : For the estimate of high floods in fan-shaped catchment, the formula used is (A) Dicken's formula (B) Ryve's formula (C) Inglis formula (D) None of these
Last Answer : Answer: Option C
Description : Ryve's formula for flood estimate in cumecs, is (A) Q = CA3/4 (B) Q = CA2/3 (C) Q = CA1/2 (D) Q = CA1/4
Last Answer : Answer: Option B
Description : For high flood estimates the average value of the constant C in Dicken's formula Q =CA3/4, is (A) 6.5 (B) 8.5 (C) 9.5 (D) 11.5
Last Answer : Answer: Option D
Description : 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) Ultrasonic method
Last Answer : Answer: Option A
Description : m and n are monsoon duration factor and catchment factor respectively. If P is yearly rainfall in cm, runoff can be calculated by (A) Velocity area method (B) Weir or spillway method (C) Use of venturi-meter (D) Using power plant consumption
Last Answer : (A) Velocity area method
Description : The design of a retaining wall assumes that the retained earth (A) Is dry (B) Is free from moisture (C) Is not cohesive (D) All the above
Description : An intense rain is falling at a uniform rate of 7.5 cm/hour for a period of 60 minutes on a basin whose area is 500 hectares. If the average infiltration capacity during the entire rain period is assumed to be 1.5 ... of the basin, is (A) 40 cumecs (B) 60 cumecs (C) 80 cumecs (D) 100 cumecs
Description : Burge formula Q = 19.6 (A/L2/3) cumecs is based upon (A) Rainfall and drainage area (B) Run off and drainage area (C) Drainage area and its shape (D) Drainage area
Description : Pettis formula Q = C (P.B)5/4 cumecs, is based upon (A) Rainfall and drainage area (B) Run off and drainage area (C) Drainage area and its shape (D) Drainage area
Description : Boston society of Civil Engineer's formula Q = 0.0056 × (D/t) in cumecs/square km is based upon (A) Rainfall and drainage area (B) Total run off and drainage area (C) Drainage area and its shape (D) Drainage area
Description : . Kick's law assumes that the energy required for size reduction is proportional to the logarithm of the ratio between the initial and the final diameters. The unit of Kick's constant is (A) kW. sec/kg (B) kWh/kg (C) kWh/sec. kg (D) kg/sec
Last Answer : (A) kW. sec/kg
Description : For 3.25 × 10-2 cumecs discharging from a well, a pump is installed to lift water against a total head of 30 m. The minimum required horse power, is (A) 10 H.P. (B) 15 H.P. (C) 18 H.P. (D) 20 H.P.
Last Answer : (D) 20 H.P.
Description : If intensity of rainfall in cm per hour is I, percentage coefficient of run-off is P, area of catchment in square kilometres is A, the total run-off Q, is given by (A) Q = 1.758 102 API (B) Q = 2.758 ... API (C) Q = 2.758 103 API (D) Q = 2.758 103 A/PI
Last Answer : (C) Q = 2.758 × 103 × API
Description : Run off includes (A) Precipitation over catchment area of the stream and its attributaries (B) Surface run off (C) Ground water flow (D) All the above
Description : For a catchment area of 120 km², the equilibrium discharge in m3/hour of a Scurve obtained by the summation of 6 hour unit hydro graph is (A) 0.2 × 106 (B) 0.6 × 106 (C) 2.4 × 106 (D) 7.2 × 10
Description : Intermediate catch water drains are provided only, if (A) Catchment area of the watershed above road is large (B) Intensity of rainfall is heavy (C) Single catch water drain is inadequate (D) All the above
Description : Which of the following is used to estimate which areas will be inundated during a flood, based on river height information? (a) satellite and radar images (b) flood maps / floodplain hydraulic models (c) river gauging stations (d) all of the above.
Last Answer : (b) flood maps / floodplain hydraulic models
Description : If discharge of a pump is 0.16 cumecs, the economic diameter of pipe, is (A) 0.488 m (B) 4.88 cm (C) 48.8 cm (D) 4.88 m
Last Answer : (A) 0.488 m
Description : For calculation of economical diameter D of a pipe in metres for a discharge Q to be pumped in cumecs, Lea suggested the empirical formula (A) D = 0.22 Q (B) D = 1.22 Q (C) D = 2.22 Q (D) D = 3.22 Q
Last Answer : (B) D = 1.22 Q
Description : If total run off of a basin of 50 hectares is 0.8 cm, the ordinate of Bernard's distribution graph, may be calculated by the formula (where Q is the discharge in cumecs at the given time) (A) y = 50 Q (B) y = 100 Q (C) y = 200 Q (D) y = 250 Q
Description : If is unit weight of water, Q the discharge in cumecs, H the pump, the H.P. of the motor is (A) H.P. = /75 (B) H.P. = /4500 (C) H.P. = /75 H (D) H.P. = /4500 H
Description : In a Sarda type fall, rectangular crest is used for discharge upto (A) 6 cumecs (B) 10 cumecs (C) 14 cumecs (D) 20 cumecs
Description : Which model assumes that systems are created fromreusable components, scripting or database programming? a) An application-composition model b) A post-architecture model c) A reuse model d) An early design model
Last Answer : a) An application-composition model
Description : The design flood commonly adopted in India for barrages and minor dams is (a) Probable maximum flood (b) A flood of 50 – 100 years return period (c) Peak flood (d) Standard project flood or a 100-year flood, whichever is higher
Last Answer : (d) Standard project flood or a 100-year flood, whichever is higher
Description : Pick up the incorrect statement from the following: (A) The net amount of water which joins the surface streams in a catchment, is known as surface run-off (B) The amount of water which ... over the catchment, is termed as the yield of the drainage basin (D) None of these
Last Answer : (D) None of these
Description : For determination of average annual precipitation in a catchment basin, the best method is (A) Arithmetical method (B) Thiessen's mean method (C) Isohyetal method (D) None of these
Description : While calculating the average depth of annual precipitation in a catchment basin, importance to individual rain-gauge station is given in (A) Arithmetical method (B) Thiessen's mean method (C) Isohyetal method (D) Both (b) and (c)
Description : A 6 hours storm had 4 cm of rainfall and the resulting runoff was 2 cm. If
Description : The rainfall on five successive days on a catchment was 3, 6, 9, 5 and 1 cm respectively. If the -index for the storm can be assumed to be 3 cm/day, the total direct runoff from the catchment due to this storm is (a) 11 cm (b) 24 cm (c) 9 cm (d) 20 cm
Last Answer : (a) 11 cm
Description : For initial estimate for a beam design, the width is assumed (A) 1/15th of span (B) 1/20th of span (C) 1/25th of span (D) 1/30th of span
Description : Which one among the following rivers has the largest catchment area? [IAS 2008] (a) Cauvery (b) Krishna (c) Mahanadi (d) Narmada
Last Answer : Ans: (b)
Description : The increased incidence of floods in recent times in North India is due to – (1) increase in the annual rainfall, (2) increase in the silting of dams, (3) increased deforestation in the catchment area, (4) None of these
Last Answer : (3) increased deforestation in the catchment area, Explanation: The frequency and severity of flooding in the Gangetic plain has steadily increased in recent years. Deforestation of the Terai appears to be one of the major causes.
Description : What is meant by catchment area and explain its function:
Last Answer : The whole area behind the dam is called the catchment area. The rain water in the area will be drained into the dam through a dam or river.
Description : The area of land where water collects after the rain is termed as: A. Watershed. B. Catchment area. C. Aquifer. D. Percolation area.
Last Answer : B. Catchment area.
Description : The human factors which cause floods are: (a) Deforestation (b) Heavy rainfall (c) Cloud burst (d) Large catchment area
Last Answer : (a) Deforestation
Description : Catchment Command Area (CCA) of minor irrigation projects must be less than ______ a. 4,000 hectares b. 2,000 hectares c. 3,000 hectares d. 1,000 hectares
Last Answer : c. 3,000 hectares
Description : Catchment Command Area (CCA) of major irrigation projects must be more than ______ a. 8,000 hectares b. 12,000 hectares c. 10,000 hectares d. 15, 000 hectares
Last Answer : c. 10,000 hectares
Description : Coulomb's wedge theory assumes that (A) Back fill is dry, cohesionless, homogeneous and isotropic (B) Slip surface is the plane which passes through the heel of the wall (C) Position and direction of the resultant earth pressure are known (D) All the above
Last Answer : (D) All the above
Description : Terzaghi's analysis assumes: (A) Soil is homogeneous and isotropic (B) Elastic zone has straight boundaries inclined at = to the horizontal and plastic zones fully developed (C) Failure zones do not extend above the horizontal plane through the base of the footing (D) All the above
Description : Rankine's theory of earth pressure assumes that the back of the wall is (A) Plane and smooth (B) Plane and rough (C) Vertical and smooth (D) Vertical and rough
Description : Terzaghi's theory of one dimensional consolidation assumes (A) Load is applied in one direction (B) Coefficient of permeability is constant (C) Excess pore water drains out only in the vertical direction (D) All the above
Description : Bishop's method of stability analysis (A) Is more conservative (B) Neglects the effect of forces acting on the sides of the slices (C) Assumes the slip surface as an arc of a circle (D) All of the above
Description : Rankine's theory of active earth pressure assumes (A) Soil mass is homogeneous, dry and cohesionless (B) Ground surface is a plane which may be horizontal or inclined (C) Back of the wall is vertical and smooth (D) All the above
Description : Consider the following statements regarding Coulomb's theory of earth pressure: 1. It is based on wedge theory of earth pressure. 2. It assumes the wall surface to be rough. 3. It may or may not satisfy the static equilibrium condition ... 1, 2 & 3 (b) 1 & 2 only (c) 2 & 3 only (d) 1 & 3 only
Last Answer : (b) 1 & 2 only
Description : A drop of liquid assumes spherical shape because: (1) Intermolecular forces are strong in liquids (2) A sphere has the least surface area for a given volume (3) A sphere has the largest surface area for a given volume (4) Inter molecular forces are weak in liquids
Last Answer : (2) A sphere has the least surface area for a given volume Explanation: A drop of liquid assumes spherical shape because a sphere has the least surface area for a given volume.
Last Answer : A sphere has the least surface area for a given volume
Description : 15 cumecs, the depth d and width are related by For drains up to A. d = 0.2 B B. d = 0.5 B C. B = 0.2 d D. B = 0.5 d
Last Answer : ANS: B
Description : If the peak discharge of a storm water drain (S.W. Drain) is expected to exceed 150 cumecs, the free board to be provided, is A. 100 cm B. 90 cm C. 80 cm D. 50 cm
Last Answer : ANS: A
Description : For the open drain (N = 0.025) shown in the below figure, the discharge is A. 26.88 cumecs B. 27.88 cumecs C. 28.88 cumecs D. 29.88 cumecs
Last Answer : ANS: C