GATE CE format:mcq PYQs & Answers — Page 49

Questions 481–490 of 724. Imported answers require independent review unless marked reviewed.

For the hottest month of the year at the proposed airport site, the monthly mean of the average daily temperature is 39°C. The monthly mean of the maximum daily temperature is 48°C for the same month of the year. From the given information, the calculated Airport Reference Temperature (in °C), is

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The total stress paths corresponding to different loading conditions, for a soil specimen under the isotropically consolidated stress state (O), are shown below. The correct match between the stress paths and the listed loading conditions, is

Diagram for Civil Engineering question 34

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OP – I, OQ – II, OR – IV, OS – III

OP – IV, OQ – III, OR – I, OS – II

OP – III, OQ – II, OR – I, OS – IV

OP – I, OQ – III, OR – II, OS – IV

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Permeability tests were carried out on the samples collected from two different layers as shown in the figure (not drawn to the scale). The relevant horizontal (k_h) and vertical (k_v) coefficients of permeability are indicated for each layer.

The ratio of the equivalent horizontal to vertical coefficients of permeability, is

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37.29

80.20

68.25

0.03

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The soil profile at a site up to a depth of 10 m is shown in the figure (not drawn to the scale). The soil is preloaded with a uniform surcharge (q) of 70 kN/m² at the ground level. The water table is at a depth of 3 m below ground level. The soil unit weight of the respective layers is shown in the figure.

Diagram for Civil Engineering question 35

Consider unit weight of water as 9.81 kN/m³ and assume that the surcharge (q) is applied instantaneously. Immediately after preload, the effective stresses (in kPa) at points P and Q, respectively, are

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124 and 204

36 and 90

36 and 126

54 and 95

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A 10 m high slope of dry clay soil (unit weight = 20 kN/m³), with a slope angle of 45° and the circular slip surface, is shown in the figure (not drawn to the scale). The weight of the slip wedge is denoted by W. The undrained unit cohesion (c_u) is 60 kPa.

The factor of safety of the slope against slip failure, is

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1.84

1.57

0.58

1.67

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Water flows at the rate of 12 m³/s in a 6 m wide rectangular channel. A hydraulic jump is formed in the channel at a point where the upstream depth is 30 cm (just before the jump). Considering acceleration due to gravity as 9.81 m/s² and density of water as 1000 kg/m³, the energy loss in the jump is

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114.2 kW

114.2 MW

141.2 h.p.

141.2 J/s

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Crops are grown in a field having soil, which has field capacity of 30% and permanent wilting point of 13%. The effective depth of root zone is 80 cm. Irrigation water is supplied when the average soil moisture drops to 20%. Consider density of the soil as 1500 kg/m³ and density of water as 1000 kg/m³. If the daily consumptive use of water for the crops is 2 mm, the frequency of irrigating the crops (in days), is

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A water supply scheme transports 10 MLD (Million Litres per Day) water through a 450 mm diameter pipeline for a distance of 2.5 km. A chlorine dose of 3.50 mg/litre is applied at the starting point of the pipeline to attain a certain level of disinfection at the downstream end. It is decided to increase the flow rate from 10 MLD to 13 MLD in the pipeline. Assume exponent for concentration, n = 0.86. With this increased flow, in order to attain the same level of disinfection, the chlorine dose (in mg/litre) to be applied at the starting point should be

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3.95

4.40

4.75

5.55

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Alkalinity of water, in equivalent/litre (eq/litre), is given by

Where, represents concentration in mol/litre. For a water sample, the concentrations of HCO₃⁻ = 2×10⁻³ mol/litre, CO₃²⁻ = 3.0 × 10⁻⁴ mol/litre and the pH of water = 9.0. The atomic weights are: Ca = 40; C = 12; and O = 16. If the concentration of OH⁻ and H⁺ are NEGLECTED, the alkalinity of the water sample (in mg/litre as CaCO₃), is

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130.4

100.0

50.0

65.2

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An open traverse PQRS is surveyed using theodolite and the consecutive coordinates obtained are given in the table.

Line	Northing (m)	Southing (m)	Easting (m)	Westing (m)
PQ	110.2	-	45.5	-
QR	80.6	-	-	60.1
RS	-	90.7	-	70.8
ST	-	105.4	55.5	-

If the independent coordinates (North, East) of station P are (400 m, 200 m), the independent coordinates (in m) of station T, are

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194.7, 370.1

205.3, 429.9

394.7, 170.1

405.3, 229.9

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GATE CE format:mcq PYQs

Question 33

Question 34

Question 34

Question 35

Question 35

Question 36

Question 36

Question 37

Question 37

Question 38