GATE CE topic:structural-engineering PYQs & Answers — Page 74

Questions 731–740 of 1300. Imported answers require independent review unless marked reviewed.

Based on drained triaxial shear tests on sands and clays, the representative variations of volumetric strain (

) with the shear strain (

) is shown in the figure. Choose the CORRECT option regarding the representative behavior exhibited by Curve

and Curve

Diagram for Civil Engineering question 31

Your answerChoose one option.

Curve P presents dense sand and overconsolidated clay, while Curve Q represents loose sand and normally consolidated clay

Curve P presents dense sand and normally consolidated clay, while Curve Q represents loose sand and overconsolidated clay

Curve P presents loose sand and overconsolidated clay, while Curve Q represents dense sand and normally consolidated clay

Curve P presents loose sand and normally consolidated clay, while Curve Q represents dense sand and overconsolidated clay

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A rectangular open channel of 6 m width is carrying a discharge of 20 m

/s. Consider the acceleration due to gravity as 9.81 m/s

and assume water as incompressible and inviscid. The depth of flow in the channel at which the specific energy of the flowing water is minimum for the given discharge will then be

Your answerChoose one option.

0.82 m

1.04 m

2.56 m

3.18 m

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A fluid flowing steady in a circular pipe of radius

has a velocity that is everywhere parallel to the axis (centerline) of the pipe. The velocity distribution along the radial direction is

, where

is the radial distance as measured from the pipe axis and

is the maximum velocity at

. The average velocity of the fluid in the pipe is

Your answerChoose one option.

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Read the statements given below. (i) Value of the wind profile exponent for the ‘very unstable’ atmosphere is smaller than the wind profile exponent for the ‘neutral’ atmosphere. (ii) Downwind concentration of air pollutants due to an elevated point source will be inversely proportional to the wind speed. (iii) Value of the wind profile exponent for the ‘neutral’ atmosphere is smaller than the wind profile exponent for the ‘very unstable’ atmosphere. (iv) Downwind concentration of air pollutants due to an elevated point source will be directly proportional to the wind speed. Select the correct option.

Your answerChoose one option.

(i) is False and (iii) is True

(i) is True and (iv) is True

(ii) is False and (iii) is False

(ii) is False and (iv) is False

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A water sample is analyzed for coliform organisms by the multiple-tube fermentation method. The results of confirmed test are as follows:

Sample size (mL)	Number of positive results out of 5 tubes	Number of negative results out of 5 tubes
0.01	5	0
0.001	3	2
0.0001	1	4

The most probable number (MPN) of coliform organisms for the above results is to be obtained using the following MPN Index.

Combination of positive tubes	MPN Index per 100 mL
0 – 2 – 4	11
1 – 3 – 5	19
4 – 2 – 0	22
5 – 3 – 1	110

The MPN of coliform organisms per 100 mL is

Your answerChoose one option.

110000

11000

1100

110

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A water filtration unit is made of uniform-size sand particles of 0.4 mm diameter with a shape factor of 0.84 and specific gravity of 2.55. The depth of the filter bed is 0.70 m and the porosity is 0.35. The filter bed is to be expanded to a porosity of 0.65 by hydraulic backwash. If the terminal settling velocity of sand particles during backwash is 4.5 cm/s, the required backwash velocity is

Your answerChoose one option.

m/s

0.69 cm/s

0.75 cm/s

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Ammonia nitrogen is present in a given wastewater sample as the ammonium ion (NH₄⁺) and ammonia (NH₃). If pH is the only deciding factor for the proportion of these two constituents, which of the following is a correct statement?

Your answerChoose one option.

At pH above 9.25, only NH₄⁺ will be present.

At pH below 9.25, NH₃ will be predominant.

At pH 7.0, NH₄⁺ and NH₃ will be found in equal measures.

At pH 7.0, NH₄⁺ will be predominant.

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For a given traverse, latitudes and departures are calculated and it is found that sum of latitudes is equal to +2.1 m and the sum of departures is equal to −2.8 m. The length and bearing of the closing error, respectively, are

Your answerChoose one option.

3.50 m and 53°48′ NW

2.45 m and 53°48′ NW

0.35 m and 53.13° SE

3.50 m and 53.13° SE

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On a road, the speed – density relationship of a traffic stream is given by

(where speed,

, is in km/h and density,

, is in veh/km). At the capacity condition, the average time headway will be

Your answerChoose one option.

0.5 s

1.0 s

1.6 s

2.1 s

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From laboratory investigations, the liquid limit, plastic limit, natural moisture content and flow index of a soil specimen are obtained as 60%, 27%, 32% and 27, respectively. The corresponding toughness index and liquidity index of the soil specimen, respectively, are

Your answerChoose one option.

0.15 and 1.22

0.19 and 6.60

1.22 and 0.15

6.60 and 0.19

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GATE CE topic:structural-engineering PYQs

Question 31

Question 31

Question 32

Question 32

Question 33

Question 33

Question 34

Question 34

Question 35

Question 35