What are the questions asked in GATE 2021 Civil Engineering Set 1 exam?

Complete set of questions from GATE 2021 CE Set 1 exam covering Structural Engineering, Geotechnical Engineering, Environmental Engineering, Transportation Engineering, Fluid Mechanics, Surveying, RCC Design, Steel Structures, Soil Mechanics, and Water Resources Engineering with detailed solutions.

Where can I download GATE 2021 Civil Engineering Set 1 question paper?

You can download the complete GATE 2021 Civil Engineering Set 1 question paper with solutions from ExamPrev. The PDF includes all questions with detailed explanations.

How many questions were in GATE 2021 CE Set 1 paper?

GATE 2021 Civil Engineering Set 1 paper consisted of 65 questions including MCQs, MSQs, and numerical answer type questions covering all major civil engineering topics.

Are solutions provided for GATE 2021 CE Set 1 questions?

Yes, detailed step-by-step solutions with explanations are provided for all questions from GATE 2021 Civil Engineering Set 1 paper.

What was the difficulty level of GATE 2021 CE Set 1?

GATE 2021 CE Set 1 had moderate to difficult level with good coverage of fundamental and application-based questions across all civil engineering subjects.

Civil Engineering Gate 2021 Set-1 Questions with Answer

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Ques 27 GATE 2021 SET-1

The liquid forms of particulate air pollutants are

dust and mist

mist and spray

smoke and spray

fly ash and fumes

(b) is the correct answer.

Ques 28 GATE 2021 SET-1

The shape of the most commonly designed highway vertical curve is

circular (single radius)

circular (multiple radii)

parabolic

spiral

Ques 29 GATE 2021 SET-1

A highway designed for 80 km/h speed has a horizontal curve section with radius 250 m. If the design lateral friction is assumed to develop fully, the required super elevation is

0.02

0.05

0.07

0.09

(b) is the correct answer.

Ques 30 GATE 2021 SET-1

Which of the following is NOT a correct statement?

The first reading from a level station is a 'Fore Sight'.

Basic principle of surveying is to work from whole to parts.

Contours of different elevations may intersect each other in case of an overhanging cliff.

Planimeter is used for measuring 'area'.

(a) is the correct answer.

Ques 31 GATE 2021 SET-1

Which of the following is/are correct statement(s)?

Back Bearing of a line is equal to Fore Bearing ±180°.

If the whole circle bearing of a line is 270°, its reduced bearing is 90° NW.

The boundary of water of a calm water pond will represent contour line.

In the case of fixed hair stadia tachometry, the staff intercept will be larger, when the staff is held nearer to the observation point.

(a; b; c) is the correct answer.

Ques 32 GATE 2021 SET-1

Consider the limit:

The limit (correct up to one decimal place) is _______.

(0.5 to 0.5) is the correct answer.

Ques 33 GATE 2021 SET-1

The volume determined from ∬_V 8 xyz dV for V = [2, 3]× [1, 3] × [0, 1] will be (in integer) _______.

(15 to 15) is the correct answer.

Ques 34 GATE 2021 SET-1

The state of stress in a deformable body is shown in the figure. Consider transformation of the stress from the x-y coordinate system to the X-Y coordinate system. The angle θ, locating the X-axis, is assumed to be positive when measured from the x-axis in counter-clockwise direction.

The absolute magnitude of the shear stress component σ_xy (in MPa, round off to one decimal place) in x-y coordinate system is _______.

(95 to 97) is the correct answer.

Ques 35 GATE 2021 SET-1

Based on drained triaxial shear tests on sands and clays, the representative variations of volumetric strain (ΔV/V) with the shear strain (γ) is shown in the figure.

Choose the CORRECT option regarding the representative behaviour exhibited by Curve P and Curve Q.

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

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

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

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

(a) is the correct answer.

Ques 36 GATE 2021 SET-1

A fluid flowing steadily in a circular pipe of radius R has a velocity that is everywhere parallel to the axis (centerline) of the pipe. The velocity distribution along the radial direction is Vr = U(1 - (r² / R²)), where r is the radial distance as measured from the pipe axis and U is the maximum velocity at r = 0. The average velocity of the fluid in the pipe is

U / 2

U / 3

U / 4

(5/6)U

(a) is the correct answer.

Ques 37 GATE 2021 SET-1

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

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

The MPN of coliform organisms per 100 mL is

1100000

110000

1100

110

(b) is the correct answer.

Ques 38 GATE 2021 SET-1

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?

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.

(d) is the correct answer.

Ques 39 GATE 2021 SET-1

On a road, the speed - density relationship of a traffic stream is given by u = 70 - 0.7k (where speed, u, is in km/h and density, k, is in veh/km). At the capacity condition, the average time headway will be

0.5 s

1.0 s

1.6 s

2.1 s

(d) is the correct answer.

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