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GATE CE 2026 Set 1

All 65 solved GATE CE 2026 Set 1 questions in exam order. Open a question, commit to an answer, and learn from the step-by-step solution. One question at a time.

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Questions

65

Paper marks

100

Question formats

3

MCQ · NAT · MSQ

Revision mode

Self-paced

No timer. Focus on understanding.

Difficulty mixEasy 24Medium 35Hard 6

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65 of 65 questions

General Aptitude (GA)

10
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    Question

    ‘The shopkeeper sells lemons.’
    In this sentence, the word ‘lemons’ is the ________.
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    Question

    The figure below is supposed to show three non-overlapping shapes – one oval and two triangles. Which one of the following figures P, Q, R, or S fits the missing portion indicated by ‘?’ and completes the oval and the two triangles?
    A diagram showing fragments of an oval and two triangles with a central missing piece marked '?'
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    Question

    At how many points will the curves y=x2y = x^2 and y=−x2−2x−1y = -x^2 - 2x - 1 intersect in the real (x,y)(x, y) plane?
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    Question

    ‘If Anish had scored hundred runs in today’s match, he would have been made the captain of his team. He would have then become the youngest captain in his team’s history. Unfortunately, he got out without scoring any runs. Hence, there won’t be any change in the captaincy for now.’
    Based on the paragraph above, which one of the following statements is true?
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    Question

    Which one of the following figures P, Q, R, or S, correctly shows the 45∘45^\circ clockwise-rotated version of figure (I)?
    Figure (I)
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    Question

    Match the words in Column I with their synonyms in Column II.
    Column IColumn II
    (i) Lonely(p) Verbatim
    (ii) Literal(q) Solitary
    (iii) Lousy(r) Deadly
    (iv) Lethal(s) Terrible
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    Question

    In the given figure, PQ‾\overline{PQ} is the diameter of a circle with center OO. Two points RR and SS are chosen on the circle such that ∠ROS=80∘\angle ROS = 80^\circ. When PR‾\overline{PR} and QS‾\overline{QS} are extended, they meet at TT. The value of ∠RTS\angle RTS is _________________
    A circle with diameter PQ and center O. Points R and S are on the circle. PR and QS are extended to meet at point T outside the circle. Angle ROS is marked as 80 degrees.
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    Question

    Based on the relationship between each polygon and the number inside it, the value of ‘X’ is ______
    A sequence of polygons: a triangle with 6 inside, a rectangle with 24 inside, a pentagon with 120 inside, and a hexagon with X inside.
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    Question

    Consider a linear arrangement of seven bulbs, each of which can be in the ON or OFF states. The initial configuration of the bulbs is shown in the figure. In every Step, the states of the bulbs are changed based on the following rules:
    • Any OFF bulb with exactly one ON neighbor at the end of the previous Step is turned ON.
    • Any ON bulb with both neighbors ON at the end of the previous Step is turned OFF.
    • The state of any bulb not meeting the conditions above is left unchanged.
    The state of bulbs at the end of Step 1 and Step 2 are also shown in the figure. The number of bulbs which are ON at the end of Step 8 is ______
    Diagram showing initial state and steps 1 and 2 for a row of 7 bulbs. Legend indicates white circle is ON and black circle is OFF. Initial: 0001000. Step 1: 0011100. Step 2: 0110110.
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    Question

    PP and QQ are two positive integers such that P2=Q2+13P^2 = Q^2 + 13.
    The product of the numbers PP and QQ is _________
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Civil Engineering (CE1)

55
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    Question

    Matrix PP is given asP=[101010101]P = \begin{bmatrix} 1 & 0 & 1 \\ 0 & 1 & 0 \\ 1 & 0 & 1 \end{bmatrix}The TRUE option is
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    Question

    Given:[111102]{x1x2x3}={00}\begin{bmatrix} 1 & 1 & 1 \\ 1 & 0 & 2 \end{bmatrix} \begin{Bmatrix} x_1 \\ x_2 \\ x_3 \end{Bmatrix} = \begin{Bmatrix} 0 \\ 0 \end{Bmatrix}The above system of equations represents a
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    Question

    A thin-walled spherical gas balloon of radius RR and wall thickness tt (t≪Rt \ll R) is subjected to an internal (gauge) pressure pp. The maximum tensile and shear stresses in the balloon wall are, respectively:
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    Question

    Black dot shown in the figure qualitatively represents the shear centre of the angle section. The option which represents the position of the shear centre is:
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    Question

    Which one of the following is utilized to determine the long-term deformation of concrete under sustained loading?
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    Question

    Two reservoirs having different water levels are connected by two long parallel pipelines of same length and same material but having diameters of 600 mm and 400 mm. Using Darcy-Weisbach equation, the ratio of flowrate of water in the bigger diameter pipe to that in the smaller diameter pipe is
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    Question

    An irrigation canal is to be designed to deliver 10 cumec to meet the peak demand of 7500 hectare of cropped area. The estimated canal losses are 50 % of the head discharge. The duty (in hectare/cumec) on capacity of this canal is
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    Question

    The name of a person in Column 1 is to be matched with the test mentioned in Column 2.
    Column 1Column 2
    (I) Menard(P) Dilatometer test
    (II) Marchetti(Q) Pressuremeter test
    (III) Casagrande(R) Compaction test
    (IV) Proctor(S) Liquid limit test
    Option giving the CORRECT match between Column 1 and Column 2 is:
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    Question

    Corrections are applied to the basic length of the runway strip considering:
    (i) The elevation HH (in m) of the airport above Mean Sea Level (MSL)
    (ii) Corrected air temperature TT (in ∘^\circ C) with respect to the standard temperature at elevation HH
    (iii) The effective gradient GG (in %) along the length of the runway
    Respective correction applied to the basic length of the runway is:
    1. A.
      0.07×H300;0.01×T;0.10×G0.07 \times \frac{H}{300} ; 0.01 \times T ; 0.10 \times G
    2. B.
      0.01×H300;0.07×T;0.10×G0.01 \times \frac{H}{300} ; 0.07 \times T ; 0.10 \times G
    3. C.
      0.07×H300;0.10×T;0.01×G0.07 \times \frac{H}{300} ; 0.10 \times T ; 0.01 \times G
    4. D.
      0.10×H300;0.07×T;0.01×G0.10 \times \frac{H}{300} ; 0.07 \times T ; 0.01 \times G

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    Question

    The Whole Circle Bearing (WCB) of line ABAB is 150∘150^\circ. The length of ABAB is 100 m. The latitude and departure values, respectively, for this line are:
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    Question

    A rapid sand filter bed of depth 0.80.8 m has 4040 % porosity during service cycle. It is recommended that during backwash operation, the expanded filter bed should have 7070 % porosity. The uniform expanded depth (in m) of the filter bed during backwash is
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    Question

    The settling velocity of inorganic particles in the sedimentation tank of a water treatment plant is governed by
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    Question

    Gradually Varied Flow (GVF) profiles in open channels given in Column 1 are to be matched with the water surface slopes in Column 2 in the table below.
    Column 1Column 2
    GVF ProfileWater Surface Slope
    (P) M1(I) Positive
    (Q) M2(II) Negative
    (R) M3(III) Zero
    Which of the following options is/are NOT correct?
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    Question

    Cant CC on a Broad Gauge railway track is calculated for an equilibrium speed VV (in km/h), dynamic gauge GG (in mm) and radius of curve RR (in m) using formula/formulae:
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    Question

    Which of the following components is/are NOT removed in the secondary treatment of sewage?
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    Question

    Bag I contains 4 white and 6 black balls.
    Bag II contains 4 white and 3 black balls.
    One ball is drawn at random from any one of the two bags and it is found to be a black ball. The probability that the black ball was drawn from Bag I is ______ (rounded off to two decimal places).
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    Question

    A matrix is given as:[9151550]\begin{bmatrix} 9 & 15 \\ 15 & 50 \end{bmatrix}By performing Cholesky decomposition, ∣l22∣|l_{22}| of the lower triangular matrix is ______ (in integer).
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    Question

    It is given that xx and yy are integers in the following equation:(x+y−7)2+(y+3x−13)2=0(x + y - 7)^2 + (y + 3x - 13)^2 = 0The value of (x3+y3)(x^3 + y^3) is ________ (in integer).
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    Question

    The required centre-to-centre spacing of 10 mm diameter bars is 150 mm to resist the design moment in a concrete slab. Instead of 10 mm diameter bars, if 12 mm diameter bars of the same grade are used, the required centre-to-centre spacing (in mm) to resist the same design moment becomes ________ (rounded off to the nearest integer).
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    Question

    Two steel plates are to be connected together by a 5 mm fillet weld of length 150 mm to transfer a design load. If the size of the fillet weld used to connect the same two plates is changed to 6 mm, the weld length (in mm) needed for transferring the same design load is ________ (in integer).
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    Question

    For a liquid, the permeability of a sandy soil having a void ratio of 0.600.60 was determined as 0.140.14 cm/s. Considering the same liquid and by using Taylor’s equation, the permeability (in cm/s) of this soil corresponding to the void ratio of 0.800.80 is _____ (rounded off to two decimal places).
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    Question

    To obtain undisturbed clay soil sample, an Area Ratio of 10%10 \% needs to be achieved for a thin walled sampling tube. If the outer diameter of the tube is 50.850.8 mm, the inner diameter (in mm) is __________________ (rounded off to one decimal place).
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    Question

    The travel times of three vehicles on a 22 km stretch of road are 44, 55, and 88 minutes. Assuming the speed of each vehicle to be constant in this stretch, the Space Mean Speed (in km/h) of the vehicles is ___________ (rounded off to two decimal places).
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    Question

    A 30 m long tape is standardized at 25 ∘^\circ C. It was used to measure the length of a line which came out to be 200 m. The temperature during the measurement was 35 ∘^\circ C. The coefficient of expansion of the tape was 11×10−611 \times 10^{-6} per ∘^\circ C. The correction in the measured length (in mm) due to change in temperature is ______ (in integer).
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    Question

    The height of the plane of collimation of a levelling instrument is 100.000 m from a datum. The levelling instrument measures a Back Sight of 1.500 m on a vertically held staff at a ground point PP. The reduced level (in m) of the ground point PP with respect to the datum is ________________ (rounded off to three decimal places).
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    Question

    Let f(x)f(x) be a continuous function defined in [0,2]→R[0,2] \rightarrow \mathbb{R} and satisfying the equation∫02f(x)[x−f(x)]dx=23.\int_{0}^{2} f(x)[x - f(x)]dx = \frac{2}{3}.The value of f(1)f(1) is
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    Question

    An ordinary differential equation is given below.x2d2ydx2=6yx^2 \frac{d^2y}{dx^2} = 6yConsidering aa and bb as arbitrary constants, the general solution of the equation is
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    Question

    A plane truss consists of two linearly elastic, homogeneous, identical members, namely PQ and QR. Both members have length (LL), cross-sectional area (AA), and modulus of elasticity (EE). The members are inclined at 45∘45^\circ as shown in the figure. The truss has hinge supports at P and R. The translational degrees-of-freedom (uu and vv) are shown at joint Q.
    Plane truss with two members PQ and QR inclined at 45 degrees, joint Q has degrees of freedom u and v
    (Figure not to scale)
    After application of the boundary conditions, the stiffness matrix of the truss becomes:
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    Question

    The plane frame has a hinge and a roller support, and is loaded as shown in the figure. Both the columns have same height.
    Plane frame with horizontal load 50 kN at top left joint and vertical load 90 kN at mid-span of horizontal beam. Dimensions: 2m, 2m for beam segments, 3m for columns. Hinge at left base, roller at right base.
    (Figure not to scale)
    What is the absolute value of the maximum bending moment (in kN-m) in the frame?
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    Question

    For a hydraulic jump formed in a rectangular horizontal channel, the sequent depth ratio is 2. The Froude number of supercritical stream is
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    Question

    In a laminar flow of a Newtonian fluid through a circular pipe of radius 5 cm, the maximum velocity is found to be 2 m/s. The velocity (in m/s) at a radial distance of 2.50 cm from the axis of the pipe is
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    Question

    A road is divided into four sections having varying widths as shown in the figure. Section-2 (S2S2) represents a capacity constrained condition with respect to the traffic flow passing through Section-1 (S1S1). Section-3 (S3S3) and Section-4 (S4S4) do not face any such capacity constraint with respect to the flow. A flow-density relationship for unconstrained and constrained flow conditions is shown in the figure.
    Road sections S1-S4 and flow-density relationship graph
    If Section-1 observes density D2D2, the option representing the correct state of density in Sections 2, 3 and 4 is:
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    Question

    Locations PP and QQ are separated by a wide valley. The difference in levels of locations PP and QQ measured by a levelling instrument stationed near PP is 3.0 m3.0\text{ m}. The same instrument stationed near QQ measures the difference in levels of locations PP and QQ as −1.0 m-1.0\text{ m}. Assume that the atmospheric refraction is same during the measurements. The true difference in levels (in m) of locations PP and QQ is
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    Question

    The average sewage from a city is 90 million litres per day90\text{ million litres per day} and the average 5-day Biochemical Oxygen Demand (BOD5\text{BOD}_5) is 300 mg/l300\text{ mg/l}. Average standard BOD5\text{BOD}_5 of the domestic sewage is 0.08 kg/day/person0.08\text{ kg/day/person}. The population equivalent of the city is
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    Question

    Select ALL CORRECT option(s) which can be considered to check whether the flexural stresses in a prestressed concrete beam are within the allowable stresses at the transfer and the service stages.
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    Question

    As per the Rankine’s earth pressure theory, which of the following statements is/are FALSE?
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    Which of the following statements is/are TRUE in the context of the geometric design of highways?
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    Question

    Starting with the first approximation as x=0.5x = 0.5, the second approximation for the root of the following function by the Newton-Raphson method is ______ (rounded off to two decimal places).f(x)=e−x−xf(x) = e^{-x} - x
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    Question

    Values of yy for different values of xx are tabulated below.
    xx−2-21122
    yy2828441616
    If a second-degree interpolating polynomial P2(x)P_2(x) is used to represent yy, the value of P2(0)P_2(0) is ___________ (rounded off to the nearest integer).
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    Question

    Two identical blocks A and B are connected by a rigid rod. The blocks rest against vertical and horizontal planes, as shown in the figure. The coefficient of static friction at the vertical and horizontal planes is the same. If the sliding impends when θ=45∘\theta = 45^\circ, the value of the coefficient of static friction is ______ (rounded off to two decimal places).
    Two identical blocks A and B connected by a rigid rod against a vertical wall and horizontal floor.
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    Question

    A homogenous, linearly elastic rod AB is connected to a linearly elastic spring BC in between the fixed supports at A and C, as shown in the figure. The cross-sectional area, modulus of elasticity, and the coefficient of thermal expansion of the rod AB are 500 mm2500\text{ mm}^2, 60×103 MPa60 \times 10^3\text{ MPa}, and 12×10−6 per ∘C12 \times 10^{-6}\text{ per }^\circ\text{C}, respectively. The stiffness (k) of spring BC is 2500 N/mm2500\text{ N/mm}.
    A diagram showing a rod AB of length 3 m connected in series with a spring BC of stiffness k = 2500 N/mm between two fixed supports at A and C.
    The internal force (in kN) that will develop in the spring BC when the temperature of rod AB is increased by 100∘C100^\circ\text{C} is _________ (rounded off to one decimal place).
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    Question

    The cross-section of a steel T-beam is shown in the figure where all dimensions are in mm.
    A T-shaped cross-section with a flange of width 100 mm and thickness 20 mm, and a web of depth 100 mm and thickness 20 mm.
    (Figure not to scale)
    The plastic section modulus of the given cross-section is _________ ×104 mm3\times 10^4\text{ mm}^3 (in integer).
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    Question

    A fully-penetrating well of 20 cm20\text{ cm} diameter is provided in an unconfined aquifer. The height of the ground water table is 30 m30\text{ m} from the bottom of the aquifer. After a long period of pumping at a rate of 63 m3/s63\text{ m}^3\text{/s}, the drawdown in the observation wells at 10 m10\text{ m} and 100 m100\text{ m} from the pumped well is 12 m12\text{ m} and 11 m11\text{ m}, respectively. The transmissibility (in m2/s\text{m}^2\text{/s}) of the aquifer is ______ (rounded off to one decimal place).
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    Question

    A wide unlined channel carries sediment-free water. The depth of water is 1 m1\text{ m}. The specific weight of water is 10 kN/m310\text{ kN/m}^3. To prevent scouring, the maximum permissible tractive stress on bed is 10 N/m210\text{ N/m}^2. The maximum slope of the channel bed to prevent scouring is 11 in nn. The value of nn is ______ (in integer).
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    Question

    A bridge with an expected life of 50 years is designed for a flood of 10000 m3/s10000\text{ m}^3/\text{s} corresponding to the return period of 100 years. The risk associated with this design is _____________ (rounded off to two decimal places).
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    An infinite slope with slope angle β=22∘\beta = 22^\circ consists of soil with the following properties:
    Unit weight γ=15.72 kN/m3\gamma = 15.72\text{ kN/m}^3
    Cohesion c′=12 kPac' = 12\text{ kPa}
    Angle of internal friction ϕ′=15∘\phi' = 15^\circThe critical height of the slope (in m) is ______ (rounded off to two decimal places).
    Your answer

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    Question

    An infinite slope with slope angle β=22∘\beta = 22^\circ consists of soil with the following properties:
    Unit weight γ=15.72 kN/m3\gamma = 15.72\text{ kN/m}^3
    Cohesion c′=12 kPac' = 12\text{ kPa}
    Angle of internal friction ϕ′=15∘\phi' = 15^\circThe critical height of the slope (in m) is ______ (rounded off to two decimal places).
    Your answer

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    A group of 25 circular piles is arranged in 5×55 \times 5 uniform pattern in a soft clay soil with equal spacing in both the directions. These are friction piles with negligible end bearing.
    Consider the following details:
    Diameter of each pile = 1 m
    Length of each pile = 15 m
    Cohesion of the soil = 20 kN/m220\text{ kN/m}^2
    Unit weight of the soil = 16 kN/m316\text{ kN/m}^3
    Adhesion factor = 0.75
    Considering the efficiency of the pile group as unity, the optimum value of the ratio of the pile spacing to pile diameter is __________________ (rounded off to one decimal place).
    Your answer

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    A shallow strip footing of width 2 m is embedded at a depth of 1.5 m below the ground surface in a homogeneous pure clay with an angle of internal friction zero. Consider unit weight of soil as 20 kN/m320\text{ kN/m}^3 and undrained cohesion of soil as 20 kN/m220\text{ kN/m}^2.
    Due to rise of ground water table from far below the founding depth to the ground surface in monsoon season, the magnitude of percentage change in the net ultimate bearing capacity as per Terzaghi’s theory is __________________ (rounded off to two decimal places).
    Your answer

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    Traffic is moving on a 66-lane dual carriageway road. Traffic volume per direction during peak hour (08:0008:00 am to 09:0009:00 am) is 60006000 veh/h. It is assumed that the traffic is distributed uniformly across the lanes in each direction. Just at 08:0008:00 am, a truck goes out of order on the middle lane of one side, thus disrupting the traffic on that lane in one direction. The lane capacity under normal conditions is 20002000 veh/h/ln and under queue formation it is 16001600 veh/h/ln. The traffic resumes at 08:3008:30 am on removing the truck from the middle lane. Hourly traffic volume after 09:0009:00 am reduces to 50005000 veh/h/dir.
    The number of vehicles in the queue at 10:0010:00 am is ______ (in integer).
    Your answer

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    In a bituminous mix, the percentage by weight of coarse aggregate, fine aggregate, filler, and bituminous binder is 5858, 2525, 1212, and 55, respectively. The corresponding specific gravity of these materials is 2.682.68, 2.452.45, 2.422.42, and 1.151.15. The bulk specific gravity of the mix is 2.22.2.
    The Voids Filled with Bitumen (VFB, in percentage) is __________ (rounded off to the nearest integer).
    Your answer

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    Question

    The following consecutive readings (in m) were taken with a dumpy level and a levelling staff at a common interval of 20 m:
    0.385; 1.030; 1.925; 2.825; 3.730; 4.850; 1.045; 2.005; 3.330; 4.580
    The dumpy level was shifted after taking the sixth reading.
    The gradient (in %) of the ground between the first and the last location of the reading is ______ (in integer).
    Your answer

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    An Activated Sludge Process (ASP) has an inlet wastewater flowrate of 20000 m3/day20000\text{ m}^3/\text{day} with a Biochemical Oxygen Demand (BOD) concentration of 250 mg/l250\text{ mg/l}. It produces treated wastewater containing 20 mg/l20\text{ mg/l} BOD. The aeration tank has a working volume of 6000 m36000\text{ m}^3 and a biomass concentration of 3000 mg/l3000\text{ mg/l}. Biological Sludge Residence Time (BSRT) of the system is 6 days6\text{ days}. The influent wastewater and the treated effluent from the system have negligible concentrations of biomass. The sludge recycle line from the bottom of the Secondary Sedimentation Tank (SST) to the inlet of the aeration tank has a flowrate of 6000 m3/day6000\text{ m}^3/\text{day}.
    To maintain equilibrium, the flowrate (in m3/day\text{m}^3/\text{day}) of sludge that is to be wasted from the system is ______ (in integer).
    Your answer

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    The intensity-duration relationship for a rainfall on a rectangular plot ABCD of area 7 ha7\text{ ha} (1 ha=104 m21\text{ ha} = 10^4\text{ m}^2) can be modelled by the following equation:I=25(t+10)I = \frac{25}{(t + 10)}where II is rainfall intensity (in cm/h\text{cm/h}), and tt is the duration (in minutes) of rainfall. The average runoff coefficient over the area is 0.600.60. The time of entry (in minutes) to the outfall from the corners A, B, C, and D is 10,20,1510, 20, 15 and 2525, respectively.
    The design flowrate (in m3/h\text{m}^3/\text{h}) of the storm-sewer at the outfall is _____ (in integer).
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    The maximum demand at a water purification plant has been estimated as 12 million litres per day. For the raw supplies, a rectangular sedimentation tank is to be designed with mechanical sludge removal arrangement. Consider depth of the tank as 4 m, detention period as 6 hours, and velocity of flow as 0.003 m/s.
    The width (in m) of the detention tank is _________ (rounded off to two decimal places).
    Your answer

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