GATE 2020 CE (CE1) – Previous Year Questions with Solutions
All 65 questions of GATE 2020 CE (CE1) with answers and explanations. Read each question, then practise it by topic or as a full paper.
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- Question 1 – It is a common criticism that most academicians live in their , so they are not aware of real-life challenges.
- Question 2 – His hunger for reading is insatiable. He reads indiscriminately. He is most certainly a/an reader.
- Question 3 – Select the word fitting the analogy: Fuse : Fusion :: Use : .
- Question 4 – If 0, 1, 2, …, 7, 8, 9 are coded as O, P, Q, …, V, W, X, then 45 is coded as .
- Question 5 – Two positive numbers sum to 100. Subtracting 5 from each makes the product zero. Which is one original number?
- Question 6 – The American psychologist Howard Gardner expounds that human intelligence can be sub-categorised into multiple kinds, in such a way that individuals…
- Question 7 – Five friends P, Q, R, S and T camped and had to sleep in a row inside a tent. P, Q and T refused to sleep next to R because he snored loudly. P and S…
- Question 8 – Insert seven numbers between 2 and 34 so the resulting sequence, including the endpoints, is an arithmetic progression. Find the sum of the inserted…
- Question 9 – Find the units digit of 26591749110016.
- Question 10 – The pie chart shows a family’s monthly expenditure. Find how much extra is spent on education compared with transport, in percent.
- Question 11 – In D()2 z2+ K() z- t=0, θ is a function of t and z, and D and K are functions of θ. Classify the equation.
- Question 12 – Evaluate x(x2-5x+4)/(4x2+2x).
- Question 13 – True ln(2) is 0.69. Estimate ln(2) by linear interpolation between ln(1) and ln(6). Find absolute percentage error, rounded to the nearest integer.
- Question 14 – Find area enclosed by x2/a2+y2/b2=1.
- Question 15 – The planar truss is shown, not to scale. Neglecting member self-weight, find the number of zero-force members under load P.
- Question 16 – A reinforcing steel bar, partially embedded in concrete, is subjected to tensile force P. Which figure represents the magnitude distribution of bond…
- Question 17 – A two-dimensional stress state at P is []=bmatrix xx& xy\\ xy& yybmatrix. Find the necessary and sufficient condition for pure shear on rotated axes.
- Question 18 – As dicalcium silicate (C 2S) content in cement clinker increases, heat of hydration .
- Question 19 – The Los Angeles test for stone aggregates examines .
- Question 20 – Which statement is NOT correct?
- Question 21 – SPT is performed every 1.5 m to 30 m depth. At depth 3 m, blows for three successive 150 mm penetrations are 8, 6 and 9. Find recorded N at 3 m.
- Question 22 – Darcy’s law makes velocity proportional to the first power of hydraulic gradient. It applies to .
- Question 23 – A body floating in liquid is in stable equilibrium when its .
- Question 24 – Uniform flow of speed U makes angle θ with the y-axis as shown. Find velocity potential φ.
- Question 25 – For one month an agricultural field has pan evaporation 100 mm, effective rainfall 20 mm after runoff/deep-percolation losses, crop coefficient 0.4…
- Question 26 – Aqueous chlorine reacts with water: Cl 2+H 2O HOCl+Cl-+H+. Which is the most active disinfectant?
- Question 27 – 35.67 mg HCl is added to distilled water to make 1 litre solution. Atomic weights H = 1 and Cl = 35.5. Neglect water dissociation. Find pH.
- Question 28 – Find probability that a 50-year flood does NOT occur at all during 25 project years, to two decimal places.
- Question 29 – The shown planar elastic parabolic structure has span 8.0 m, rise 2.4 m and uniformly distributed load 12 kN/m. Neglect self-weight. Find maximum…
- Question 30 – An urban median separates opposing traffic streams. As per IRC:86-1983, find desirable minimum median width (m), expressed as an integer.
- Question 31 – A hill road has 4.5% gradient and a horizontal curve of radius 100 m. The gradient must be eased for combined horizontal and vertical curvature. As…
- Question 32 – A sand sample fails in drained triaxial compression at deviator stress 150 kPa and confining pressure 50 kPa. Find friction angle (degrees), nearest…
- Question 33 – A fully submerged infinite sandy slope has inclination 30°, saturated unit weight 18 kN/m³ and effective friction angle 38°. Water unit weight is 10…
- Question 34 – A 4 m wide rectangular channel carries 6 m³/s. Manning n = 0.02 and g = 9.81 m/s². Find critical velocity (m/s), to two decimals.
- Question 35 – A river carries 1000 MLD with BOD5 = 5 mg/L and DO = 8 mg/L. Saturation DO is 10 mg/L. Wastewater enters at 100 MLD with BOD5 = 200 mg/L and DO = 2…
- Question 36 – Solve x-5x+6x=0 with x(0) = 0 and x(0)=10.
- Question 37 – For a continuous function f, choose the fourth-order central finite-difference approximation to f(x i), with step h.
- Question 38 – A distributed load 50 kN/m may occupy any continuous or separate patches on girder PQRST shown. Find maximum negative (hogging) bending moment at R…
- Question 39 – The shown rigid weightless platform PQRS slides freely vertically, held by weightless member OJ and four weightless frictionless rollers. O and J are…
- Question 40 – The shown cantilever PQ of uniform flexural rigidity EI has concentrated moment M at midpoint R. Find free-end Q deflection.
- Question 41 – A dowel is placed at a concrete contraction joint. Contraction cracks occur at predetermined locations. Which arrangement shows correct dowel…
- Question 42 – Traffic flow q and density D are related as shown. Which depicts the shock-wave condition?
- Question 43 – Clearway design length is calculated for normal take-off. Which diagram correctly depicts the clearway? Figures are not to scale.
- Question 44 – The shown total-stress paths start from isotropic consolidation O, with p=( 1+2 3)/3, q= 1- 3. Loading conditions: I compression loading ( 1…
- Question 45 – The shown 10 m soil profile receives instantaneous uniform surcharge 70 kPa. Groundwater is 3 m below ground. Layer unit weights are shown; take water…
- Question 46 – A hydraulic jump occurs in a 6 m wide rectangular channel carrying 12 m³/s, with upstream depth 30 cm. Take g = 9.81 m/s² and water density 1000…
- Question 47 – A water scheme transports 10 MLD through a 450 mm pipe for 2.5 km. Chlorine dose at entry is 3.50 mg/L for the required downstream disinfection. Flow…
- Question 48 – Open traverse PQRST has consecutive coordinates (m): PQ N110.2 E45.5; QR N80.6 W60.1; RS S90.7 W70.8; ST S105.4 E55.5. Starting P has…
- Question 49 – C is the straight segment from (0,0,0) to (1,1,1). Evaluate C[(y+z)dx+(x+z)dy+(x+y)dz], expressed as an integer.
- Question 50 – For bmatrix1&3&2\\2&2&-3\\4&4&-6\\2&5&2bmatrixbmatrixx 1\ 2\ 3bmatrix=bmatrix1\\1\\2\\1bmatrix, find x 3, nearest integer.
- Question 51 – A rigid uniform weightless horizontal bar connects three vertical members P, Q and R, each of axial stiffness 10 kN/mm. P and R rest on a rigid…
- Question 52 – The doubly symmetric built-up section shown has flange/web plates joined by continuous 10 mm fillet welds. About X–X, I=7.73106 mm⁴. Permissible weld…
- Question 53 – The shown singly reinforced concrete beam uses M25 concrete and Fe500 steel. Tension-steel area is 942 mm². As per IS 456:2000 limit-state design,…
- Question 54 – A simply supported prismatic rectangular concrete beam of span 8 m has effective prestressing force 600 kN. Tendon eccentricity is zero at supports…
- Question 55 – Traffic on a 2-lane road requires upgrading for severe flow. Maximum service flow is 1280 vehicles/h/lane at level C. Peak-hour factor is 0.78125,…
- Question 56 – A 5 m high vertical retaining wall supports soil with unit weight 18 kN/m³, effective cohesion 12 kPa and effective friction angle 30°. Using Rankine…
- Question 57 – Upward water flow passes through 2.5 m saturated sand in the shown tank. Sand void ratio is 0.58, specific gravity 2.7 and water unit weight 10 kN/m³.…
- Question 58 – A submerged 10 m clay layer rests on 3 m sand over an impervious stratum as shown. A 2 m fill of unit weight 20 kN/m³ is placed above the clay. Clay c…
- Question 59 – Reservoirs P, Q and R connect through pipes at junction S as shown. Piezometric head at S is 100 m; pipe S–R length is 180 m. Take g = 9.81 m/s² and…
- Question 60 – An unconfined homogeneous aquifer of area 3.00 km² initially has water table elevation 102.00 m. Natural recharge of 0.90 million m³ raises it to…
- Question 61 – A 2 m diameter circular tank has a 0.1 m diameter bottom orifice with discharge coefficient 0.8. Inflow is steady at 20 L/s. Take g = 9.81 m/s² and…
- Question 62 – A primary discrete-settling tank has surface overflow rate 20000 L/(m²·day). Water kinematic viscosity is 0.0101 cm²/s; particle specific gravity is…
- Question 63 – A gas concentration is 41.6 μmol/m³ at 1 atm and 293 K. With R=82.0510-6 m³·atm/(mol·K) and ideal gas behavior, find concentration (ppm), to one…
- Question 64 – A stream carries 5 m³/s with ultimate BOD 30 mg/L. Wastewater of 0.20 m³/s and BOD5 = 500 mg/L mixes instantly and completely. Stream area remains 40…
- Question 65 – Traverse PQRS has lengths and whole-circle bearings: PQ 40 m at 80°, QR 50 m at 10°, RS 30 m at 210°. Find closing segment SP length (m), to two…