Civil Engineering GATE 2025 Set 1 Questions with Answer

Ques 14 Environmental Engineering

The Surface Overflow Rate (SOR) in a rectangular sedimentation tank is 45 m³/m²/d. Minimum diameters of spherical inorganic and organic particles expected to be completely removed in this tank are calculated. Assume that Stoke's law is applicable. Which of the following options is/are correct:
Specific gravity of inorganic particles =2.65
Specific gravity of organic particles =1.20
Acceleration due to gravity (g)=9.81 m/s²
Kinematic viscosity (ν)=1×10^-6 m²/s

Ques 15 Environmental Engineering

Aeration is employed as a treatment option for the removal of several pollutants from contaminated water.
Identify the pollutant(s), where aeration is employed as a part of their removal:

Ques 16 Environmental Engineering

MgCl₂ and CaSO₄ salts are added to 1 litre of distilled deionized water and mixed until completely dissolved. Total Dissolved Solids (TDS) concentration is 500 mg/l and Total Hardness (TH) is 400 mg/l (as CaCO₃). The amounts of MgCl₂ and CaSO₄ added are calculated (rounded off to the nearest integer). Which of the following options is/are true:
Atomic weights: Ca(40), Mg(24), S(32) O(16), Cl(35.5), C(12)

Ques 17 Environmental Engineering

A facultative pond system is employed for wastewater treatment. Which of the following statements is/are true:

Ques 18 Environmental Engineering

Organic fraction of municipal solid waste (OFMSW) with bulk density of 315 kg/m² and water content of 30% is mixed with municipal sludge of bulk density 700 kg/m³ and water content of 70%, such that the water content of the mixture is 40%. The amount (in kg) of sludge to be mixed per kg of OFMSW (rounded off to 2 decimal places) and the density of the mixture (in kg/m³) (rounded off to the nearest integer) are calculated. Which of the following options is/are true:

Ques 19 Fluid Mechanics

For a flowing fluid, a dimensionless combination of velocity (V), length scale (l), and acceleration due to gravity (g) would be

Ques 20 Fluid Mechanics

For the Bernoulli's equation to be applicable in a fluid flow situation, which of the following conditions is/are to be satisfied:

Ques 21 Fluid Mechanics

A hydraulic jump is formed in a 5 m wide rectangular channel, which has a horizontal bed and is carrying a discharge of 15 m³/s. The depth of water upstream of the jump is 0.5 m. The power dissipated by the jump (in kW) is ______ (rounded off to the nearest integer).
Note:
Acceleration due to gravity =9.81 m/s²
Density of water =1000 kg/m³
Kinetic energy correction factor =1.0

Ques 22 Fluid Mechanics

A 5.0 m wide rectangular channel carries a discharge of 10 m³/s at a depth of 1.5 m under uniform flow. To produce critical flow conditions without affecting the upstream conditions, the channel bottom elevation should be raised (in m) by ______ (rounded off to 2 decimal places).
Assume that there is no loss of head at the raise, kinetic energy correction factor is 1.0, and acceleration due to gravity is 9.81 m/s².

Ques 23 General Aptitude

Is there any good show ______ television tonight?
Select the most appropriate option to complete the above sentence.

Ques 24 General Aptitude

As the police officer was found guilty of embezzlement, he was ____________ dismissed from the service in accordance with the Service Rules.
Select the most appropriate option to complete the above sentence.

Ques 25 General Aptitude

The sum of the following infinite series is:
1/1! + 1/2! + 1/3! + 1/4! + 1/5! + ···

Ques 26 General Aptitude

A thin wire is used to construct all the edges of a cube of 1 m side by bending, cutting and soldering the wire. If the wire is 12 m long, what is the minimum number of cuts required to construct the wire frame to form the cube?