Civil Engineering Gate 2025 Set-1 Questions with Answer

Ques 14 GATE 2025 SET-1

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 GATE 2025 SET-1

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 GATE 2025 SET-1

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 GATE 2025 SET-1

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

Ques 18 GATE 2025 SET-1

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 GATE 2025 SET-1

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

Ques 20 GATE 2025 SET-1

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 GATE 2025 SET-1

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 GATE 2025 SET-1

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 GATE 2025 SET-1

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

Ques 24 GATE 2025 SET-1

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 GATE 2025 SET-1

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

Ques 26 GATE 2025 SET-1

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?