Civil Engineering
2025 · Paper 1
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Complete GATE CE 2025 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 31–33 of 65. Imported answers require review unless explicitly marked reviewed.
Question 31
Open questionCEMSQ1 markNeeds review
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
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Open questionCEMSQ1 markNeeds review
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:
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Open questionCENAT1 markNeeds review
If the weights retained on the 2.36 mm, 1.18 mm, 600
m, and 300
m sieves are 30%, 5%, 15%, and 20%, respectively, of the total weight of an aggregate sample, then the fineness modulus of the sample is __________ (rounded off to 2 decimal places).Log in to check the answer
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