Civil Engineering
GATE CE topic:infrastructure PYQs
Build your understanding with focused practice from past exam papers.
Questions 341–350 of 1300. Imported answers require independent review unless marked reviewed.
Question 41
Open questionce-1MCQ2 marksNeeds review
A vertical smooth rigid retaining wall is supporting horizontal ground with dry cohesionless backfill having a friction angle of
. The inclinations of failure planes with respect to the major principal plane for Rankine’s active and passive earth pressure conditions, respectively, areYour answerChoose one option.
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A round-bottom triangular lined canal is to be laid at a slope of 1 in 1500, to carry a discharge of 25 m³/s. The side slopes of the canal cross-section are to be kept at 1.25H : 1V. If Manning’s roughness coefficient is 0.013, the flow depth (in meters) will be in the range of
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A flow velocity field
for a fluid is represented by
In the context of the fluid and the flow, which one of the following statements is CORRECT?
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A hypothetical multimedia filter, consisting of anthracite particles (specific gravity: 1.50), silica sand (specific gravity: 2.60), and ilmenite sand (specific gravity: 4.20), is to be designed for treating water/wastewater. After backwashing, the particles should settle forming three layers: coarse anthracite particles at the top of the bed, silica sand in the middle, and small ilmenite sand particles at the bottom of the bed.
Assume
(i) Slow discrete settling (Stoke’s law is applicable)
(ii) All particles are spherical
(iii) Diameter of silica sand particles is 0.20 mm
The CORRECT option fulfilling the diameter requirements for this filter media is
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For assessing the compliance with the emissions standards of incineration plants, a correction needs to be applied to the measured concentrations of air pollutants. The emission standard (based on 11% Oxygen) for HCl is 50 mg/Nm³ and the measured concentrations of HCl and Oxygen in flue gas are 42 mg/Nm³ and 13%, respectively.
Assuming 21% Oxygen in air, the CORRECT statement is:
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The consolidated data of a spot speed study for a certain stretch of a highway is given in the table.
Speed range (kmph) | Number of observations |
|---|---|
0 - 10 | 7 |
10 - 20 | 31 |
20 - 30 | 76 |
30 - 40 | 129 |
40 - 50 | 104 |
50 - 60 | 78 |
60 - 70 | 29 |
70 - 80 | 24 |
80 - 90 | 13 |
90 - 100 | 9 |
The “upper speed limit” (in kmph) for the traffic sign is
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The free mean speed is 60 km/hr on a given road. The average space headway at jam density on this road is 8 m. For a linear speed-density relationship, the maximum flow (in veh/hr/lane) expected on the road is
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Open questionCE2MSQ2 marksNeeds review
Three vectors
,
, and
are given as
Which of the following is/are CORRECT?
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A map is prepared with a scale of 1: 1000 and a contour interval of 1 m. If the distance between two adjacent contours on the map is 10 mm, the slope of the ground between the adjacent contours is
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Open questionCE2MSQ2 marksNeeds review
Consider the statements P, Q, and R.
P: Compacted fine-grained soils with flocculated structure have isotropic permeability.
Q: Phreatic surface/line is the line along which the pore water pressure is always maximum.
R: The piping phenomenon occurring below the dam foundation is typically known as blowout piping.
Which of the following option(s) is/are CORRECT?
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