Civil Engineering GATE 2015 Set-1 Questions with Answer

Ques 14 Environmental Engineering

Total Kjeldahl Nitrogen (TKN) concentration (mg / L as N) in domestic sewage is the sum of the concentrations of:

Ques 15 Environmental Engineering

Solid waste generated from an industry contains only two components, X and Y as shown in the table below:

Ques 16 Environmental Engineering

The concentration of Sulfur Dioxide (SO₂) in ambient atmosphere was measured as 30 μg/m³. Under the same conditions, the above SO₂ concentration expressed in ppm is _______.
Given: P/(RT) = 41.6 mol/m³ where, P = Pressure; T = Temperature; R = universal gas constant; Molecular weight of SO₂ = 64.

Ques 17 Environmental Engineering

Consider a primary sedimentation tank (PST) in a water treatment plant with Surface Overflow Rate (SOR) of 40 m³/m²/d. The diameter of the spherical particle which will have 90 percent theoretical removal efficiency in this tank is _______ μm. Assume that settling velocity of the particles in water is described by Stokes’s Law.
Given: Density of water = 1000 kg/m³; Density of particle = 2650 kg/m³; g = 9.81 m/s²; Kinematic viscosity of water (ν) = 1.10 x 10^-6 m²/s

Ques 18 Fluid Mechanics

In a two-dimensional steady flow field, in a certain region of the x-y plane, the velocity component in the x-direction is given by v_x = x² and the density varies as ρ = 1 / x. Which of the following is a valid expression for the velocity component in the y-direction, v_y?

Ques 19 Fluid Mechanics

For steady incompressible flow through a closed-conduit of uniform cross-section, the direction of flow will always be:

Ques 20 Fluid Mechanics

A circular pipe has a diameter of 1 m, bed slope of 1 in 1000, and Manning’s roughness coefficient equal to 0.01. It may be treated as an open channel flow when it is flowing just full, i.e., the water level just touches the crest. The discharge in this condition is denoted by Q_full. Similarly, the discharge when the pipe is flowing half-full, i.e., with a flow depth of 0.5 m, is denoted by Q_half. The ratio Q_full / Q_half is:

Ques 21 Fluid Mechanics

Two reservoirs are connected through a 930 m long, 0.3 m diameter pipe, which has a gate valve. The pipe entrance is sharp (loss coefficient = 0.5) and the valve is half-open (loss coefficient = 5.5). The head difference between the two reservoirs is 20 m. Assume the friction factor for the pipe as 0.03 and g = 10 m/s². The discharge in the pipe accounting for all minor and major losses is _______ m³/s.

Ques 22 Fluid Mechanics

A hydraulic jump is formed in a 2 m wide rectangular channel which is horizontal and frictionless. The post-jump depth and velocity are 0.8 m and 1 m/s, respectively. The pre-jump velocity is _______ m/s. (use g = 10 m/s²)

Ques 23 Fluid Mechanics

A short reach of a 2 m wide rectangular open channel has its bed level rising in the direction of flow at a slope of 1 in 10000. It carries a discharge of 4 m³/s and its Manning’s roughness coefficient is 0.01. The flow in this reach is gradually varying. At a certain section in this reach, the depth of flow was measured as 0.5 m. The rate of change of the water depth with distance, dy/dx, at this section is _______ (use g = 10 m/s²).

Ques 24 Fluid Mechanics

The drag force, F_D, on a sphere kept in a uniform flow field depends on the diameter of the sphere, D; flow velocity, V; fluid density, ρ; and dynamic viscosity, μ. Which of the following options represents the non-dimensional parameters which could be used to analyze this problem?

Ques 25 General Aptitude

Select the pair that best expresses a relationship similar to that expressed in the pair:
Children: Pediatrician

Ques 26 General Aptitude

The Tamil version of John Abraham-starrer Madras Cafe ______ by the Censor Board with no cuts last week, but the film’s distributors ______ no takers among the exhibitors for a release in Tamil Nadu ______ this Friday.