GATE CE 2017 Paper 1 — page 11

Questions 31–33 of 65. Imported answers require review unless explicitly marked reviewed.

A 1 m wide rectangular channel has a bed slope of 0.0016 and the Manning’s roughness coefficient is 0.04. Uniform flow takes place in the channel at a flow depth of 0.5 m. At a particular section, gradually varied flow (GVF) is observed and the flow depth is measured as 0.6 m. The GVF profile at that section is classified as

Your answerChoose one option.

S₁

S₂

M₁

M₂

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The following observations are made while testing aggregate for its suitability in pavement construction:

i. Mass of oven-dry aggregate in air = 1000 g ii. Mass of saturated surface-dry aggregate in air = 1025 g iii. Mass of saturated surface-dry aggregate under water = 625 g

Based on the above observations, the correct statement is

Your answerChoose one option.

bulk specific gravity of aggregate = 2.5 and water absorption = 2.5%

bulk specific gravity of aggregate = 2.5 and water absorption = 2.4%

apparent specific gravity of aggregate = 2.5 and water absorption = 2.5%

apparent specific gravity of aggregate = 2.5 and water absorption = 2.4%

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The queue length (in number of vehicles) versus time (in seconds) plot for an approach to a signalized intersection with the cycle length of 96 seconds is shown in the figure (not drawn to scale).

Diagram for Civil Engineering question 33

At time

, the light has just turned red. The effective green time is 36 seconds, during which vehicles discharge at the saturation flow rate,

(in vph). Vehicles arrive at a uniform rate,

(in vph), throughout the cycle. Which one of the following statements is TRUE?

Your answerChoose one option.

vph, and for this cycle, the average stopped delay per vehicle = 30 seconds

vph, and for this cycle, the average stopped delay per vehicle = 28.125 seconds

vph, and for this cycle, the average stopped delay per vehicle = 45 seconds

vph, and for this cycle, the average stopped delay per vehicle = 28.125 seconds

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2017 · Paper 1

Question 31

Question 32

Question 33