GATE CE topic:infrastructure PYQs & Answers — Page 9

Questions 81–90 of 1300. Imported answers require independent review unless marked reviewed.

In a laminar flow of a Newtonian fluid through a circular pipe of radius 5 cm, the maximum velocity is found to be 2 m/s. The velocity (in m/s) at a radial distance of 2.50 cm from the axis of the pipe is

Your answerChoose one option.

1.00

1.25

1.50

1.75

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For the traverse given below, the benchmark is at ground point L. The Reduced Level (RL) of L is 150.000 m. The direction of the traverse is from L to N. The readings on levelling staff using the same levelling instrument kept at Stations S1 and S2 during the traversing are shown in the figure.

Diagram for Civil Engineering question 41

Column 1	Column 2
(I) Sum of Back Sights	(P) 3.300 m
(II) Sum of Fore Sights	(Q) 2.500 m
(III) RL of Point N	(R) 150.300 m
	(S) 3.000 m
	(T) 150.500 m

Matching the information given under Column 1 and Column 2, which one of the following options is CORRECT?

Your answerChoose one option.

(I) – (P) ; (II) – (S) ; (III) – (R)

(I) – (P) ; (II) – (Q) ; (III) – (R)

(I) – (S) ; (II) – (P) ; (III) – (T)

(I) – (S) ; (II) – (Q) ; (III) – (T)

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A road is divided into four sections having varying widths as shown in the figure. Section-2 (S2) represents a capacity constrained condition with respect to the traffic flow passing through Section-1 (S1). Section-3 (S3) and Section-4 (S4) do not face any such capacity constraint with respect to the flow. A flow-density relationship for unconstrained and constrained flow conditions is shown in the figure.

Diagram for Civil Engineering question 42

If Section-1 observes density D2, the option representing the correct state of density in Sections 2, 3 and 4 is:

Your answerChoose one option.

S2 – D4 ; S3 – D3 ; S4 – D2

S2 – D3 ; S3 – D2 ; S4 – D1

S2 – D3 ; S3 – D4 ; S4 – D2

S2 – D4 ; S3 – D3 ; S4 – D1

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The 2.4 ml of raw sewage is diluted to 240 ml. The Dissolved Oxygen (DO) of the diluted sample at the beginning of Biochemical Oxygen Demand (BOD) test was 8 mg/l and it was 6 mg/l after 5-day incubation at 20 °C.

The BOD₅ (in mg/l) of the raw sewage is

Your answerChoose one option.

200

100

250

150

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Locations P and Q are separated by a wide valley. The difference in levels of locations P and Q measured by a levelling instrument stationed near P is 3.0 m. The same instrument stationed near Q measures the difference in levels of locations P and Q as −1.0 m. Assume that the atmosphere refraction is same during the measurements. The true difference in levels (in m) of locations P and Q is

Your answerChoose one option.

1.0

1.5

2.0

4.0

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Types of flood routing and methods are given in the table below.

Column 1 — Type of Flood Routing: (P) Hydrologic routing (Q) Hydraulic routing (R) Reservoir routing (S) Channel routing

Column 2 — Method: (i) Muskingum method (ii) Modified Pul’s method (iii) Method of Characteristics

Option(s) giving the CORRECT match(es) between Column 1 and Column 2 is/are:

Your answerSelect all correct options. You can choose more than one.

(P) – (i) ; (Q) – (iii) ; (R) – (ii)

(Q) – (i) ; (R) – (iii) ; (S) – (ii)

(P) – (i) ; (R) – (ii) ; (S) – (i)

(P) – (ii) ; (Q) – (iii) ; (R) – (ii)

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The average sewage from a city is 90 million litres per day and the average 5-day Biochemical Oxygen Demand (BOD₅) is 300 mg/l. Average standard BOD₅ of the domestic sewage is 0.08 kg/day/person. The population equivalent of the city is

Your answerChoose one option.

337500

216000

270000

168750

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A shallow footing is subjected to a vertical load. Within the elastic limit of the underlying soil, the TRUE statement(s) is/are:

Your answerSelect all correct options. You can choose more than one.

Vertical displacement below a rigid shallow footing is uniform in clay as well as sand.

Vertical contact pressure below a rigid shallow footing is uniform in clay as well as sand.

Vertical displacement below a flexible shallow footing is uniform in clay as well as sand.

Vertical contact pressure below a flexible shallow footing is uniform in clay as well as sand.

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Select ALL CORRECT option(s) which can be considered to check whether the flexural stresses in a prestressed concrete beam are within the allowable stresses at the transfer and the service stages.

Your answerSelect all correct options. You can choose more than one.

Limiting zone for prestressing

Magnel’s graph

Hoyer effect

Load balancing method

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Which of the following statements is/are TRUE with respect to the type of stresses to be considered for the design of rigid pavements?

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Warping stress due to temperature differential between the top and bottom of the pavement slab as a result of daily variation in temperature

Frictional stress due to the overall increase or decrease in temperature of the pavement slab as a result of seasonal variation in temperature

Critical stress obtained as the maximum of the wheel load stress, the warping stress, and the frictional stress

Critical stress obtained as the sum of wheel load stresses at edge, interior, and corner of the pavement slab

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GATE CE topic:infrastructure PYQs

Question 41

Question 41

Question 42

Question 42

Question 43

Question 43

Question 44

Question 44

Question 45

Question 45