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Civil Engineering Gate 2020 Set-2 Questions with Answer

Ques 14 GATE 2020 SET-2

The following partial differential equation is defined for

. The set of auxiliary conditions necessary to solve the equation uniquely, is

A

three initial conditions

B

three boundary conditions

C

two initial conditions and one boundary condition

D

one initial condition and two boundary conditions


(d) is the correct answer.

Ques 15 GATE 2020 SET-2

The ratio of the plastic moment capacity of a beam section to its yield moment capacity is termed as

A

aspect ratio

B

load factor

C

shape factor

D

slenderness ratio


(c) is the correct answer.

Ques 16 GATE 2020 SET-2

The state of stress represented by Mohr's circle shown in the figure is

A

uniaxial tension

B

biaxial tension of equal magnitude

C

hydrostatic stress

D

pure shear


(d) is the correct answer.

Ques 17 GATE 2020 SET-2

A weightless cantilever beam of span L is loaded as shown in the figure.

For the entire span of the beam, the material properties are identical and the cross section is rectangular with constant width. From the flexure-critical perspective, the most economical longitudinal profile of the beam to carry the given loads amongst the options given below, is

A

B

C

D


(c) is the correct answer.

Ques 18 GATE 2020 SET-2

As per IS 456:2000, the pH value of water for concrete mix shall NOT be less than

A

4.5

B

5.0

C

5.5

D

6.0


(d) is the correct answer.

Ques 19 GATE 2020 SET-2

The traffic starts discharging from an approach at an intersection with the signal turning green. The constant headway considered from the fourth or fifth headway position is referred to as

A

discharge headway

B

effective headway

C

intersection headway

D

saturation headway


(d) is the correct answer.

Ques 20 GATE 2020 SET-2

Soil deposit formed due to transportation by wind is termed as

A

aeolian deposit

B

alluvial deposit

C

estuarine deposit

D

lacustrine deposit


(a) is the correct answer.

Ques 21 GATE 2020 SET-2

A sample of 500 g dry sand, when poured into a 2 litre capacity cylinder which is partially filled with water, displaces 188 cm3 of water. The density of water is 1 g/cm3. The specific gravity of the sand is

A

2.72

B

2.66

C

2.55

D

2.52


(b) is the correct answer.

Ques 22 GATE 2020 SET-2

Muskingum method is used in

A

hydrologic reservoir routing

B

hydrologic channel routing

C

hydraulic channel routing

D

hydraulic reservoir routing


(b) is the correct answer.

Ques 23 GATE 2020 SET-2

Superpassage is a canal cross-drainage structure in which

A

natural stream water flows with free surface below a canal

B

natural stream water flows under pressure below a canal

C

canal water flows with free surface below a natural stream

D

canal water flows under pressure below a natural stream


(c) is the correct answer.

Ques 24 GATE 2020 SET-2

A triangular direct runoff hydrograph due to a storm has a time base of 90 hours. The peak flow of 60 m3/s occurs at 20 hours from the start of the storm. The area of catchment is 300 km2. The rainfall excess of the storm (in cm), is

A

2.00

B

3.24

C

5.40

D

6.48


(b) is the correct answer.

Ques 25 GATE 2020 SET-2

The velocity components in the x and y directions for an incompressible flow are given as u = (-5 + 6x) and v = -(9 + 6y), respectively. The equation of the streamline is

A

(-5 + 6x) - (9 + 6y) = constant

B

(-5 + 6x) / (9 + 6y) = constant

C

(-5 + 6x)(9 + 6y) = constant

D

(9 + 6y) / (-5 + 6x) = constant


(c) is the correct answer.

Ques 26 GATE 2020 SET-2

The relationship between oxygen consumption and equivalent biodegradable organic removal (i.e., BOD) in a closed container with respect to time is shown in the figure.

Assume that the rate of oxygen consumption is directly proportional to the amount of degradable organic matter and is expressed as dLt/dt = -kLt, where Lt (in mg/litre) is the oxygen equivalent of the organics remaining at time t and k (in d-1) is the degradation rate constant. L0 is the oxygen equivalent of organic matter at time, t = 0. In the above context, the correct expression is

A

BOD5 = L5

B

BODt = L0 - Lt

C

L0 = Lte-kt

D

Lt = L0(1 - e-kt)


(b) is the correct answer.

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