Civil Engineering Gate Yearwise 

Civil Engineering GATE 2023 Set-1 Questions with Answer

Ques 1 Construction Materials

Creep of concrete under compression is defined as the _______.

A

increase in the magnitude of strain under constant stress

B

increase in the magnitude of stress under constant strain

C

decrease in the magnitude of strain under constant stress

D

decrease in the magnitude of stress under constant strain



Ques 2 Construction Materials

In cement concrete mix design, with the increase in water-cement ratio, which one of the following statements is TRUE?

A

Compressive strength decreases but workability increases

B

Compressive strength increases but workability decreases

C

Both compressive strength and workability decrease

D

Both compressive strength and workability increase



Ques 3 Engineering Mathematics

If M is an arbitrary real n x n matrix, then which of the following matrices will have non-negative eigenvalues?

A

M2

B

MMT

C

MTM

D

(MT)2



Ques 4 Engineering Mathematics

The following function is defined over the interval [-L, L]:
f(x) = px4 + qx5
. If it is expressed as a Fourier series,

, which options amongst the following are true?

A

an, n = 1, 2, · · ·, ∞ depend on p

B

an, n = 1, 2, · · ·, ∞ depend on q

C

bn, n = 1, 2, · · ·, ∞ depend on p

D

bn, n = 1, 2, · · ·, ∞ depend on q



Ques 5 Engineering Mathematics

The probabilities of occurrences of two independent events A and B are 0.5 and 0.8, respectively. What is the probability of occurrence of at least A or B (rounded off to one decimal place)?


0.9 is the correct answer.


Ques 6 Engineering Mathematics

In the differential equation dy⁄dx + αxy = 0, a is a positive constant. If y = 1.0 at x = 0.0, and y = 0.8 at x = 1.0, the value of a is _______. (rounded off to three decimal places)


0.446 is the correct answer.


Ques 7 Engineering Mathematics

For the matrix

which of the following statements is/are TRUE?

A

The eigenvalues of [𝐴]T are same as the eigenvalues of [𝐴]

B

The eigenvalues of [𝐴]-1 are the reciprocals of the eigenvalues of [𝐴]

C

The eigenvectors of [𝐴]T are same as the eigenvectors of [𝐴]

D

The eigenvectors of [𝐴]-1 are same as the eigenvectors of [𝐴]



Ques 8 Engineering Mathematics

For the integral

which of the following statements is TRUE?

A

I = 0

B

I = 2

C

I = -2

D

The integral does not converge



Ques 9 Environmental Engineering

Which one of the following statements is TRUE for Greenhouse Gas (GHG) in the atmosphere?

A

GHG absorbs the incoming short wavelength solar radiation to the earth surface, and allows the long wavelength radiation coming from the earth surface to pass through

B

GHG allows the incoming long wavelength solar radiation to pass through to the earth surface, and absorbs the short wavelength radiation coming from the earth surface

C

GHG allows the incoming long wavelength solar radiation to pass through to the earth surface, and allows the short wavelength radiation coming from the earth surface to pass through

D

GHG allows the incoming short wavelength solar radiation to pass through to the earth surface, and absorbs the long wavelength radiation coming from the earth surface



Ques 10 Environmental Engineering

Identify the waterborne diseases caused by viral pathogens:

A

Acute anterior poliomyelitis

B

Cholera

C

Infectious hepatitis

D

Typhoid fever



Ques 11 Environmental Engineering

Which of the following statements is/are TRUE for the Refuse-Derived Fuel (RDF) in the context of Municipal Solid Waste (MSW) management?

A

Higher Heating Value (HHV) of the unprocessed MSW is higher than the HHV of RDF processed from the same MSW

B

RDF can be made in the powdered form

C

Inorganic fraction of MSW is mostly converted to RDF

D

RDF cannot be used in conjunction with oil



Ques 12 Environmental Engineering

In the following table, identify the correct set of associations between the entries in Column-1 and Column-2.

A

P-II, Q-I, S-III

B

Q-III, R-II, S-IV

C

P-IV, R-I, S-II

D

P-III, Q-I, R-IV



Ques 13 Environmental Engineering

Which of the following statements is/are TRUE in relation to the Maximum Mixing Depth (or Height) '${D_{max}}^{\prime}$ in the atmosphere?

(A) $D_{max}$ is always equal to the height of the layer of unstable air
(B) Ventilation coefficient depends on $D_{max}$
(C) A smaller $D_{max}$ will have a smaller air pollution potential if other meteorological conditions remain same
(D) Vertical dispersion of pollutants occurs up to $D_{max}$

A

$D_{max}$ is always equal to the height of the layer of unstable air

B

Ventilation coefficient depends on $D_{max}$

C

A smaller $D_{max}$ will have a smaller air pollution potential if other meteorological conditions remain same

D

Vertical dispersion of pollutants occurs up to $D_{max}$



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