GATE Civil Engineering Online Test, GATE CE Online Test 2021
GATE Civil Engineering Online Test Series 1, GATE CE Test
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GATE Civil Engineering Online Test Series 1. GATE 2021 CE Online Test, GATE Mock Test Exam 2021. GATE Civil Engineering Full online mock test paper is free for all students. Take GATE 2021 Exams Online Test, GATE 2021 Quiz. GATE 2021 CE Series 1 online Test 2021 in English, Take GATE 2021 Mock Test in English from below . You may also find other Subjects GATE Online Test in this page. Here we provide Graduate Aptitude Test in Engineering Question and Answers 2021. This GATE CE Online test Series 1 is very helpful for exam preparation. The GATE Civil Engineering Mock Test 2021 is now available for all candidates, who will be appearing in the national level engineering exams 2021. Now take GATE Civil Engineering Online Test Series 1 by Click on Below “Start Quiz Button”
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Question 1 of 25
1. Question
Tickets numbered from 1 to 20 are mixed up together and then a ticket is drawn at random. What is the probability that the drawn ticket has a number which is a multiple of 3 or 7?
Correct
Favourable cases = 3, 6, 9, 12, 15, 18, 7, 14 = 8 cases
Required Probability = 8/20 = 2/5Incorrect
Favourable cases = 3, 6, 9, 12, 15, 18, 7, 14 = 8 cases
Required Probability = 8/20 = 2/5 
Question 2 of 25
2. Question
In a zoo, there are 42 animals in one sector, 34 animals in the second sector and 20 animals in the third sector. Out of these, 24 graze in sector one and also in sector two, 10 graze in both sector two and sector three and 12 graze in both sector one and sector three. These figures also include four animals who graze in all the three sectors. If all the animals are now transported to another zoo, find the total number of animals transported.
Correct
Let I, II, III be the sets of animals grazing in 1^{st}, 2^{nd} and 3^{rd} sectors of zoo respectively.
Total number of animals = 10 + 20 + 4 + 8 + 4 + 6 + 2 = 54Incorrect
Let I, II, III be the sets of animals grazing in 1^{st}, 2^{nd} and 3^{rd} sectors of zoo respectively.
Total number of animals = 10 + 20 + 4 + 8 + 4 + 6 + 2 = 54 
Question 3 of 25
3. Question
If x cos y + y cos x = π and initial value of x and y is equal to 0, then y’ (0) =
Correct
x cosy + y cosx = π
Differentiating both side with respect to x
cosy + x (siny) dy/dx + cosx dy/dx – y sinx = 0
dy/dx = (y sinx cosy)/(cosx – x siny)
Putting here x= 0 and y = 0
dy/dx = (1)/1 = 1Incorrect
x cosy + y cosx = π
Differentiating both side with respect to x
cosy + x (siny) dy/dx + cosx dy/dx – y sinx = 0
dy/dx = (y sinx cosy)/(cosx – x siny)
Putting here x= 0 and y = 0
dy/dx = (1)/1 = 1 
Question 4 of 25
4. Question
If f(x) = 3x – 5 and f(g(x)) = 2x, then find the value of g(x).
Correct
Given that f(x) = 3x – 5 and f (g(x)) = 2(x)
∴ 3. G(x) – 5 = 2x
∴ g(x) = (2x + 5)/3.Incorrect
Given that f(x) = 3x – 5 and f (g(x)) = 2(x)
∴ 3. G(x) – 5 = 2x
∴ g(x) = (2x + 5)/3. 
Question 5 of 25
5. Question
If x + y = K is normal to y^{2} = 12x, then K is
Correct
We know that x + y = K (slope = – 1) is normal to the given curve, it means it is perpendicular to the tangent at the point (x, y). Hence the slope of the tangent must be 1.
y = mx+c is a tangent to y^2 = 4ax, iff. c=a/m.Putting a = 3, m =1, we get c = 3.
Tangent is y=x+3.
Solving the equations of parabola and tangent, we get pts (3,6) and(3,6)
This means that k= – 3 or k = 9
Incorrect
We know that x + y = K (slope = – 1) is normal to the given curve, it means it is perpendicular to the tangent at the point (x, y). Hence the slope of the tangent must be 1.
y = mx+c is a tangent to y^2 = 4ax, iff. c=a/m.Putting a = 3, m =1, we get c = 3.
Tangent is y=x+3.
Solving the equations of parabola and tangent, we get pts (3,6) and(3,6)
This means that k= – 3 or k = 9

Question 6 of 25
6. Question
The smallest interval [a, b], such that dx ∈ [a, b] is given by
Correct
Incorrect

Question 7 of 25
7. Question
Choose the odd one out.
Correct
Correct Answer : Map study
Incorrect
Correct Answer : Map study

Question 8 of 25
8. Question
Match List I with List II and select the correct answer using the codes given below the lists:
List I List II A. Camber 1. Subsurface drainage B. Joints 2. Surface drains C. Tack coat 3. Transverse slope D. Sand drains 4. Bituminous roads 5. Concrete roads Correct
Correct Answer : A – 3, B – 5, C – 4, D – 1
Incorrect
Correct Answer : A – 3, B – 5, C – 4, D – 1

Question 9 of 25
9. Question
Which one of the following pairs in not correctly matched?
Correct
Correct Answer : Check valve – To check water flow in all directions
Incorrect
Correct Answer : Check valve – To check water flow in all directions

Question 10 of 25
10. Question
The atmosphere extends upto a height of 10,000 km. It is divided into the following four thermal layers:
1. Mesosphere 2. Stratosphere 3. Thermosphere 4. Troposphere
The correct sequence of these layers starting from the surface of the earth upwards isCorrect
Correct Answer : 4, 2, 1, 3
Incorrect
Correct Answer : 4, 2, 1, 3

Question 11 of 25
11. Question
Pick up the correct statement:
Correct
Correct Answer : Confined aquifers are also known as flowing wells.
Incorrect
Correct Answer : Confined aquifers are also known as flowing wells.

Question 12 of 25
12. Question
Pick up the correct statement from the following.
Correct
Correct Answer : The water supply pipes carry pure water free from solid particles.
Incorrect
Correct Answer : The water supply pipes carry pure water free from solid particles.

Question 13 of 25
13. Question
In Chezy’s formula, V = C √rs is used for calculating the velocity of flow in circular sewer running full. The value of hydraulic mean radius may be taken as
Correct
Correct Answer : D/4
Incorrect
Correct Answer : D/4

Question 14 of 25
14. Question
In New mark’s influence chart for stress distribution, there are ten concentric circles and ten radial lines. The influence factor of the chart is:
Correct
Incorrect

Question 15 of 25
15. Question
The consistency index of a soil is defined as the ratio of:
Correct
Correct Answer : liquid limit minus the natural water content to the plasticity index of the soil
Incorrect
Correct Answer : liquid limit minus the natural water content to the plasticity index of the soil

Question 16 of 25
16. Question
Which of the following conditions must be obeyed by the topmost flow line through an earthen dam section?
1. Having atmospheric pressure
2. Normal to the downstream slope
3. Normal to the upstream slope
4. Tangent to the slope at the exit pointCorrect
Correct Answer : 2 and 4
Incorrect
Correct Answer : 2 and 4

Question 17 of 25
17. Question
Pick up the correct statement from the following.
Correct
Correct Answer : All the above
Incorrect
Correct Answer : All the above

Question 18 of 25
18. Question
The run off a drainage basin is
Correct
Correct Answer : Precipitation – ground water accretion – initial recharge
Incorrect
Correct Answer : Precipitation – ground water accretion – initial recharge

Question 19 of 25
19. Question
To estimate the magnitude of a flood with a return period of T years, Gumbel`s distribution method requires the following data pertaining to annual food series:
(i) mean value
(ii) standard deviation
(iii) length of record
(iv) coefficient of skewCorrect
Correct Answer : (i), (ii) and (iii)
Incorrect
Correct Answer : (i), (ii) and (iii)

Question 20 of 25
20. Question
The ordinate of the Instantaneous Unit Hydrograph (IUH) of a catchment at any time t, is
Correct
Correct Answer : the slope of the S curve with effective rainfall intensity of 1 cm/hr
Incorrect
Correct Answer : the slope of the S curve with effective rainfall intensity of 1 cm/hr

Question 21 of 25
21. Question
Which of the following will prove to be the most economical section of a circular channel for the maximum discharge?
Correct
Correct Answer : All the above
Incorrect
Correct Answer : All the above

Question 22 of 25
22. Question
In a standing wave flume, the depth of flow in the throat region
Correct
Correct Answer : should be equal to the critical depth
Incorrect
Correct Answer : should be equal to the critical depth

Question 23 of 25
23. Question
The relationship:
dp/dx = dr/dy is valid forCorrect
Correct Answer : uniform flow
Incorrect
Correct Answer : uniform flow

Question 24 of 25
24. Question
Match List I with List II and select the correct answer using the codes given below the lists:
List I List II A. Rotational flow 1. A fluid motion in which stream lines are concentric circles B. Vortex flow 2. The fluid particles moving in concentric circles may not rotate about their mass centre C. Free vortex 3. The fluid particles moving in concentric circles may rotate D. Forced vortex 4. Flow near a curved solid boundary Correct
Correct Answer : A – 4, B – 1, C – 2, D – 3
Incorrect
Correct Answer : A – 4, B – 1, C – 2, D – 3

Question 25 of 25
25. Question
In steady laminar flow of a liquid through a circular pipe of internal diameter D, carrying a constant discharge, the hydraulic gradient is inversely proportional to:
Correct
Correct Answer : D^{2}
Incorrect
Correct Answer : D^{2}