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Civil Engineering (CE) Exam  >  Civil Engineering (CE) Tests  >  ISRO Draughtsman Civil Mock Test - 3 - Civil Engineering (CE) MCQ

ISRO Draughtsman Civil Mock Test - 3 - Civil Engineering (CE) MCQ


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30 Questions MCQ Test - ISRO Draughtsman Civil Mock Test - 3

ISRO Draughtsman Civil Mock Test - 3 for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The ISRO Draughtsman Civil Mock Test - 3 questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The ISRO Draughtsman Civil Mock Test - 3 MCQs are made for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for ISRO Draughtsman Civil Mock Test - 3 below.
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ISRO Draughtsman Civil Mock Test - 3 - Question 1
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The maximum n permissible shear stress given in BIS 456-1978 is based on

Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 1
The maximum n permissible shear stress given in BIS 456-1978 is based on Diagonal compression failure.
ISRO Draughtsman Civil Mock Test - 3 - Question 2
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Acidity in water is caused due to

Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 2
Carbon dioxide is the most common cause of acidity in water. Photosynthesis, respiration, and decomposition all contribute to pH fluctuations due to their influences on CO2 levels. This increases H2CO3, which decreases pH. The effect is becoming more evident in oceanic pH studies over time.
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ISRO Draughtsman Civil Mock Test - 3 - Question 3
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Which type of hall can be generally used for moderate discharge of 40-60 cumes and low fall heights of 1m to 1.5 m?

Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 3
Option (c) is the correct Ogee fall that has convex and concave curves. Due to smooth transition, the kinetic energy of the flow is not at all dissipated. This causes erosion of downstream beds and banks. It is not used these days. Well (Cylindrical or siphon well) fall is necessary in the case of falls greater than 1.8m and for discharges greater than 0.29m3/s. Thus it is used for larger drop and smaller discharges. Simple vertical drop type and Sarda type falls are used for small discharges which vary over a wide range. They are suitable for discharges upto 15 cumecs and drops upto 1.5m Straight Glacis falls are designed such that hydraulic jump occurs on the glacis, causing sufficient energy dissipation. They can be adopted suitably for discharges upto 60 comecs and drop upto 1.5m and can be even flamed. Baffle fall (English fall) may be used for all discharges when the drop is more than 1.5m.
ISRO Draughtsman Civil Mock Test - 3 - Question 4
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The resistance of an aggregate to impact is known as
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 4
The property of a material to resist impact is known as toughness. The aggregate impact value is a measure of resistance to sudden impact or shock, which may differ from its resistance to gradually applied compressive load.
ISRO Draughtsman Civil Mock Test - 3 - Question 5
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According to the Dickens formula, the flood discharge Q in cumes is given by
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 5
According to the Dickens formula, the flood discharge Q in cumes is given by CA3/4

Where C = Dickens coefficient

A = Area of the basin in sq. km.

ISRO Draughtsman Civil Mock Test - 3 - Question 6
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In a beam, the diagonal tension is inclined at an angle of –– with horizontal.
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 6
In a beam, the diagonal tension is inclined at an angle of (450) with horizontal.

Hence the correct answer is option B.

ISRO Draughtsman Civil Mock Test - 3 - Question 7
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Cohesion less soil is -
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 7
Cohesionless soil – Lacking cohesion among particles such as in the case of sand a cohesion less soil.

Any free–running type of soil, such as sand or gravel, whose strength depends on the friction between particles, is called Cohesion less soil—also called frictional.

Cohesive soil– It is hard to break up when dry and exhibits significant cohesion when submerged. Cohesive soils include clayey silt, sandy clay silty clay, and organic clay, “Dry soil” means soil that does not exhibit visible sign of moisture content.

ISRO Draughtsman Civil Mock Test - 3 - Question 8
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Calculate the volume (cubic meter) of earthwork for an embankment of length 30 m and width 4 m. The mean depth of the embankment is 4 m and side slope is 2: 1. Using mid-sectional area method.
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 8

Given,
Length of embankment(L) = 30 m
width of embankment(B) = 4 m
mean depth of embankment(dm) = 4 m
side slope is 2:1
Area of mid-section = Area of rectangular
portion + area of two triangular portion

= 1440 m3

ISRO Draughtsman Civil Mock Test - 3 - Question 9
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Consider the following statements :

A simply-supported beamish subjected to a couple somewhere in the span. It would produce

1. A rectangular SF diagram

2. parabolic BM diagrams

3. both + ve and - ve BMs are maximum at the point of application of the couple.

Of these statements
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 9

ISRO Draughtsman Civil Mock Test - 3 - Question 10
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Find out the set among the four sets which is like the given set.
Given set is (63, 54, 45)
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 10

In the given set the difference between the consecutive terms is 9 i.e.
Based on same pattern out of given options:
A) (36, 45, 32) ⇒ 36 – 45 = -9 & 45 – 32 = 13
B) (29, 20, 11) ⇒ 29 – 20 = 9 & 20 – 11 = 9
C) (30, 21, 11) ⇒ 30 – 21 = 9 & 21 – 11 = 10
D) (28, 17, 8) ⇒ 28 – 17 = 11 & 17 – 8 = 9
Thus only (29, 20, 11) follows the same pattern as similar to given set.

ISRO Draughtsman Civil Mock Test - 3 - Question 11
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A sample of saturated clay has a porosity of 0.562. The void ratio of the clay is;
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 11

ISRO Draughtsman Civil Mock Test - 3 - Question 12
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Shrinkage in concrete can be reduced by using-
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 12
Shrinkage can be reduced by using the maximum practical amount of aggregate in the mixture. The lowest water-to-cement ratio is important to avoid this type of shrinkage.

Hence the option D is correct.

ISRO Draughtsman Civil Mock Test - 3 - Question 13
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The limit to Poisson’s ratio is-
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 13
Limiting values of Poisson’s ratio are 0 and 0.5

Hence the option C is correct.

ISRO Draughtsman Civil Mock Test - 3 - Question 14
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According to IS code, the flexural strength in (N/mm2) is given as:
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 14
Flexural strength of and modulus of elasticity is given as

Hence the correct answer is option B.

ISRO Draughtsman Civil Mock Test - 3 - Question 15
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Pick up the incorrect statement:
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 15

Float is the range within which the start or the finish time of activity may fluctuate without affecting project completion time. Floats cannot be negative.

Hence the correct answer is option A.

ISRO Draughtsman Civil Mock Test - 3 - Question 16
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Von-Karmon at a definite distance from the wall -
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 16
In 2D incompressible and steady flow, the pressure gradient in the direction of flow is zero

Hence the correct answer is option C.

ISRO Draughtsman Civil Mock Test - 3 - Question 17
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Compaction generally increases the
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 17
Compaction means pressing the soil particles close to each other by mechanical methods. Air during compaction is expelled from the void space in the soil mass, and then the mass density is increased. It is also useful in reducing the compressibility and permeability of the soil.

Hence the correct answer is option D.

ISRO Draughtsman Civil Mock Test - 3 - Question 18
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Two blocks A and B, each of mass m, are placed on a smooth horizontal surface. Two horizontal forces F and 2F, are applied on blocks A and B, respectively, as shown in Figure. Block a does not slide on block B. Then the normal reaction acting between the two blocks in (assume no friction between the blocks).
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 18
Consider Both masses as a system,

Total force on system FT​ = 2F − F = F (Left side)

Mass of system M = 2m

Acceleration of two mass system is a = f/2m towards left free body diagram is

N cos 60 − F = ma

N = 3F

Normal reaction acting between two blocks = N = 3F

Hence, option (D) is the correct answer.

ISRO Draughtsman Civil Mock Test - 3 - Question 19
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Rapid setting cement contains a relatively higher proportion of
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 19
Large proportion of lime is the distinguishing feature of rapid hardening cement. Rapid hardening cement is burnt at a higher temperature than that of the OPC under more controlled conditions.

Hence the correct answer is option A.

ISRO Draughtsman Civil Mock Test - 3 - Question 20
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For the flow, through the soils, to be laminar, the Reynolds number shall be-
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 20
For the flow of water through pipes, the flow is laminar when the Reynolds number is less than 2000. For flow through soils, it has been found that the flow is laminar if the Reynolds number is less than unity.
ISRO Draughtsman Civil Mock Test - 3 - Question 21
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Radius of gyration is-
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 21
Radius of gyration is the Square root of the moment of inertia divided by area.
ISRO Draughtsman Civil Mock Test - 3 - Question 22
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The detention period for oxidation bonds is usually kept as :
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 22
between 10 to 15 days

Oxidation ponds have a long detention period between 10 to 15 days. Explanation: The BOD removal efficiency of an oxidation pond lies between 80% and 90%, so the maximum BOD removal efficiency is 90%.

ISRO Draughtsman Civil Mock Test - 3 - Question 23
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In leveling operation :
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 23

a) the first sight taken on changing point is foresight, not back sight.

b) the second sight on any changing point is back sight, not foresight.

c) line commences with a backsight and ends with a foresight.

Before shifting the instrument, the last sight is foresight which is taken on change point. After shifting the instrument, the first sight taken is taken on the same change point, i.e., back sight.

ISRO Draughtsman Civil Mock Test - 3 - Question 24
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The Muller-Breslau principal for influence line is applicable for-
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 24
The principle states that the influence lines of action (force or moment) assumes the scaled form of the deflection displacement. OR, This principle states that "ordinate of ILD for a reactive force is given by ordinate of the elastic curve if a unit deflection is applied in the direction of the reactive force."
ISRO Draughtsman Civil Mock Test - 3 - Question 25
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A manhole is generally provided at each:
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 25
A manhole is generally provided at each:

  • Bend

  • Junction

  • Change of gradient

ISRO Draughtsman Civil Mock Test - 3 - Question 26
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IS code for standard penetration test in the soil is:
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 26
IS 2131 (1981): Method for standard penetration test for soils

IS : 2131- 1981 4.2 The data obtained shall be prepared in a final form as a soil profile to show the nature and extent of the soil strata over the area under consideration.

Hence, the correct option is (C)

ISRO Draughtsman Civil Mock Test - 3 - Question 27
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The dressing of stone is done:
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 27

  • The process of giving a proper size, shape, and finish to the roughly broken stones as obtained from the quarry is known as “Dressing of stone.”

  • The extraction of suitable stones from their natural rock beds or layers is commonly called Quarrying of Stones.

  • Stones obtained from the quarries are very rough and irregular in shape and quite bulky in size and weight.

  • The dressing of stone is done immediately after quarrying

ISRO Draughtsman Civil Mock Test - 3 - Question 28
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Consider the following statements –

1. The size of a theodolite is defined by the diameter of the graduated circle of the lower plate.

2. The process of establishing intermediate points, on a given straight line whose ends are intervisible, is done with a theodolite is called lining in.

3. Removal of parallax may be achieved by refocusing the eyepiece.

4. An imaginary line passing through the optical center of the eyepiece in the telescope of a surveying instrument is called the line of collimation.

Which of the above statement are correct?
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 28
1. The size of the theodolite is defined by the diameter of the graduated circle of the lower plate.

2. The process of establishing intermediate points, on a given straight line whose ends are intervisible is done with a theodolite is called lining in.

3. Removal of parallax may be achieved by refocusing the eyepiece and the objective.

4. Line of collimation: It is an imaginary line passing through the intersection of the crosshairs at the diaphragm and the optical center of the object glass and its continuation.

5. Axis of Bubble tube: It is an imaginary line tangential to the longitudinal curve of the bubble tube at its midpoint.

6. Axis of a telescope: This axis is an imaginary passing through the optical center of the object-glass and the optical center of the eye-piece.

ISRO Draughtsman Civil Mock Test - 3 - Question 29
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Consider the following statement:

A) Sprinkler method of irrigation has a higher water application efficiency.

B) The duty of drip irrigation is very high due to losses are least in this irrigation system.

Which of the following is/are correct?
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 29
Sprinkler Irrigation

In this method of irrigation, water is delivered through a network of pipes and pumps.

Water is available in form of the spray.

It also reduces seepage losses and other losses.

Hence, the Sprinkler method of irrigation has a higher water application efficiency.

Drip Irrigation:

This method is also called Trickling irrigation.

In this method of irrigation water is directly applied to the root zone of the plant using the drip nozzle.

Evaporation and percolation losses are considerably reduced in this method.

Hence, the duty of drip irrigation is very high.

ISRO Draughtsman Civil Mock Test - 3 - Question 30
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The water meter, which is installed on individual house connection, on municipal supply is:
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 30
Water metering is the process of measuring water use. There are two common approaches to flow measurement

i) Displacement

ii) Velocity

Displacement meters: This type of water meter is most often used in residential and small commercial applications and homes. Displacement meters are commonly referred to as Positive Displacement, or "PD" meters.

PD meters are generally very accurate at the low-to-moderate flow rates typical of residential and small commercial users and commonly range in size from 5/8" to 2".

Velocity meters: A velocity-type meter measures the velocity of flow through a meter of a known internal capacity. The speed of the flow can then be converted into the volume of flow to determine the usage.

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