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Civil Engineering (CE) Exam  >  Civil Engineering (CE) Tests  >  ISRO Draughtsman Civil Mock Test Series 2024  >  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 Series 2024 - ISRO Draughtsman Civil Mock Test - 3

ISRO Draughtsman Civil Mock Test - 3 for Civil Engineering (CE) 2024 is part of ISRO Draughtsman Civil Mock Test Series 2024 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) 2024 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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Cohesion less soil is -

Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 1
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 2
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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 2

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

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ISRO Draughtsman Civil Mock Test - 3 - Question 3
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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 3

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 4
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Bulking of sand is :
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 4
The volume increase of fine aggregate due to moisture content is known as bulking. Fine sand bulks more than coarse sand—extremely fine sand, particularly the manufactured fine aggregate bulks, as much as about 40%.
ISRO Draughtsman Civil Mock Test - 3 - Question 5
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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 5

ISRO Draughtsman Civil Mock Test - 3 - Question 6
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A mild steel wire is 10 mm in diameter and 1 mm long. If a wire is subjected to an axial tensile load of 10 kN, find the extension in the rod. (Take E = 200 x 109)
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 6
(Elongation =PL/AE)

(=100×100×1/A×200×109(m))

(A=π/4(d2)=π/4×(10×10−3)2m2)

(=7.85×10−5m2)

( Elongation =10×1000×1/7.85×10−5×200×109)

(=6.369×10−4m)(=0.64nm)

Hence the option C is correct.

ISRO Draughtsman Civil Mock Test - 3 - Question 7
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The limit to Poisson’s ratio is-
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 7
Limiting values of Poisson’s ratio are 0 and 0.5

Hence the option C is correct.

ISRO Draughtsman Civil Mock Test - 3 - Question 8
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The type of weld used to connect two plates at a lap joint is called-
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 8
Lap welding joints are often used to combine two pieces with differing thicknesses. Also considered a fillet type, the weld can be made on one or both sides.

Hence the option D is correct.

ISRO Draughtsman Civil Mock Test - 3 - Question 9
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Re-oxygenation curve of a polluted stream-
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 9
To counterbalance the consumption of D.O. due to de-oxygenation atmosphere supplies oxygen to the water. This is known as re-Oxygenation. It Increases with the time of flow from the point of pollution.

Hence the correct answer is option B.

ISRO Draughtsman Civil Mock Test - 3 - Question 10
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The radius of a rotary roadway is:
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 10
Rotaries are suitable when the traffic entering from three or more approaches are relatively equal. A total volume of about 3000 vehicles per hour can be considered the upper limiting case, and a volume of 500 vehicles per hour is the lower limit. Rotaries are suitable when there are more approaches and no separate lanes are available for right-turn traffic, thus making intersection geometry complex. The traffic operations at a rotary are three; diverging, merging, and weaving.

The radius of a rotary roadway is:

Hence the correct answer is option d.

ISRO Draughtsman Civil Mock Test - 3 - Question 11
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If H is the total height of the building, then under transient wind load, the lateral sway at the top should not exceed -
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 11
As per IS 456: 2000, clause, 20.5

For RCC structures, under transient wind load, the lateral sway at the top shall not exceed 0.002 times the height of the building.

Hence correct answer is option A.

ISRO Draughtsman Civil Mock Test - 3 - Question 12
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Pick up the incorrect statement:
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 12

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 13
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Compaction generally increases the
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 13
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 14
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Continuity equation is based on the principle of conservation of
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 14
Continuity principle, or continuity equation, Principle of fluid mechanics. Stated simply, what flows into a defined volume in a defined time, minus what flows out of that volume in that time, must accumulate in that volume. The principle is a consequence of the law of conservation of mass.

Hence the correct answer is option B.

ISRO Draughtsman Civil Mock Test - 3 - Question 15
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Rapid setting cement contains a relatively higher proportion of
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 15
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 16
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Which of the following is an obstacle in chaining but not in ranging?
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 16
Ranging is the process performed by the sighting, but in chaining, chain has to be on the ground for measurement, which is not possible in the case of a river.
ISRO Draughtsman Civil Mock Test - 3 - Question 17
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For the design of cement concrete pavement, for corner loading, IRC recommends the use of-
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 17
For the design of cement concrete pavement, for corner loading, IRC recommends using Picker's formula.
ISRO Draughtsman Civil Mock Test - 3 - Question 18
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Radius of gyration is-
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 18
Radius of gyration is the Square root of the moment of inertia divided by area.
ISRO Draughtsman Civil Mock Test - 3 - Question 19
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The best-suited rolled steel section for a tension member is
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 19

The best-suited rolled steel section for a tension member is T-section.

ISRO Draughtsman Civil Mock Test - 3 - Question 20
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A circular shaft of diameter D is subjected to a torque T. The maximum shear stress of the shaft will be-
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 20

tmax is inversely proportional to (D3)

ISRO Draughtsman Civil Mock Test - 3 - Question 21
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Undisturbed samples are obtained by :
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 21

Soil samples are classified as disturbed and undisturbed samples.

Undisturbed samples: The soil samples in which original soil structure and mineral properties have not undergone any change are called undisturbed samples.

It is important in the identification of soil properties such as shear strength, water content, soil structure, consolidation properties, etc.

Disturbed sample: The soil samples in which original soil structure and mineral properties are destroyed during sampling operation are called disturbed samples.

They are used to study soil grain properties, in CBR test for highway construction, etc.

The extent of disturbance depends on cutting edge and inside wall friction of soil sampler.

The sampling tubes are of two types:-

a) Thin-walled sampler: These are used to obtain undisturbed samples. The sampler tube is pushed into the soil without any twisting.

b) Thick-walled sampler: These are used to obtain disturbed but representative samples. The sampler tube is twisted and pushed into the soil.

Important Points:

Direct excavations: It is a method of soil exploration. This method is generally used in small works and produces disturbed samples.

Augers- It is a boring method in which the boring is carried by an auger that is held vertically and pressed down shearing the soil around the auger.

ISRO Draughtsman Civil Mock Test - 3 - Question 22
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Crushing strength of good building stone should be more than:
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 22
Crushing strength or compressive strength of a stone is the load per unit area where the stone starts cracking. It should be greater than 1000 kg/cm2 to ensure sufficient strength for use in construction.
ISRO Draughtsman Civil Mock Test - 3 - Question 23
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Sum of the specific yield and specific retention is-
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 23
The fraction of water held back in the aquifer is known as specific retention. Thus it can be said that porosity is the sum of specific yield and specific retention.

Hence, the correct option is (A).

ISRO Draughtsman Civil Mock Test - 3 - Question 24
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Side face reinforcement is provided in a beam when the depth of web exceeds-
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 24
Where the depth of the web in a beam exceeds 750 mm, side reinforcement shall be provided along with the two faces.

To control cracking in beams with a total depth ˃ 750mm, sidebars are provided in the side faces of the beam. The distribution of these bars is over a distance of two-third of the beam's overall depth measured from its tension face.

Hence, the correct option is (D)

ISRO Draughtsman Civil Mock Test - 3 - Question 25
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If B is the width of the beam and D is the overall depth d is the effective depth then, Maximum tension reinforcement in concrete structure is given by :
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 25
If B is the width of the beam and D is the overall depth and d is the effective depth then, Maximum tension reinforcement in concrete structure is given by 0.4 BD

Hence, the correct option is (A)

ISRO Draughtsman Civil Mock Test - 3 - Question 26
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According to Le Chatelier Method for testing soundness of cement the unaerated ordinary rapid hardening and low heat Portland cement should not have an expansion of more than :
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 26
The value of soundness of cement obtained for Ordinary Portland Cement (OPC), Low heat cement, high alumina cement and rapid hardening cement must not exceed 10mm. The Le-chatlier's Method helps us to determine the lime present in the cement in excess.

Hence, the correct option is (C)

ISRO Draughtsman Civil Mock Test - 3 - Question 27
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IS code for standard penetration test in the soil is:
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 27
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 28
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Settlement of soil under compressive force due to the expulsion of water from pores is known as -
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 28
Settlement of soil under compressive force due to the expulsion of water from pores is known as primary consolidation.
ISRO Draughtsman Civil Mock Test - 3 - Question 29
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A flat plate is welded to a gusset plate by a fillet weld of size 10 mm. The angle between the fusion faces and the effective length of the weld is 85° and 300 mm respectively. If the axial factored load acting on the plate is 250 kN, then the average shear stress produced in the weld is
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 29

Factored load-carrying capacity of the weld,

P = permissible shear stress in the weld(fy) × effective area of the weld the effective area of the weld = effective length of the weld(Leff)× throat thickness(Tt)

Therefore, P = fy × Leff × Tt

since, the angle between the fusion faces is 85°, Tt = 0.7 × size of the weld

ISRO Draughtsman Civil Mock Test - 3 - Question 30
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Aggregates affecting the durability of concrete most are:
Detailed Solution for ISRO Draughtsman Civil Mock Test - 3 - Question 30
The aggregate is said to be flaky when its least dimension is less than 3/5th (or 60%) of its mean dimension. Flaky aggregates are crushed easily and hence unsuitable for concrete.
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