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ISRO Draughtsman Civil Mock Test - 9 - Civil Engineering (CE) MCQ


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30 Questions MCQ Test - ISRO Draughtsman Civil Mock Test - 9

ISRO Draughtsman Civil Mock Test - 9 for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The ISRO Draughtsman Civil Mock Test - 9 questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The ISRO Draughtsman Civil Mock Test - 9 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 - 9 below.
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ISRO Draughtsman Civil Mock Test - 9 - Question 1

Coarse soil generally

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 1
Coarse-grained soil is frequently identified based on the particle size or grain size. Particles with a diameter larger than 4.75 mm are termed gravel and particles with a diameter range between 4.75 mm to 75 microns are known as sand.
ISRO Draughtsman Civil Mock Test - 9 - Question 2

A RC column 4m long and 400mm in dia is reinforced by 8 bar of the 20mm dia, find the safe load, the column can carry, (σsc = 4N/mm2, σse = 130N/mm2)

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 2

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ISRO Draughtsman Civil Mock Test - 9 - Question 3

While estimating for plastering, usually no deduction is made for:

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 3
  • End of beams

  • Small opening upto 0.5 sq.m.

  • End of rafters

Hence the correct answer is option D.

ISRO Draughtsman Civil Mock Test - 9 - Question 4

A column is a compression member, the effective length of which exceeds

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 4

As per IS 456 : : 2000, clause 25.1.1

Column or strut is a compression member, the effective length of which exceeds three times the least lateral dimension.

ISRO Draughtsman Civil Mock Test - 9 - Question 5

A beam is defined as a structural member subjected to -

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 5
Beam is a flexure member of the structure. It is subjected to transverse loading such as vertical loads and gravity loads.
ISRO Draughtsman Civil Mock Test - 9 - Question 6

The commonly used lime in whitewashing is:

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 6
Fat lime is suitable for whitewashing and plastering.

Fat lime is also known as high calcium lime or pure lime or rich lime or white lime. It is popularly known as fat lime as it slakes vigorously, and its volume is increased to about 2 to 2.5 times that of quick lime. This lime is used for various purposes as whitewashing, plastering of walls, as lime mortar with sand for pointing in masonry work, as a lime mortar with turki for thick masonry walls, foundations, etc.

ISRO Draughtsman Civil Mock Test - 9 - Question 7

Crushing strength of good building stone should be more than -

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 7
Requirements of a Good Building Stone

A good building stone should possess several characteristics such as high strength (i.e., crushing strength >1000kg/cm2 ) (100 Mpa)), high durability, sufficient hardness (i.e., coefficient of hardness >14 ), high resistance of wear, good fire resistance specific gravity more than 2.7, crystalline structure, high impact value (i.e., toughness index >13 ), low water absorption (i.e., Percentage absorption after 24 hours less than 0.6 ), facility for carving and dressing, weather resistance and better appearance. Generally, stones from igneous and metamorphic rocks are heavier and more durable than stones from sedimentary rocks.

ISRO Draughtsman Civil Mock Test - 9 - Question 8

In the following question, select the related letters/number from the given alternatives.
GREAT : 25 : : NUMBER : ?

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 8

Here, GREAT is a five character word ⇒ 5 × 5 = 25
Therefore, NUMBER is a six character word ⇒ 6 × 6 = 36
Hence answer is 36.

ISRO Draughtsman Civil Mock Test - 9 - Question 9

The moment of inertia of a circular area of radius r with respect to diameter axis is

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 9

The moment of inertia of a circular area of radius r with respect to diameter axis is πr4 ÷ 4 where R is the radius of the circle.

ISRO Draughtsman Civil Mock Test - 9 - Question 10

The slenderness limit for simply supported or continuous beam to ensure lateral stability is:

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 10

As per IS 456:2000, clause 23.3, A simply supported or continuous beam shall be so proportioned that the clear distance between the lateral restraints does not exceed 60b or 250b2/d whichever is less, where d is the effective depth of the beam and b is the breadth of the compression face midway between the lateral restraints.

ISRO Draughtsman Civil Mock Test - 9 - Question 11

A rain hyetograph is:

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 11

A rain hyetograph is curve showing intensity of rainfall with time and curve showing mean depth with area is depth area duration.

ISRO Draughtsman Civil Mock Test - 9 - Question 12

If the maximum bending moment of a simply supported slab is M kg-cm, the effective depth of the slab is-

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 12
The effective depth of the slab

(=√M/100Q)

Hence the option D is correct.

ISRO Draughtsman Civil Mock Test - 9 - Question 13

When slenderness ratio in column lies between 32 to 120, it is known as-

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 13
The columns with their lengths varying from 8 times their diameter to 30 times their respective diameters or their slenderness ratio lying between 32 and 120 are classified under the medium column.

Hence the option C is correct.

ISRO Draughtsman Civil Mock Test - 9 - Question 14

A column is a compression member, the effective length of which exceeds three times its least lateral dimension. This is applicable to-

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 14
Column is a compression member, the effective length of which exceeds three times the least lateral dimension. Compression member whose length does not exceed three times their least lateral dimension is classified as a pedestal.

Hence the option A is correct.

ISRO Draughtsman Civil Mock Test - 9 - Question 15

The process involved in Chlorination before breakpoint chlorination are-

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 15
The processes involved in chlorination before Breakpoint chlorination

(i) Plain

(ii) Pre

(iii) Post

(iv) Double Chlorination

Hence the correct answer is option C.

ISRO Draughtsman Civil Mock Test - 9 - Question 16

The line drawn through the points of the same declination is called-

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 16
Iso = equal, Gonic = declination, thus isogonic lines represent lines obtained from joining points of equal declination.

Hence the correct answer is option C.

ISRO Draughtsman Civil Mock Test - 9 - Question 17

Thermal pollution can be controlled by

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 17
Water from condensers is stored in ponds where natural evaporation cools the water, which can be recirculated or discharged in the nearby water body.

Hence the correct answer is option D.

ISRO Draughtsman Civil Mock Test - 9 - Question 18

Given that the base period is 120 days and the duty of the canal is 1100 hectares per cumecs, the depth of water will be

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 18

Δ = 0.942 m = 94.2 cm

Hence the correct answer is option C.

ISRO Draughtsman Civil Mock Test - 9 - Question 19

The maximum spacing of vertical reinforcement in the RCC wall should not exceed

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 19
Maximum spacing of bars is 450mm or 3t, whichever lesser. The thickness of the wall in no case should be less than 100mm. If the thickness is greater than 200mm, double grid reinforcement is provided along with both the faces. Should not exceed 3 times the thickness of the wall.

Hence the correct answer is option C.

ISRO Draughtsman Civil Mock Test - 9 - Question 20

The ozonation in drinking water helps to remove

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 20
Because of its excellent disinfection and oxidation qualities, ozone is widely used for drinking water treatment. Ozone can be added at several points throughout the treatment system, such as during pre-oxidation, intermediate oxidation, or final disinfection. Usually, it is recommended to use ozone for pre-oxidation before a sand filter or an active carbon filter (GAC). After ozonization, these filters can remove the remaining organic matter (important for final disinfection).

Hence the correct answer is option D.

ISRO Draughtsman Civil Mock Test - 9 - Question 21

The modulus of elasticity of steel is more than that of concrete. It indicates that steel is

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 21
The modulus of elasticity of steel is about 200 GPa or 29,000,000 psi, and the modulus of elasticity of concrete is around 30 GPa or 4,350,000 psi. The modulus of elasticity of aluminum is 69 GPa or 10,000,000 psi.

Hence the correct answer is option B.

ISRO Draughtsman Civil Mock Test - 9 - Question 22

Bernoulli's equation refers to the conservation of-

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 22
Bernoulli's equation can be viewed as a conservation of energy law for a flowing fluid. We saw that Bernoulli's equation was the result of using the fact that any extra kinetic or potential energy gained by a system of fluid is caused by external work done on the system by another non-viscous fluid.
ISRO Draughtsman Civil Mock Test - 9 - Question 23

For an irrigational flow, the velocity potential lines, and the streamlines are always-

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 23
For an irrigational flow, the velocity potential lines and the streamlines are always orthogonal to each other.
ISRO Draughtsman Civil Mock Test - 9 - Question 24

To avoid segregation, fresh concrete should be dropped from a height of-

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 24
To avoid segregation, fresh concrete should be dropped from a height of Less than one meter.
ISRO Draughtsman Civil Mock Test - 9 - Question 25

The commonly used thinner in oil paints,

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 25
Common solvents used as paint thinners include:
  • Mineral spirits (US) / White spirit (UK)

  • Acetone.

  • Turpentine.

  • Naphtha.

  • Toluene.

  • Methyl ethyl ketone (MEK)

  • Dimethylformamide (DMF)

  • 2-Butoxyethanol, or any of the other glycol ethers.

ISRO Draughtsman Civil Mock Test - 9 - Question 26

The distribution system in water supplies is designed on the basis of:

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 26
The distribution system in water supplies is designed based on the gravitational pull, such as the purified water in the gravity system flow wholly under gravity.
ISRO Draughtsman Civil Mock Test - 9 - Question 27

A groyne pointing upstream is known as :

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 27
A groyne pointing upstream is known as repelling groyne whereas groyne pointing downstream is known as attracting groyne.

Hence, the correct option is (B)

ISRO Draughtsman Civil Mock Test - 9 - Question 28

The flow of water in a wash hand basin when it is being emptied through a central opening, is an example of-

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 28
The flow of water in a wash hand basin when it is being emptied through a central opening, is an example of a free vortex.

Free vortex- Free and Forced Vortex flow with Examples states: When no external torque is required to rotate the fluid mass that type of flow is called free vortex flow.

Examples: Flow of liquid through a hole provided at the bottom of the container.

Hence, the correct option is (A)

ISRO Draughtsman Civil Mock Test - 9 - Question 29

Modulus of subgrade reaction using 30 cm diameter plates is obtained as 200 N/cm3. The value of the same (in N/cm3) using the standard plate will be

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 29
Standard plate diameter is 75 cm.

K1D1 = K2D2

200 × 30 = K2 × 75

K2 = 80 kg/cm2

ISRO Draughtsman Civil Mock Test - 9 - Question 30

If W is the load in a circular slab of radius R, the maximum radial moment at the center of the slab is

Detailed Solution for ISRO Draughtsman Civil Mock Test - 9 - Question 30

Radial moment at the centre of the Circular slab is

Where MR = Radial moment

R = radius of slab

μ = Poisson’s ratio

r = any section at a distance r from centre of the slab

W = load on circular slab

For the maximum radial moment at centre

r = 0 and μ = 0

Therefore,

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