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CDS I - General Knowledge Previous Year Question Paper 2018 - CDS MCQ


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30 Questions MCQ Test CDS (Combined Defence Services) Mock Test Series 2024 - CDS I - General Knowledge Previous Year Question Paper 2018

CDS I - General Knowledge Previous Year Question Paper 2018 for CDS 2024 is part of CDS (Combined Defence Services) Mock Test Series 2024 preparation. The CDS I - General Knowledge Previous Year Question Paper 2018 questions and answers have been prepared according to the CDS exam syllabus.The CDS I - General Knowledge Previous Year Question Paper 2018 MCQs are made for CDS 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for CDS I - General Knowledge Previous Year Question Paper 2018 below.
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CDS I - General Knowledge Previous Year Question Paper 2018 - Question 1

Which one of the following elements is used as a timekeeper in atomic clocks?

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 1
  • Caesium (Cs-133) is used as timekeeper in atomic clocks.
  • Cesium is used because of its high resonant frequency of 9,192,631,770 Hz.
  • Atomic clocks are the most accurate timekeeping device with an error of about 1 second in 100 million years.
  • They are used to calculate International Atomic Time (IAT), local time around the world and in satellite navigation system.
CDS I - General Knowledge Previous Year Question Paper 2018 - Question 2

Which one of the following elements is involved in the control of water content of the blood?

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 2
  • Potassium and Sodium are involved in the control of water content of blood.
  • More Sodium and Potassium content results in more water content in blood
  • This excess water in blood leads to high blood pressure.
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CDS I - General Knowledge Previous Year Question Paper 2018 - Question 3

Which one of the following gases dissolves in water to give acidic solution?

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 3

The presence of Carbon dioxide in water makes an acidic solution. Carbon dioxide in addition with water forms Carbonic acid (H2CO3).
CO2 + H2O → H2CO3 (Carbonic acid)

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 4

Which one of the following elements is essential for the formation of chlorophyll in green plants?

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 4

Magnesium is essential for the formation of chlorophyll. Without Magnesium plants are not able to capture sunlight that is essential for photosynthesis.

The chemical equation for photosynthesis is as follows-
6CO2 + 6H2O  C6H12O6 + 6O2
Carbon-di-oxide + Water  Glucose(energy) + Oxygen

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 5

Consider the following chemical reaction: aFe2O3 (s) + bCO(g) → cFe (s) + dCO2

In the balanced chemical equation of the above, which of the following will be the values of the coefficients a, b, c and d respectively?

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 5

In a balanced chemical equation, the no of atoms in reactant side are equal to number of atoms in product side.

Step 1- Balance Fe coefficients (a) L.H.S and (c) R.H.S.

Substitute a = 1, c = 2
Step 2- Now balance Carbon coefficients (b) and (d) must be the same 3 on each side.
b = d = 3

So,
a = 1, b = 3, c = 2, d = 3

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 6

Why is argon gas used along with tungsten wire in an electric bulb?

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 6

Argon gas is used in electric bulbs to stop the oxygen in the light bulbs from corroding the hot tungsten filament which in result increase the life of a bulb.

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 7

Which one of the following is the correct relation between the Kelvin temperature (T) and the Celsius temperature (tc)?

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 7

0ºC is equivalent to 273.15K so add 273.15 in Celsius to obtain Kelvin.

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 8

Sound waves cannot travel through a _________.

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 8

Sound wave cannot travel through a wooden hollow pipe placed in vacuum.
Sound energy transfer in form of vibrations, these vibrations need matter to travel, absence of matter in vacuum makes these waves impossible to travel.

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 9

Which one of the following is the value of one nanometer?

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 9

1nm = 10-9m, or we can say 10-7cm

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 10

Consider the following statements:
1. There is no net moment on a body which is in equilibrium.
2. The momentum of a body is always conserved.
3. The kinetic energy of an object is always conserved.

Q. Which of the statements given above is/are correct?

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 10
  • Statement 1- For a body to be in equilibrium net force on the object must be zero which results in zero net moment.
  • Statement 2- According to Newton’s First Law If a body continues in its state of rest or of uniform motion unless acted upon by an external force. So linear momentum of a body on which no external force acts is conserved.
  • Statement 3- In inelastic collision Kinetic energy is transfer from one body to other so kinetic energy always do not remain conserve.So only statement 1 and 2 are correct.
CDS I - General Knowledge Previous Year Question Paper 2018 - Question 11

Working of safety fuses depends upon

1. magnetic effect of the current
2. chemical effect of the current
3. magnitude of the current
4. heating effect of the current

Q. Select the correct answer using the code given below.

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 11
  • Magnetic and chemical effect of current has no effect on the working of safety fuse.
  • Magnitude and heating effect of current are responsible for the working of safety fuse. A fuse has a metal wire or strip with low melting point that melts when too much current flows through it. Melting of which depends on the amount of current passing through which causes heating effect.
  • So only option 3 and 4 are correct.
CDS I - General Knowledge Previous Year Question Paper 2018 - Question 12

Directions: The following seven (7) items consist of two statements, Statement I and Statement II. Examine these two statements carefully and select the correct answer using the code given below.

Statement I: By far the most common topographic form in a Karst terrain is the sinkhole.
Statement II: Topographically, a sinkhole is a depression that varies in depth from less than a meter to few hundred meters.

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 12

Both the statements are individually true, but Statement II is not the correct explanation of Statement I

Statement 1- Karst topography is formed by the dissolution of soluble rocks like limestone, sandstone, forming underground drainage sinkholes and caves.

Statement 2- These sinkholes may vary in size in depth from a meter to a few hundred meters.

Statement 1 shows the characteristic of Karst and Statement 2 defines sinkhole. Both the statements are individually true, but Statement II is not the correct explanation of Statement I.

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 13

Directions: The following seven (7) items consist of two statements, Statement I and Statement II. Examine these two statements carefully and select the correct answer using the code given below.

Statement I: Incised meanders are formed in the mature stage of a river.
Statement II: Incised meanders are characterized by rejuvenation and upliftment of land.

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 13

Both the statements are individually true, and Statement II is the correct explanation of Statement I

Incised meanders form during the mature stage of the river at which rivers initially started flowing and there were only plain areas and not enough highlands. Now, with the passage of time as Mountains and Plateaus rise, the meandering course of these rivers starts vertical erosion and Incised meanders are formed.

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 14

Directions: The following seven (7) items consist of two statements, Statement I and Statement II. Examine these two statements carefully and select the correct answer using the code given below.

Statement I: Portions of glacial troughs may exhibit remarkably flat floors.
Statement II: The flat floor in a glacial trough is produced by uniform glacial erosion.

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 14

Both the statements are individually true, and Statement II is the correct explanation of Statement I

Statement 1- Glacier troughs tend to have flat valley floors and steep, straight sides depending on the glacier erosion.

Statement 2- A flat floor glacier trough is a result of uniform glacier erosion.

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 15

Directions: The following seven (7) items consist of two statements, Statement I and Statement II. Examine these two statements carefully and select the correct answer using the code given below.

Statement I: In Tundra climate, biodiversity is comparatively less.
Statement II: Tundra climate has less reproductive warm period.

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 15

Both the statements are individually true, but Statement II is not the correct explanation of Statement I

Statement 1- Tundra climate is usually found between the 60-75-degree latitude lines. Tundra climate areas experience a very harsh winter with a temperature of about -18 to -50 and a cool summer. As a result, this region has less biodiversity.

Statement 2- During the summer, much of the snow and ice melts and forms soggy marshes and bogs, making condition worse and a less reproductive warm period.

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 16

Directions: The following seven (7) items consist of two statements, Statement I and Statement II. Examine these two statements carefully and select the correct answer using the code given below.

Statement I: Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the rotation of the Earth.
Statement II: The Earth rotates from west to east.

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 16

Both the statements are individually true, but Statement II is not the correct explanation of Statement I

Statement 1- Tides are the rise and fall of the levels of the ocean. Tides are caused by the gravitational pull of the Sun and Moon as well as the rotation of the Earth.

Statement 2- The direction of rotation of Earth is from West to East or left to right.

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 17

Directions: The following seven (7) items consist of two statements, Statement I and Statement II. Examine these two statements carefully and select the correct answer using the code given below.

Statement I: A person may suffer from tuberculosis if she/he frequently visits a crowded place.
Statement II: Bacteria of tuberculosis spread through droplets by sneezing or coughing.

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 17

Statement I is false but Statement II is true

Tuberculosis is a communicable disease caused by transferring of bacteria from infected person to a normal person by sneezing or coughing and that do not deal with visiting a crowded place until infected person and bacteria in the air.

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 18

Directions: The following seven (7) items consist of two statements, Statement I and Statement II. Examine these two statements carefully and select the correct answer using the code given below.

Statement I: Bioaccumulation is a process of progressive accumulation of heavy metals and pesticides in an organism.
Statement II: Large fishes of the pond are found to have higher concentration of pesticides than planktons of the same pond

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 18

Both the statements are individually true but statement 2 is not the correct explanation of statement 1.

Statement 1- Bioaccumulation is the process of accumulation of chemicals in an organism like pesticides, heavy metals and toxic substance that leads to threat to health, life and to environment.

Statement 2- Planktons are primary producer and large fishes are tertiary consumer which consume producers i.e. planktons and other small fishes that result in biomagnification or increase in the concentration of pesticides thus due to intake large fishes of the pond are found to have higher concentration of pesticides than planktons of the same pond.

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 19

Which one of the following is a true fish as per the biological system of classification?

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 19

Flying fish is a true fish, other are not because they belong to the following phylum

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 20

In which one of the following types of connective tissues in animals does fat get stored?

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 20

Adipocyte are also known as lipocytes, their primary function is to store fat.

The function of other tissues are as follows

Chondrocytes - produce and maintain the cartilaginous matrix

Osteocyte- maintain strength and health of bone matrix.

Reticulocyte - Red blood cell formation.

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 21

Which one of the following pairs about organ/part that helps in locomotion is not correctly matched?

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 21

The correct organ help in locomotion of the following are as follows

Euglena : Flagellum
Paramecium : Cilia
Nereis : Parapodia
Starfish : Tube Feet

All are mentioned correct except Nereis whose organ is Parapodia.

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 22

Lysosome is formed from which of the following cell organelles?

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 22

Lysosomes are formed by the fusion of Golgi network with endosomes, which contain molecules taken up by endocytosis at the plasma membrane. Lysosomes are tiny sack filled with fluid containing digestive enzymes that acts as a biological catalyst. The main function of lysosomes is to remove waste as well as destroying a cell after it has died. They are also known as garbage disposal of cells.

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 23

A protein is synthesized in the endoplasmic reticulum bound ribosomes and it targets to the inner thylakoid space of chloroplast. How many double-layered membranes layers it has to pass to reach its destination?

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 23

The protein synthesized in the endoplasmic reticulum has to pass 3 double-layered membrane layers to reach inner thylakoid space of chloroplast.

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 24

Which of the following causes adiabatic temperature changes in atmosphere?

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 24

Expansion and compression of air causes adiabatic temperature changes in atmosphere.

As air is heated it becomes less dense and this air parcel moves to upper atmosphere. This air parcel continues to expand resulting in less heat available per unit volume which causes change in atmospheric temperature.

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 25

Which one of the following is applicable to collision-coalescence process of precipitation?

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 25
  • Collision coalescence process is an important mechanism in formation of raindrops in warmer clouds or we can say whose temperature do not extend beyond the freezing level.
  • This phenomenon cannot occur in cirrocumulus clouds because they are made up of ice crystals and supercooled water.
CDS I - General Knowledge Previous Year Question Paper 2018 - Question 26

Which one of the following places of India experiences highest atmospheric pressure during winter?

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 26

Leh is the place in India that experiences highest atmospheric pressure during winter.

During the winter season, the weather in India is typically influenced by the pressure distribution in the Central and in Western Asia. A high-pressure centre is developed on the Northern side of the Himalayan range and it accounts for the air movement from the Northern side towards the Southern side of the mountain range.

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 27

Match List-I with List-II and select the correct answer using the code given below the

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 27

Propounder of given theories are as follows-

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 28

Bright light is found to emit from photographer’s flashgun. This brightness is due to the presence of which one of the following noble gases?

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 28

Xenon gas is used in photographer’s flashgun

A Xenon flashgun produces an extremely intense full-spectrum white light for a very short duration. It consists of a glass tube filled with xenon gas which emits a short and very bright flash of white light when a high voltage is applied to it.

CDS I - General Knowledge Previous Year Question Paper 2018 - Question 29

Which one of the following is not a characteristic of a compound?

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 29
  • A compound is a substance formed when two or more elements chemically bonded together. So, all particles of the compound cannot have the same particles. If it has the same particles, then it will be referred to as an element.
  • The elements of compound are chemically combined, so they cannot be separated by simple physical methods.
CDS I - General Knowledge Previous Year Question Paper 2018 - Question 30

Which of the following substances cause temporary hardness in water?
1. Mg (HC03)2
2. Ca (HC03)2
3. CaCl2
4. MgS04

Select the correct answer using the code given below.

Detailed Solution for CDS I - General Knowledge Previous Year Question Paper 2018 - Question 30
  • Mg (HCO3)2 Magnesium Hydrogen Carbonate and Ca (HCO3)Calcium bicarbonate cause temporary hardness in water.
  • Hard water is water that contains cations with a charge of +2, especially Ca2+ and Mg2+ Hence, both the salts mentioned above impart hardness to water. Hardness of water can be removed by boiling water, ion exchange process, Calgon process, by adding washing soda etc.
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