General Knowledge Practice Questions for CDS. General Knowledge Quiz for CDS. Practice Set for CDS Exam. Welcome to the www.pridedefence.co online General Knowledge Practice section. If you are preparing for NDA/CDS and AFCAT & Others Defence Exams, you will come across a section on General Knowledge Section. Here we are providing you with General Knowledge quiz on “General Knowledge Practice Set for CDS Exam 2019-20″ for your daily practice.
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General Knowledge Practice Questions Set for NDA/CDS & Defence Exams |Set- 3|
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Question 1 of 10
1. Question
Category: General KnowledgeWhich one of the following elements is used as a timekeeper in atomic clocks?
Correct
B. Caesium
- 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.
Incorrect
B. Caesium
- 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.
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Question 2 of 10
2. Question
Category: General KnowledgeWhich one of the following elements is involved in the control of water content of the blood?
Correct
A. Potassium
- 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.
Incorrect
A. Potassium
- 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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Question 3 of 10
3. Question
Category: General KnowledgeWhich one of the following gases dissolves in water to give acidic solution?
Correct
A. Carbon dioxide
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)
Incorrect
A. Carbon dioxide
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)
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Question 4 of 10
4. Question
Category: General KnowledgeWhich one of the following elements is essential for the formation of chlorophyll in green plants?
Correct
C. Magnesium
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
Incorrect
C. Magnesium
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
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Question 5 of 10
5. Question
Category: General KnowledgeWhy is argon gas used along with tungsten wire in an electric bulb?
Correct
A. To increase the life of the bulb
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.
Incorrect
A. To increase the life of the bulb
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.
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Question 6 of 10
6. Question
Category: General KnowledgeWhich one of the following is the correct relation between the Kelvin temperature (T) and the Celsius temperature (tc)?
Correct
D. T = (tc +273.15)
0ºC is equivalent to 273.15K so add 273.15 in Celsius to obtain Kelvin.
Incorrect
D. T = (tc +273.15)
0ºC is equivalent to 273.15K so add 273.15 in Celsius to obtain Kelvin.
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Question 7 of 10
7. Question
Category: General KnowledgeSound waves cannot travel through a
Correct
D. Wooden hollow pipe placed in vacuum.
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.
Incorrect
D. Wooden hollow pipe placed in vacuum.
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.
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Question 8 of 10
8. Question
Category: General KnowledgeConsider 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.
Which of the statements given above is/are correct?
Correct
C. 1 and 2 only
- 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.
Incorrect
C. 1 and 2 only
- 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.
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Question 9 of 10
9. Question
Category: General KnowledgeWorking 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
Select the correct answer using the code given below.
Correct
C. 3 and 4 only
- 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.
Incorrect
C. 3 and 4 only
- 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.
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Question 10 of 10
10. Question
Category: General KnowledgeWhich one of the following is a true fish as per the biological system of classification?
Correct
D. Flying fish
Flying fish is a true fish, other are not because they belong to the following phylum
Animals Phylum Silver fish Anthropoda Jelly fish Cnidaria Cuttle fish Mollesca Incorrect
D. Flying fish
Flying fish is a true fish, other are not because they belong to the following phylum
Animals Phylum Silver fish Anthropoda Jelly fish Cnidaria Cuttle fish Mollesca
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