October 20th Static Quiz on Science and Technology
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October 20th Static Quiz on Science and Technology
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- Question 1 of 10
1. Question
What is “Virtual Private Network”? (2011 UPSC Pyq)
CorrectAns:- b) It is a computer network across a public internet that provides users access to their organization’s network while maintaining the security of the information transmitted
Explanation;-
A Virtual Private Network (VPN) allows you to create a secure connection to another connection over the Internet. It is also used to access websites that are restricted in a particular region or to protect your browsing activity while using public Wi-Fi and more.IncorrectAns:- b) It is a computer network across a public internet that provides users access to their organization’s network while maintaining the security of the information transmitted
Explanation;-
A Virtual Private Network (VPN) allows you to create a secure connection to another connection over the Internet. It is also used to access websites that are restricted in a particular region or to protect your browsing activity while using public Wi-Fi and more. - Question 2 of 10
2. Question
What is the difference between Bluetooth and Wi-Fi devices? (2011 UPSC Pyq)
CorrectAns:- c) When information is transmitted between two devices using Blue-tooth technology, the devices have to be in the line of sight of each other, but when Wi-Fi technology is used the devices need not be in the line of sight of each other
Explanation;-
Difference between Bluetooth and WIFI;-
IncorrectAns:- c) When information is transmitted between two devices using Blue-tooth technology, the devices have to be in the line of sight of each other, but when Wi-Fi technology is used the devices need not be in the line of sight of each other
Explanation;-
Difference between Bluetooth and WIFI;-
- Question 3 of 10
3. Question
Satellites used for telecommunication relay are kept in a geostationary orbit. A satellite is said to be in such an orbit when: (2011 UPSC Pyq)
1. The orbit is geosynchronous.
2. The orbit is circular.
3. The orbit lies in the plane of the Earth’s equator.
4. The orbit is at an altitude of 22,236 km.
Select the correct answer using the codes given below:CorrectAns:- a) 1, 2 and 3 only
Explanation;-
A geostationary orbit, also referred to as a geosynchronous equatorial orbit, is a circular geosynchronous orbit 35,786 kilometres above Earth’s equator and following the direction of Earth’s rotation.IncorrectAns:- a) 1, 2 and 3 only
Explanation;-
A geostationary orbit, also referred to as a geosynchronous equatorial orbit, is a circular geosynchronous orbit 35,786 kilometres above Earth’s equator and following the direction of Earth’s rotation. - Question 4 of 10
4. Question
A genetically engineered form of brinjal, known as the Bt-brinjal, has been developed. The objective of this is (2011 UPSC Pyq)
CorrectAns:- a) To make it pest-resistant
Explanation;-GM Crops in India
A GM or transgenic crop is a plant that has a novel combination of genetic material obtained through the use of modern biotechnology.
For example, a GM crop can contain a gene(s) that has been artificially inserted instead of the plant acquiring it through pollination.
In India, the Genetic Engineering Appraisal Committee (GEAC) is the apex body that allows for commercial release of GM crops.
Penalty: Use of the unapproved GM variant can attract a jail term of 5 years and fine of Rs 1 lakh under the Environmental Protection Act ,1986
Bt cotton is India’s first genetically modified crop, to be approved for commercialization.
India has the world’s 5th largest GM crop acreage after the USA, Brazil, Argentina, and Canada
Presently majority of India’s cotton cultivation area is under Bt cotton crops.
Bt brinjal was developed by Mahyco (Maharashtra Hybrid Seeds Company) in collaboration with the Dharwad University of Agricultural Sciences and the Tamil Nadu Agricultural University.IncorrectAns:- a) To make it pest-resistant
Explanation;-GM Crops in India
A GM or transgenic crop is a plant that has a novel combination of genetic material obtained through the use of modern biotechnology.
For example, a GM crop can contain a gene(s) that has been artificially inserted instead of the plant acquiring it through pollination.
In India, the Genetic Engineering Appraisal Committee (GEAC) is the apex body that allows for commercial release of GM crops.
Penalty: Use of the unapproved GM variant can attract a jail term of 5 years and fine of Rs 1 lakh under the Environmental Protection Act ,1986
Bt cotton is India’s first genetically modified crop, to be approved for commercialization.
India has the world’s 5th largest GM crop acreage after the USA, Brazil, Argentina, and Canada
Presently majority of India’s cotton cultivation area is under Bt cotton crops.
Bt brinjal was developed by Mahyco (Maharashtra Hybrid Seeds Company) in collaboration with the Dharwad University of Agricultural Sciences and the Tamil Nadu Agricultural University. - Question 5 of 10
5. Question
At present, scientists can determine the arrangement or relative positions of genes or DNA sequences on a chromosome. How does this knowledge benefit us? (2011 UPSC Pyq)
1. It is possible to know the pedigree of livestock.
2. It is possible to understand the causes of all human diseases.
3. It is possible to develop disease-resistant animal breeds.
Which of the statements given above is/are correct?CorrectAns:- d) 1, 2 and 3
Explanation;- Self ExplanatoryIncorrectAns:- d) 1, 2 and 3
Explanation;- Self Explanatory - Question 6 of 10
6. Question
The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. What is the reason? (2011 UPSC Pyq)
CorrectAns;- c) The density of water is maximum at 4°C
Explanation;-At 4 °C, the clusters start forming. The molecules are still slowing down and coming closer together, but the formation of clusters makes the molecules be further apart. Cluster formation is the bigger effect, so the density starts to decrease. Thus, the density of water is a maximum at 4 °C.
IncorrectAns;- c) The density of water is maximum at 4°C
Explanation;-At 4 °C, the clusters start forming. The molecules are still slowing down and coming closer together, but the formation of clusters makes the molecules be further apart. Cluster formation is the bigger effect, so the density starts to decrease. Thus, the density of water is a maximum at 4 °C.
- Question 7 of 10
7. Question
The function of heavy water in a nuclear reactor is to (2011 UPSC Pyq)
CorrectAns:- a) Slow down the speed of neutrons
Explanation;-Water containing significantly more than the natural proportions (one in 6,500) of heavy hydrogen (deuterium, D) atoms to ordinary hydrogen atoms.
Heavy water is used as a moderator in some reactors because it slows down neutrons effectively and also has a low probability of absorption of neutrons.
IncorrectAns:- a) Slow down the speed of neutrons
Explanation;-Water containing significantly more than the natural proportions (one in 6,500) of heavy hydrogen (deuterium, D) atoms to ordinary hydrogen atoms.
Heavy water is used as a moderator in some reactors because it slows down neutrons effectively and also has a low probability of absorption of neutrons.
- Question 8 of 10
8. Question
What is the difference between a CFL and an LED lamp? (2011 UPSC Pyq)
1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semiconductor material.
2. The average life span of a CFL is much longer than that of an LED lamp.
3. A CFL is less energy-efficient as compared to an LED lamp.
Which of the statements given above is/are correct?CorrectAns:- C) 1 and 3 only
Explanation;-
CFL bulbs, are more energy efficient than incandescent bulbs, but not as efficient as LEDs. The average lifespan of CFLs is about 8,000 hours, compared to the 25,000-hour lifetime of LEDs, that comes out to about three CFL bulbs for every one LED purchase.IncorrectAns:- C) 1 and 3 only
Explanation;-
CFL bulbs, are more energy efficient than incandescent bulbs, but not as efficient as LEDs. The average lifespan of CFLs is about 8,000 hours, compared to the 25,000-hour lifetime of LEDs, that comes out to about three CFL bulbs for every one LED purchase. - Question 9 of 10
9. Question
A new optical disc format known as the Blu-ray Disc (BD) is becoming popular. In what way is it different from the traditional DVD? (2011 UPSC Pyq)
1. DVD supports Standard Definition video while BD supports High Definition video.
2. Compared to a DVD, the BD format has several times more storage capacity.
3. Thickness of BD is 2.4 mm while that of DVD is 1.2 mm.
Which of the statements given above is/are correct?CorrectAns;- b) 1 and 2 only
Explanation;-
The thickness of Blu Ray disc is actually small than the DVDIncorrectAns;- b) 1 and 2 only
Explanation;-
The thickness of Blu Ray disc is actually small than the DVD - Question 10 of 10
10. Question
A married couple adopted a male child, A few years later; twin boys were born to them. The blood group of the couple is AB positive and O negative. The blood group of the three sons is A positive, B positive, and O positive. The blood group of the adopted son is (2011 UPSC Pyq)
CorrectAns;- a) O Positive
Explanation;-
The blood group of the parents are AB and O, the child’s blood group may be A or B and since the boy is adopted and it is given in the question that the blood group of the three sons are A+, B+, O+
The blood group of the adopted son will be a) O positive
One of the parent’s blood group is AB⁺, his cell will undergo division to form single chromosome cells during reproduction either A⁺ cell or B⁺ cell.
Other parent has blood group O⁻ which will remain same during reproduction.
Hence the offspring thus produced may have the following configuration :
1) A⁺ and O⁻ results in A⁺
2) B⁺ and O⁻ results in B⁺
hence their offspring’s can have only either A⁺ or B⁺ blood groups.
So The blood group of the adopted son will be a) O positiveIncorrectAns;- a) O Positive
Explanation;-
The blood group of the parents are AB and O, the child’s blood group may be A or B and since the boy is adopted and it is given in the question that the blood group of the three sons are A+, B+, O+
The blood group of the adopted son will be a) O positive
One of the parent’s blood group is AB⁺, his cell will undergo division to form single chromosome cells during reproduction either A⁺ cell or B⁺ cell.
Other parent has blood group O⁻ which will remain same during reproduction.
Hence the offspring thus produced may have the following configuration :
1) A⁺ and O⁻ results in A⁺
2) B⁺ and O⁻ results in B⁺
hence their offspring’s can have only either A⁺ or B⁺ blood groups.
So The blood group of the adopted son will be a) O positive
