Hello Everyone, here we are with the solution set of Friday Science Quiz #11. Now, verify your answers with our key and explanations. Write your correct and incorrect in the comment section, so that you can compare your performance with others.
[Solutions]
Q1. For which of the following is capillarity not the only reason?
a) Blotting of ink
b) Rising of underground water
c)Spread of water drop on a cotton cloth
d)Rising of water from the roots of a plant to its foliage
Ans -[B]. This question was asked in UPSC,1999. The catch is that the question is asking “not the only reason”. Hence, option B is the most suitable one as rise of underground water happens due to many other reasons as well e.g. recharge due to high rainfall, recharge due to irrigation etc.
Q2. LISA project is associated with
a) Study of ocean currents
b) AIDS test
c) Study of gravitational waves
d) Study of earthquake waves.
Ans – [C]. LISA, the Laser Interferometer Space Antenna project is a project to study the gravitational waves.
Q3. Bedaquiline is a drug used to treat
a) Cancer
b) Tuberculosis
c) Japenese Enciphalatis
d) None of these
Ans- [B]. Bedaquiline is a drug for the treatment of drug resistant TB. In India the drug will be introduced in 104 districts across 5 states.
Q4. Consider the following statements about a thermos flask:
1. It is a practical device in which the heat flowing into or out of the system by conduction,convection or radiation is used as much as possible
2. It consists of a double walled glass vessel
3. The heat transfer by convection is minimised by silvering the surfaces and the radiation is minimised by evacuating the space between the walls
Which if the statements given above is/are true?
a) 1 and 2 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2 and 3
Ans -[A]. Statement 3 is wrong. The heat transfer by radiation is minimised by silvering the surfaces and ctransfer of heat by onduction is minimised by evacuation space between the walls.
Q5. Consider the following statements regarding Reusable Launch Vehicle (RLV):
1. It is a vehicle which on taking the satellite into the space, comes back to the earth and can be used for future launches
2. India is the first country to test Reusable Launch Vehicle
3. One of the advantages of RLV is that it will not add up to the space debris
Which of the statements given above is/are true?
a) 1 and 2 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2 and 3
Ans – [C]. India is not the first country to test RLV. US, Japan, France and Russia have also tested it. Rest all the statements are true.
Q6. A person stands at the middle point of a wooden ladder which starts slipping between a vertical wall and the floor of a room, while continuing to remain in a vertical plane. The path traced by a person standing at the middle point of the slipping ladder is :
a) a straight line
b) a elliptical path
c)a circular path
d) a parabolic path
Ans- [C].
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