science & tech MCQ section 3 Practice Questions Answers Test with Solutions & More Shortcuts
science & tech PRACTICE TEST [7 - EXERCISES]
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science & tech MCQ section 7
Question : 31 [SSC CGL (Pre)2007]
An astronaut in outer space will observe sky as
a) black
b) red
c) blue
d) white
Answer »Answer: (a)
Space is black because there are no substances or objects to reflect back any colour (or all colours, which would make it white). That is also why the astronauts see the earth as we see it in photos, but the space around it is black.
The light from the sun is reflected back as the blues and greens and browns that we see, but the space around the earth is just that - empty space and therefore does not reflect back any colours, so it is black.
Question : 32
Consider the following statements:
- Polar Remotely Operated Vehicle (PROVe) was successfully operationalised for research in North Antarctica by National Institute of Ocean Technology (NIOT).
- It is India’s second Polar Remotely Operated Vehicle (PROVe) in North Antarctica.
- It will help researchers to study and find out details about dissolved oxygen in sea bottom, salinity and the quantity of sunlight hitting the bottom of the sea.
a) 1 and 3 only
b) 2 and 3 only
c) 1 and 2 only
d) All of the above
Answer »Answer: (a)
It is India’s first Polar Remotely Operated Vehicle (PROVe) in North Antarctica.
Question : 34
Consider the following statements regarding the armed forces:
- First batch of women pilots was commissioned in Indian Air Force in 1996
- Officers’ Training Academy is located in Nagpur
- Southern Command of Indian Navy has it headquarters at Chennai.
- One of the Regional Headquarters of Coast Guard is located at Port Blair
a) 2, 3 and 4
b) 3 only
c) 1, 2, 3 and 4
d) 4 only
Answer »Answer: (c)
All the four statements are correct
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