CURRENT AFFAIRS

2019

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How many American astronauts are successfully replaced ageing batteries on ISS?
A
5
B
3
C
4
D
2
Explanation: 

Detailed explanation-1: -The International Space Station got a power upgrade today (March 22) as two NASA astronauts took a spacewalk to install new batteries on the station’s solar arrays.

Detailed explanation-2: -The space station is now equipped with 24 lithium-ion batteries to store power collected by the solar panels. The big, boxy batteries, surpassing 400 pounds (180 kilograms) each, provide electricity for the orbiting lab when it’s on the night side of Earth.

Detailed explanation-3: -In its final configuration, the space station now has three lithium-ion batteries for each channel, each with a service life lasting nearly 10 years. With eight channels, 24 lithium-ion batteries on board replaced 48 nickel-hydrogen batteries.

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