Science & Technology Current Affairs MCQs
41. Spheroidal carbonaceous particle is a component of?
[A] Fly Ash
[B] Saw Dust
[C] Dry Ice
[D] Common Salt
Correct Answer: A [Fly Ash]
Spheroidal carbonaceous particle (SCP) is a component of fly ash and is a by-product of industrial high-temperature combustion of coal and fuel-oil.
Recently, researchers from British Antarctic Survey and the University College London, for the first time identified SCP in an Antarctic ice core. The sample dated back to 1936, indicating physical markers of fossil fuel combustion have been trapped in ice layers for decades.
42. What is the expansion of SAF, which was seen in the news?
[A] Supporting Aviation Fuel
[B] Sustainable Aviation Fuel
[C] Sweeping Aviation Fuel
[D] Silent Aviation Fuel
Correct Answer: B [Sustainable Aviation Fuel]
The Sustainable aviation fuel (SAF) or bio-jet fuel is used to power aircraft with minimum carbon footprint.
Recently, the Indian Institute of Petroleum has tied up with Indigo, Spicejet and the three Tata Airlines to support the production of the SAF.
43. Which institution developed a catalyst that can release hydrogen from wood alcohol without producing carbon dioxide?
[A] IIT Madras
[B] IIT Delhi
[C] IIT Guwahati
[D] IIT Kharagpur
Correct Answer: C [IIT Guwahati]
Liquid Organic Hydrogen Carrier is an organic compound that is capable of absorbing and releasing hydrogen through chemical reactions.
Researchers in IIT Guwahati have developed a catalyst that can release hydrogen gas from wood alcohol without the side production of carbon dioxide. This method makes methanol a promising LOHC.
44. ‘Cryosat’ is a programme associated with which space agency?
Correct Answer: B [ESA]
Cryosat is an European Space Agency (ESA) Earth observer that carries an instrument called a radar altimeter to study the variations in height among the planet’s surface and the changes in ice fields.
It has tracked 200,000 or so glaciers and revealed that they have lost 2,720 billion tonnes of ice in a decade because of climate change.
45. Which space agency has developed the ‘Exobiology Extant Life Surveyor (EELS)’?
Correct Answer: C [NASA]
Exobiology Extant Life Surveyor (EELS) is a snake-like robot that is developed by NASA. It will examine the surface of Saturn’s moon, Enceladus, and study its icy features.
EELS uses a rotating propulsion unit that act as tracks, gripping mechanisms and propeller units underwater.
46. The Asteroid Belt is situated between which planets?
[A] Mars and Jupiter
[B] Jupiter and Saturn
[C] Saturn and Neptune
[D] Mercury and Venus
Correct Answer: A [Mars and Jupiter]
Comet Read is the main belt comet that is found in the main asteroid belt but has a halo or coma and a tail like a comet. It is one of the three comets used to establish the category of main belt comets.
James Webb Space Telescope’s finding is intriguing because this is the first-time water has been found in the main asteroid belt, which is located between Mars and Jupiter.
47. Scientists from the Indian Institute of Astrophysics (IIA) have proposed a new metric named ‘rms’. What is the expansion of rms?
[A] Right mean square
[B] Root mean square
[C] Right meter square
[D] Root meter square
Correct Answer: B [Root mean square]
Scientists from the Indian Institute of Astrophysics (IIA) have proposed a new metric called the root mean square (rms) granulation contrast.
Its purpose is to quantify the image quality of ground-based solar telescopes.
48. What is ‘BL Lacertae’, which was seen in the news recently?
[A] Exo planet
Correct Answer: B [Blazar]
BL Lacertae (BL Lac) is a blazar situated some 950 million light years away from Earth.
The Indian Astronomical Observatory located in Hanle of Ladakh has collaborated with 10 other global telescopes to observe the brightening of this blazar.
49. ‘Orbitofrontal Cortex’ is an area in which part of the body?
Correct Answer: B [Brain]
The orbitofrontal cortex is an area in brain where information about reward value of odours and identity are represented.
In a new study, researchers were able to train an algorithm to predict a person experiencing pain based on the signals in the orbitofrontal cortex region of the brain.
50. XPoSat, India’s first polarimetry mission, is being built by which institution?
Correct Answer: C [ISRO]
XPoSat (X-Ray Polarimeter Satellite) is India’s first polarimetry mission. It is currently being built by ISRO and Raman Research Institute.
According to ISRO, “XPoSat will study various dynamics of bright astronomical X-ray sources in extreme conditions” and will carry two payloads. It is only the world’s second polarimetry mission to study various dynamics of bright astronomical X-ray sources in extreme conditions.
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