February 2024 Edition
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February 2024 Current Affairs MCQs & Solutions
Top national & international current affairs questions for CSS, PMS, FPSC, PPSC, and NTS screening tests.
#1961
Which city hosted the 2024 UN Climate Summit?
(a) New York
(b) Paris
(c) Nairobi
(d) Tokyo
Explanation: COP29 convened in Paris in late 2024, focusing on implementation of the 1.5 °C target.
#1962
Which country launched the first crewed mission to Mars in 2024?
(a) USA
(b) China
(c) India
(d) Russia
Explanation: China's Tianwen-3 mission carried astronauts to Mars orbit for the first time in 2024.
#1963
Which African country experienced severe floods in 2024, leading to a humanitarian crisis?
(a) Somalia
(b) Sudan
(c) South Sudan
(d) Mozambique
Explanation: Devastating cyclones and floods in 2024 displaced hundreds of thousands in Mozambique.
#1964
Who won the 2024 Nobel Prize in Literature?
(a) Annie Ernaux
(b) Salman Rushdie
(c) Olga Tokarczuk
(d) Abdulrazak Gurnah
Explanation: Annie Ernaux was honored for her innovative exploration of memory, history, and personal experience.
#1965
Which country joined the European Union in 2024?
(a) Ukraine
(b) Moldova
(c) Georgia
(d) None of these
Explanation: No new member states acceded to the EU in 2024; accession talks continued but no formal entry occurred.
#1966
What is the output voltage of a step-up transformer? (CSS-2024)
(a) The output voltage is greater than the input voltage
(b) The output voltage is equal to the input voltage
(c) The output voltage is less than the input voltage
(d) None of these
Explanation: A step-up transformer increases voltage by having more turns in the secondary coil than the primary, as per transformer principles in standard physics texts (e.g., Halliday & Resnick).
#1967
The voltage signal which is generated by a microphone is called: (CSS-2024)
(a) Sound wave
(b) Transverse wave
(c) Audio signal
(d) None of these
Explanation: A microphone converts mechanical sound waves into an electrical audio signal, as confirmed by audio engineering references (e.g., “Fundamentals of Audio Engineering”).
#1968
The most common gas that is found in the air to breathe is called: (CSS-2024)
(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen
(d) None of these
Explanation: Nitrogen comprises ~78% of Earth’s atmosphere, compared to oxygen (~21%) and carbon dioxide (~0.04%), per atmospheric chemistry data (e.g., NOAA).
#1969
Electromagnetic radiation with maximum wavelength is: (CSS-2024)
(a) Radio waves
(b) Microwaves
(c) Infrared waves
(d) None of these
Explanation: Radio waves have the longest wavelengths (up to kilometers) in the electromagnetic spectrum, per physics texts (e.g., “University Physics” by Young & Freedman).
#1970
The most dangerous type of radiation is: (CSS-2024)
(a) Alpha radiation
(b) Beta radiation
(c) Gamma radiation
(d) None of these
Explanation: Gamma radiation is highly penetrating and energetic, causing significant cellular damage, unlike alpha (stopped by paper) or beta (stopped by skin), per radiation safety sources
#1971
The solar energy is radiated in the form of: (CSS-2024)
(a) Heat waves
(b) Light waves
(c) Electromagnetic waves
(d) None of these
Explanation: Solar energy includes visible light, infrared, and ultraviolet, all forms of electromagnetic waves, as per solar physics (e.g., NASA solar studies).
#1972
The study of human body cells is called: (CSS-2024)
(a) Physiology
(b) Anatomy
(c) Cytology
(d) None of these
Explanation: Cytology studies cell structure and function, distinct from physiology (body functions) and anatomy (body structures), per biology texts (e.g., Campbell Biology).
#1973
Excessive bleeding during an injury is a deficiency of: (CSS-2024)
(a) Vitamin K
(b) Vitamin C
(c) Vitamin B
(d) None of these
Explanation: Vitamin K is essential for blood clotting; its deficiency causes excessive bleeding, unlike Vitamin C (scurvy) or B (various deficiencies), per medical references (e.g., Merck Manual).
#1974
Which gas is used in gas welding? (CSS-2024)
(a) Hydrogen
(b) Oxygen
(c) Ethylene
(d) Acetylene
Explanation: Acetylene, mixed with oxygen, produces a high-temperature flame for gas welding, as per welding technology sources (e.g., AWS Welding Handbook).
#1975
Drum printers belong to which of the following category? (CSS-2024)
(a) Ink jet printer
(b) Laser printer
(c) Chain printer
(d) None of these
Explanation: Drum printers are impact printers, similar to chain printers, using rotating mechanisms, distinct from non-impact inkjet or laser printers, per computer history (e.g., “Computer Architecture” by Tanenbaum).
#1976
Machine learning is a sub area of: (CSS-2024)
(a) Hardware Engineering
(b) Artificial Intelligence
(c) Cyber Forensics
(d) None of these
Explanation: Machine learning is a subset of AI, focusing on data-driven algorithms, distinct from hardware engineering or cyber forensics, per AI texts (e.g., “Artificial Intelligence: A Modern Approach”).
#1977
Which of the following can be classified as renewable energy source? (CSS-2024)
(a) Solar energy
(b) Geothermal energy
(c) Tidal energy
(d) All of these
Explanation: Solar, geothermal, and tidal energy are naturally replenished, making them renewable, per energy science (e.g., IEA reports).
#1978
How do scientists know that the Earth’s core is made up of metal? (CSS-2024)
(a) The density of the surface layer of Earth is much less than its average density
(b) The Earth’s rotation speed indicates its core structure
(c) The density of surface layer of Earth is greater than its total density
(d) None of these
Explanation: Earth’s average density (~5.5 g/cm³) exceeds surface rock density (~2.7–3.0 g/cm³), indicating a dense metallic core, confirmed by seismic studies, per geophysics (e.g., “Earth” by Tarbuck).
#1979
Maintenance of soil fertility without addition of extra nutrition is due to: (CSS-2024)
(a) Microbial activity
(b) Crop residue
(c) Moisture
(d) None of these
Explanation: Soil microbes decompose organic matter, recycling nutrients to maintain fertility, more directly than crop residue or moisture, per soil science (e.g., “Soil Microbiology” by Tate).
#1980
Which of the following statement is true? (CSS-2024)
(a) Water-soluble vitamins cannot be stored in the body
(b) Fat-soluble vitamins can be stored in the body
(c) Body can absorb more of fat-soluble vitamins than required
(d) All of these
Explanation: Water-soluble vitamins (B, C) are excreted, fat-soluble vitamins (A, D, E, K) are stored, and excess fat-soluble vitamins can accumulate, per nutrition science (e.g., “Modern Nutrition” by Shils).