April 2024 Edition
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April 2024 Current Affairs MCQs & Solutions
Top national & international current affairs questions for CSS, PMS, FPSC, PPSC, and NTS screening tests.
#3581
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: Duplicate of Q2. Microphones convert sound to electrical audio signals (audio engineering sources).
#3582
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: Duplicate of Q3. Nitrogen (~78%) is the most abundant atmospheric gas (NOAA).
#3583
Electromagnetic radiation with maximum wavelength is: (CSS-2024)
(a) Radio waves
(b) Microwaves
(c) Infrared waves
(d) None of these
Explanation: Duplicate of Q4. Radio waves have the longest wavelengths (Young & Freedman).
#3584
The most dangerous type of radiation is: (CSS-2024)
(a) Alpha radiation
(b) Beta radiation
(c) Gamma radiation
(d) None of these
Explanation: Duplicate of Q5. Gamma radiation is highly penetrating (IAEA).
#3585
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: Duplicate of Q6. Solar energy includes electromagnetic waves (NASA).
#3586
The study of human body cells is called: (CSS-2024)
(a) Physiology
(b) Anatomy
(c) Cytology
(d) None of these
Explanation: Duplicate of Q7. Cytology studies cells (Campbell Biology).
#3587
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: Duplicate of Q8. Vitamin K aids clotting (Merck Manual).
#3588
Which gas is used in gas welding? (CSS-2024)
(a) Hydrogen
(b) Oxygen
(c) Ethylene
(d) Acetylene
Explanation: Duplicate of Q9. Acetylene produces a high-temperature flame (AWS).
#3589
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: Duplicate of Q10. Drum printers are impact printers (Tanenbaum).
#3590
Machine learning is a sub area of: (CSS-2024)
(a) Hardware Engineering
(b) Artificial Intelligence
(c) Cyber Forensics
(d) None of these
Explanation: Duplicate of Q11. Machine learning is a subset of AI (Russell & Norvig).
#3591
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: Duplicate of Q12. All are renewable (IEA).
#3592
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: Duplicate of Q13. High density indicates a metallic core (Tarbuck).
#3593
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: Duplicate of Q14. Microbes recycle nutrients (Tate).
#3594
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: Duplicate of Q16. All statements are correct (Shils).
#3595
The shortest war in history lasted for how many minutes? (CSS-2024)
(a) 38
(b) 48
(c) 58
(d) None of these
Explanation: The Anglo-Zanzibar War (1896) lasted 38 minutes, per historical records (Guinness World Records).
#3596
The AIIB (Asian Infrastructure Investment Bank) was established by: (CSS-2024)
(a) China
(b) Japan
(c) India
(d) None of these
Explanation: Duplicate of Q22. Initiated by China in 2015 (AIIB).
#3597
What does the “I2-U2” alliance stand for? (CSS-2024)
(a) Turkey-Israel-Ukraine-UK
(b) US-UK-Ukraine-UAE
(c) North America
(d) None of these
Explanation: Duplicate of Q23. I2-U2 is India, Israel, UAE, US (Indian Ministry).
#3598
What does “CARICOM” stand for? (CSS-2024)
(a) Caribbean Community
(b) Canada, Australia, Romania, India Community
(c) Canada, Argentina, Russia, Italy Community
(d) None of these
Explanation: Duplicate of Q24. CARICOM is a Caribbean organization (CARICOM website).
#3599
Which country hosted the 14th BRICS summit in 2022? (CSS-2024)
(a) Brazil
(b) Russia
(c) China
(d) None of these
Explanation: China hosted the 14th BRICS summit virtually in 2022, per BRICS official records.
#3600
The “Global Security Initiative” was proposed by which country in 2022? (CSS2024)
(a) United States
(b) China
(c) Russia
(d) None of these
Explanation: China proposed the Global Security Initiative in 2022 to promote global peace, per Chinese Foreign Ministry statements.