Part-I MCQs: the 20 compulsory multiple-choice questions of the CSS 2020 General Science & Ability paper, with answers and short explanations.

FPSC has not published these MCQs, so they are taken from published transcriptions, and the wording may differ slightly from the original paper. Answers are by the CSS Nexus team, and are correct as of the exam year.

Answers

1. Which of the following is an unsaturated fat? (C) Vegetable oil.

2. The shape of our Milky Way Galaxy is: (A) Spiral.

3. Which vitamin is known as the 'blood clotting vitamin'? (C) Vitamin K.

4. Humidity is measured by: (B) Hygrometer.

5. Planets between Earth and the Sun are: (A) Mercury and Venus.

6. Electromagnetic radiation with higher energy than visible radiation is: (C) X-rays.

7. Aedes aegypti transmits: (B) Dengue fever.

8. The bond of H2O is: (C) Polar covalent.

9. Which organelle is called the powerhouse of the cell? (A) Mitochondria.

10. Which of the following is a p-type semiconductor? (B) Gallium (unconfirmed). Gallium is the acceptor dopant that makes p-type silicon or germanium.

11. In which atmospheric layer is the temperature about -90°C? (A) Mesosphere.

12. Which of the following is a non-sedimentary rock? (C) Granite.

13. Greenhouse gases absorb: (A) Infrared radiations.

14. ______ is information about physical working conditions, work schedule, and the organizational and social context of the job: (B) Job context.

15. The current recommended limit of arsenic in drinking water by WHO is: (A) 10 ug/L.

16. ______ is the primary consideration in designing knowledge-based AI systems: Not confirmed. No reliable source found.

17. Which of the following is not a basic step in creating a worksheet? Not confirmed. No reliable source found.

18. A set of programs that consists of a full set of documents is termed a: (C) Software package.

19. The size of a MAC address in a computer network is: (C) 48 bits.

20. What is a non-reducing sugar? (B) Sucrose.