Part-I MCQs: the 20 compulsory multiple-choice questions of the CSS 2019 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. Blood contains: (D) All of these.

2. Permanent hardness of water is due to the presence of: (C) Calcium sulphate.

3. H+ is yielded by: (A) Acids.

4. The number of bones in the human body is: (D) 206.

5. The unavailability of internal energy for conversion into mechanical work is called: (A) Entropy.

6. Which vessel provides blood to the liver? (A) Hepatic portal artery (unconfirmed). The liver gets blood from the hepatic portal vein and the hepatic artery.

7. A bronze medal is made up of which metals? (B) Copper, tin.

8. What is not included in the Earth's environment? (D) None of these. Lithosphere, atmosphere (including the stratosphere) and biosphere are all part of it.

9. The loudness of sound depends on its: (C) Amplitude.

10. Control rods of which element are used in a nuclear reactor? (A) Cadmium. Boron is also used.

11. Which country lies on the equator? (A) Kenya.

12. What is anthracite? (B) Hard coal.

13. How many bits are required to store the hexadecimal word AF? (C) 8 bits. Two hexadecimal digits of 4 bits each.

14. What is pre-released software's version? (A) Beta (unconfirmed). Beta is the public pre-release; alpha comes earlier.

15. What organelles do plant cells have? (C) Both A and B.

16. What is the protein metabolism waste in humans? (A) Urea.

17. Light year is a unit of: (B) Distance.

18. The macronutrients of plants are: (D) All of these.

19. Atomic number is also called: (A) Proton number.

20. Which of the following is an example of a warm-blooded animal? (B) Dolphin.