KAS Prelims Mixed Practice Test #206

Question 1

Dehradun city is located in a:‌​‍

Accepted Answer

Dun — Dehradun lies in the Doon Valley (a 'dun') between Shiwaliks and Lesser Himalayas.‌​‍

Answer

Phumdi

Answer

Marg

Answer

Bugyal

Question 2

Largest island in world:‌​‍

Accepted Answer

Greenland — Greenland (2.16 million sq km).‌​‍

Answer

New Guinea

Answer

Borneo

Answer

Madagascar

Question 3

The gold foil (alpha-particle scattering) experiment established that an atom has:‌​‍

Accepted Answer

A dense positively-charged nucleus with mostly empty space around it — Rutherford's 1911 experiment disproved Thomson's model and proposed a nuclear atom.‌​‍

Answer

Only electrons

Answer

A uniform sphere of positive charge

Answer

A plum-pudding structure

Question 4

The Upanishads are part of:‌​‍

Accepted Answer

Vedic literature (philosophical concluding texts, c. 800-500 BCE) — Upanishads (Vedanta = end of Vedas) contain core Hindu philosophy: Atman-Brahman unity, karma, moksha. ‌​‍108 total, 13 principal.

Answer

Epics

Answer

Puranas

Answer

Dharmashastras

Question 5

Which of the following is/are Himalayan rivers that form gorges?

Accepted Answer

Indus, Ganga, and Brahmaputra all three — All three major Himalayan rivers cut antecedent gorges across the range.

Answer

Indus only

Answer

Ganga only

Answer

Brahmaputra only

Question 6

Synonym of IMPERIOUS:‌​‍

Accepted Answer

Domineering — Commanding.‌​‍

Answer

Kind

Answer

Humble

Answer

Weak

Question 7

'Under the weather' means:‌​‍

Accepted Answer

Unwell — Slightly ill.‌​‍

Answer

Cold

Answer

Raining

Answer

Happy

Question 8

To effectively prevent the transmission of microorganisms and reduce the incidence of healthcare-associated infections (HAIs) in a hospital setting, the most critical intervention for healthcare workers is:

Accepted Answer

B. Performing consistent and proper hand hygiene. — Consistent and proper hand hygiene (washing with soap and water or using alcohol-based hand rub) is universally recognized as the single most effective measure to prevent the spread of HAIs. While other options contribute to infection control, hand hygiene directly breaks the chain of infection from healthcare worker to patient.

Answer

A. Wearing sterile gloves for all patient contact.

Answer

C. Implementing strict visitor restriction policies.

Answer

D. Administering prophylactic antibiotics to high-risk patients.

Question 9

Which of the following scenarios best illustrates a controlled nuclear chain reaction, a principle crucial for sustainable energy production?

Accepted Answer

C. The continuous generation of electricity in a nuclear power plant reactor. — A nuclear power plant reactor utilizes control rods to absorb excess neutrons, thereby maintaining a sustained and controlled chain reaction that generates heat for electricity. An atomic bomb represents an uncontrolled chain reaction, leading to a massive, instantaneous energy release. Spontaneous decay is a natural radioactive process, not a chain reaction, and nuclear fusion is a distinct process where light nuclei combine.

Answer

A. The spontaneous decay of Uranium-238 into Thorium-234.

Answer

B. The rapid, uncontrolled release of energy in an atomic bomb explosion.

Answer

D. The fusion of hydrogen isotopes in the sun's core.

Question 10

Speed of sound in air at 20°C is approximately:‌​‍

Accepted Answer

343 m/s — v = √(γP/ρ) ≈ 331 + 0.6T (°C). In water ~1482 m/s; in steel ~5960 m/s.‌​‍

Answer

330 m/s

Answer

1500 m/s

Answer

450 m/s

KAS Prelims Mixed Practice Test #206