DCOA Mixed Practice Test #204

Question 1

Fill in: 'Each of the boys ___ a book.'

Accepted Answer

has — 'Each' is singular → singular verb 'has'.

Answer

have

Answer

are

Answer

were

Question 2

Absolute zero is:

Accepted Answer

-273.15°C — -273.15°C or 0 Kelvin — lowest possible temperature.

Answer

-100°C

Answer

-373.15°C

Answer

0°C

Question 3

A person suffering from hypermetropia (farsightedness) uses corrective lenses. Which type of lens is typically prescribed, and where does the image of a nearby object form without correction?

Accepted Answer

C. Convex lens; image forms behind the retina. — Hypermetropia, or farsightedness, occurs when the eye's lens or cornea is unable to converge light sufficiently, causing light rays from nearby objects to focus at a point behind the retina. To correct this condition, a convex (converging) lens is prescribed. This lens helps to increase the convergence of light rays before they enter the eye, ensuring they focus correctly on the retina for clear vision.

Answer

A. Concave lens; image forms behind the retina.

Answer

B. Convex lens; image forms in front of the retina.

Answer

D. Concave lens; image forms in front of the retina.

Question 4

The 'Operation Shakti' nuclear tests at Pokhran were conducted in:‌​‍

Accepted Answer

1998 — Operation Shakti — 5 tests in May 1998 under PM Vajpayee.‌​‍

Answer

1992

Answer

2005

Answer

1974

Question 5

'Reaching families through women and reaching communities through families' is the slogan of:‌​‍

Accepted Answer

Kudumbashree — Kudumbashree's well-known guiding philosophy.‌​‍

Answer

Mahila Samriddhi Yojana

Answer

Indira Awaas Yojana

Answer

Bharat Nirman

Question 6

The process by which plants make food using sunlight is:

Accepted Answer

Photosynthesis — Photosynthesis: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂ (using sunlight and chlorophyll). Plants convert carbon dioxide and water into glucose and oxygen.

Answer

Respiration

Answer

Transpiration

Answer

Osmosis

Question 7

Totalitarianism differs from authoritarianism in:‌​‍

Accepted Answer

Totalitarian controls ALL aspects of life (ideology + society); authoritarian limits politics but tolerates private life — Hannah Arendt's 'The Origins of Totalitarianism' (1951) — totalitarianism extends state control into private sphere via ideology + terror.‌​‍

Answer

Authoritarian is economic only

Answer

No difference

Answer

Totalitarian is democratic

Question 8

Coelenterates (Cnidaria):‌​‍

Accepted Answer

Jellyfish, corals — Jellyfish, corals — stinging cells.‌​‍

Answer

Sponges

Answer

Fish

Answer

Starfish

Question 9

'Social institutions' in sociology include all of the following EXCEPT:‌​‍

Accepted Answer

Weather — Weather is a natural phenomenon; social institutions are societal frameworks (family, religion, education, etc.).‌​‍

Answer

Educational institutions

Answer

Religion

Answer

Family

Question 10

Respiration types:‌​‍

Accepted Answer

Aerobic, anaerobic — With or without oxygen.‌​‍

Answer

Only aerobic

Answer

Photosynthesis

Answer

Only anaerobic

DCOA Mixed Practice Test #204