DCOA Mixed Practice Test #672

Question 1

Kerala Water Authority:‌​‍

Accepted Answer

KWA — KWA — govt water supply utility.‌​‍

Answer

KSWA

Answer

All

Answer

KWRA

Question 2

Cloning of Dolly the sheep (1996) was achieved by:‌​‍

Accepted Answer

Somatic cell nuclear transfer — Dolly was the first mammal cloned from an adult somatic cell (Ian Wilmut, Roslin Institute).‌​‍

Answer

Artificial insemination

Answer

Tissue culture

Answer

Gene therapy

Question 3

The Magna Carta (1215), a forerunner of constitutional government, was signed in:

Accepted Answer

England — King John of England signed the Magna Carta at Runnymede in 1215, limiting royal power.

Answer

France

Answer

Germany

Answer

Italy

Question 4

Latent heat of fusion of ice at 0°C is approximately:‌​‍

Accepted Answer

80 cal/g (334 J/g) — Fusion: 80 cal/g. Vaporisation of water at 100°C: 540 cal/g (2260 J/g).‌​‍

Answer

100 cal/g

Answer

1 cal/g

Answer

540 cal/g

Question 5

Photosynthesis produces:‌​‍

Accepted Answer

Glucose and O₂ — 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂ (in presence of sunlight).‌​‍

Answer

CO₂ and water

Answer

Starch only

Answer

Protein and fat

Question 6

First Malayalam prose writer:

Accepted Answer

Arnos Pathiri (1700s) — Arnos Pathiri — early Malayalam prose.

Answer

Ezhuthachan

Answer

CV Raman Pillai

Answer

Basheer

Question 7

HIV attacks:

Accepted Answer

WBCs (CD4 T cells) — Attacks CD4+ T cells, weakening immune system.

Answer

RBCs

Answer

Platelets

Answer

Neurons

Question 8

Light year is a unit of:‌​‍

Accepted Answer

Distance — Light year = distance light travels in one year (~9.46 × 10¹² km).‌​‍

Answer

Speed

Answer

Time

Answer

Mass

Question 9

Kerala's rivers are characterized by their relatively short length, high gradient, and rapid flow towards the Arabian Sea. Which of the following geographical factors is the primary reason for these distinct characteristics?

Accepted Answer

B. The close proximity of the steep western slopes of the Western Ghats to the narrow coastal plain. — The primary reason for the short length and rapid flow of Kerala's rivers is its unique physiography. The Western Ghats run parallel and very close to the Arabian Sea, creating a narrow strip of land with a steep gradient. Rivers originating from the Ghats thus have short courses and descend rapidly to the sea. While high rainfall contributes to flow volume, and laterite soil might affect runoff, these are not the fundamental reasons for the rivers' inherent short length and steep profile as dictated by the topography. Dam construction alters flow but not the natural geographical characteristi

Answer

A. The extensive laterite soil cover across the state, which accelerates surface runoff.

Answer

C. High annual rainfall throughout the year, leading to constant erosion and quick drainage.

Answer

D. The presence of numerous small reservoirs and check dams that fragment river courses.

Question 10

Largest freshwater lake:‌​‍

Accepted Answer

Sasthamkotta — Sasthamkotta Lake, Kollam.‌​‍

Answer

Vembanad

Answer

Ashtamudi

Answer

Periyar

DCOA Mixed Practice Test #672