DCOA Mixed Practice Test #272

Question 1

India's population ranking in the world (2023 figures) is:‌​‍

Accepted Answer

1st — India overtook China in mid-2023 to become the most populous country.‌​‍

Answer

3rd

Answer

4th

Answer

2nd

Question 2

Oxygenated blood is transported from the lungs back to the heart through which of the following blood vessels?

Accepted Answer

C. Pulmonary vein — The pulmonary vein is unique as it carries oxygenated blood from the lungs to the left atrium of the heart. The pulmonary artery carries deoxygenated blood from the heart to the lungs, the aorta distributes oxygenated blood from the heart to the rest of the body, and the superior vena cava brings deoxygenated blood from the upper body back to the heart.

Answer

A. Pulmonary artery

Answer

B. Aorta

Answer

D. Superior vena cava

Question 3

Polymer used in non-stick coating:‌​‍

Accepted Answer

Teflon (PTFE) — Teflon (Polytetrafluoroethylene) — non-stick, heat resistant.‌​‍

Answer

Polythene

Answer

Nylon

Answer

PVC

Question 4

How many districts are there in Kerala?‌​‍

Accepted Answer

14 — Kerala has 14 districts, from Kasaragod in the north to Thiruvananthapuram in the south.‌​‍

Answer

15

Answer

13

Answer

12

Question 5

Palakkad Gap is in:‌​‍

Accepted Answer

Western Ghats — Only significant break in Western Ghats.‌​‍

Answer

Eastern Ghats

Answer

Himalayas

Answer

Vindhyas

Question 6

Polaroid absorbs:

Accepted Answer

Light polarised perpendicular to transmission axis — Malus's law: I = I₀ cos²θ. Natural light is unpolarised; Polaroid makes it 50% intensity, linearly polarised.

Answer

All light

Answer

Only red

Answer

Only UV

Question 7

Obedience to authority — Milgram experiment:‌​‍

Accepted Answer

~65% administered lethal shocks under instruction — Shocked by post-Holocaust context. ‌​‍Stanley Milgram (Yale, 1963). Ethics controversial.

Answer

Low

Answer

Harmless

Answer

Unknown

Question 8

A leading pharmacologist from Kerala is being felicitated for his exemplary contributions to drug discovery and development, particularly for a novel treatment for a rare disease. Which of the following prestigious national awards is most appropriately conferred upon him for his significant achievements in the medical field?

Accepted Answer

B. Dr. B.C. Roy Award — The Dr. B.C. Roy Award is a prestigious national award in India, presented by the Medical Council of India for outstanding contributions in the field of medicine. It specifically recognizes exemplary work in various branches of medicine. The other options are for sports (Arjuna, Dronacharya) and literature (Jnanpith), making them inappropriate for contributions to drug discovery and medical science.

Answer

A. Arjuna Award

Answer

C. Dronacharya Award

Answer

D. Jnanpith Award

Question 9

A 35-year-old mother delivers a term baby weighing 2.8 kg via vaginal delivery. The baby is noted to have a single transverse crease across the palm, hypotonia, and a protruding tongue. Which of the following congenital conditions is MOST likely?

Accepted Answer

A. Congenital hypothyroidism — The clinical features (single transverse palmar crease, hypotonia, protruding tongue) are classic for congenital hypothyroidism, which requires immediate thyroid function tests and levothyroxine therapy to prevent intellectual disability. Down syndrome typically presents with upslanting palpebral fissures, flat nasal bridge, and hypotonia but not necessarily a single palmar crease. Turner and Fragile X syndromes have distinct phenotypic features not described here.

Answer

B. Down syndrome

Answer

C. Turner syndrome

Answer

D. Fragile X syndrome

Question 10

Faraday's law of electromagnetic induction:‌​‍

Accepted Answer

EMF induced = -dΦ/dt — Negative sign = Lenz's law. Flux Φ = B·A cos θ. Unit: weber.‌​‍

Answer

EMF = BIL

Answer

EMF = qV

Answer

EMF = V/R

DCOA Mixed Practice Test #272