DCOA Mixed Practice Test #720

Question 1

The pH of acid rain is typically:‌​‍

Accepted Answer

Below 5.6 — Normal rain pH ~5.6 (CO₂ dissolved); acid rain pH often 4–4.5 or lower.‌​‍

Answer

Exactly 7

Answer

Between 6 and 7

Answer

Above 7

Question 2

What is the full form of CPU?‌​‍

Accepted Answer

Central Processing Unit — CPU stands for Central Processing Unit. ‌​‍It is the 'brain' of the computer that performs arithmetic and logical operations.

Answer

Computer Personal Unit

Answer

Central Program Utility

Answer

Computer Processing Unit

Question 3

In adults, haemoglobin normal level (male) is approximately:‌​‍

Accepted Answer

13.5–17.5 g/dL — Normal adult male Hb: 13.5–17.5 g/dL; female: 12–15.5 g/dL.‌​‍

Answer

8–10 g/dL

Answer

11–13 g/dL

Answer

18–20 g/dL

Question 4

Meson was predicted by:‌​‍

Accepted Answer

Yukawa (to mediate strong force) — Pion discovered 1947. Nobel 1949. Range of nuclear force set by meson mass.‌​‍

Answer

Dirac

Answer

Bohr

Answer

Einstein

Question 5

Chordates include:

Accepted Answer

Fish, amphibians, reptiles, birds, mammals — All vertebrates are chordates.

Answer

Only vertebrates

Answer

Only mammals

Answer

Birds

Question 6

The Guruvayur Satyagraha began on:‌​‍

Accepted Answer

1 November 1931 — Launched 1 November 1931 under K. Kelappan and Mannath Padmanabhan.‌​‍

Answer

17 November 1942

Answer

12 November 1936

Answer

30 March 1924

Question 7

Ezhuthachan called:‌​‍

Accepted Answer

Father of Malayalam language — Thunchath Ezhuthachan — father of Malayalam language.‌​‍

Answer

Father of Kerala

Answer

First poet

Answer

Father of Malayalam cinema

Question 8

Which of the following is a key component of health education aimed at preventing non-communicable diseases like hypertension and diabetes?

Accepted Answer

B. Encouraging regular physical activity and balanced diet — Regular physical activity and a balanced diet are cornerstones of preventing non-communicable diseases like hypertension and diabetes. While vaccination and deworming are important, they target communicable diseases. Antibiotics are not relevant to chronic disease prevention. Distractors are plausible due to their public health significance.

Answer

A. Promoting routine vaccination

Answer

C. Providing antibiotics for infections

Answer

D. Conducting mass deworming programs

Question 9

The Kochi Rajya Praja Mandal was formed in 1941 demanding:‌​‍

Accepted Answer

Responsible government — Praja Mandal led by Ikkanda Warrier, Panampilly Govinda Menon and V.R. ‌​‍Krishnan Ezhuthachan fought for responsible government.

Answer

Land reform

Answer

Temple entry

Answer

Linguistic reorganization

Question 10

Vegetative propagation in Bryophyllum:‌​‍

Accepted Answer

Leaf margins (adventitious buds) — Adventitious buds on leaf margins grow into plantlets. ‌​‍Potato: tubers. Ginger: rhizomes. ‌​‍Sugarcane: cuttings.

Answer

Stems

Answer

Roots

Answer

Seeds

DCOA Mixed Practice Test #720