DCOA Mixed Practice Test #718

Question 1

AC stands for:‌​‍

Accepted Answer

Alternating Current — AC = Alternating Current; polarity reverses periodically (50 Hz in India).‌​‍

Answer

Amplitude Current

Answer

Absolute Current

Answer

Actual Current

Question 2

G20 comprises approximately:‌​‍

Accepted Answer

19 nations + European Union — G20 = 19 major economies + EU. ‌​‍Now includes African Union (2023). India hosted G20 Summit 2023 (New Delhi, September).

Answer

50 nations

Answer

10 nations

Answer

20 member nations

Question 3

IPCC reports frequently highlight 'tipping points' in the Earth's climate system. Which of the following best describes the primary concern associated with reaching such a tipping point?

Accepted Answer

B. Irreversible and abrupt changes to the climate system with profound global consequences. — Tipping points refer to critical thresholds beyond which a natural system can undergo rapid and often irreversible changes, leading to significant global consequences. The primary concern is that crossing these thresholds could fundamentally alter climate patterns and ecosystems, rather than leading to a cessation of warming or temporary shifts. While geoengineering is a potential response, it is not the primary concern itself.

Answer

A. The immediate cessation of all global warming trends.

Answer

C. A temporary increase in global temperatures followed by a rapid return to pre-industrial levels.

Answer

D. Enhanced opportunities for geoengineering solutions to reverse climate change effects.

Question 4

Kerala's first railway station:‌​‍

Accepted Answer

Tirur (1861) — Beypore-Tirur line first.‌​‍

Answer

Palakkad

Answer

Kochi

Answer

Thiruvananthapuram

Question 5

Zwitterion form of amino acid has:‌​‍

Accepted Answer

Positive amino (+NH₃) and negative carboxyl (-COO⁻) — Net zero charge at isoelectric point (pI). Amino acids are amphoteric.‌​‍

Answer

No charge

Answer

Both positive

Answer

Both negative

Question 6

The Shanti Swarup Bhatnagar Prize, awarded by the Council of Scientific and Industrial Research (CSIR), recognizes outstanding contributions to science and technology in India. Research leading to significant advancements in understanding human disease mechanisms and developing new therapeutic strategies would primarily fall under which of the following prize categories?

Accepted Answer

B. Medical Sciences — The Shanti Swarup Bhatnagar Prize has a specific category for 'Medical Sciences' (Option B) designed to recognize research that makes significant advancements in understanding human disease mechanisms and developing new therapeutic strategies. While Chemical Sciences (A) or Engineering Sciences (C) might contribute to aspects of drug development, the primary recognition for direct medical breakthroughs is within the Medical Sciences category. Physical Sciences (D) is less directly relevant to disease mechanisms and therapeutic strategies.

Answer

A. Chemical Sciences

Answer

C. Engineering Sciences

Answer

D. Physical Sciences

Question 7

Who was the Brand Ambassador of 'Make in Kerala' programme?

Accepted Answer

Mohanlal — Mohanlal was Brand Ambassador for 'Make in Kerala'.

Answer

Mammootty

Answer

Suresh Gopi

Answer

Dileep

Question 8

Ultrasound frequencies are:‌​‍

Accepted Answer

Above 20 kHz — Ultrasound >20,000 Hz — inaudible to humans; used in medicine, SONAR, cleaning.‌​‍

Answer

Above 1 GHz only

Answer

Between 20 Hz and 20,000 Hz

Answer

Below 20 Hz

Question 9

Kerala assembly term:

Accepted Answer

5 years — 5 years — same as other states.

Answer

4 years

Answer

6 years

Answer

7 years

Question 10

Longest river in Europe:

Accepted Answer

Volga — Volga.

Answer

Danube

Answer

Rhine

Answer

Seine

DCOA Mixed Practice Test #718