DCOA Mixed Practice Test #512

Question 1

Kerala's first woman IPS batch:

Accepted Answer

1970s — Various — joined in 1970s onward.

Answer

1990s

Answer

2000s

Answer

1960s

Question 2

Semicircular canals:‌​‍

Accepted Answer

Balance — Equilibrium in inner ear.‌​‍

Answer

Smell

Answer

Sight

Answer

Hearing

Question 3

The smallest state (country) in the world is:‌​‍

Accepted Answer

Vatican City — Vatican City (0.49 km²) is the world's smallest sovereign state.‌​‍

Answer

Cuba

Answer

Russia

Answer

Sri Lanka

Question 4

Calculate the work done on a body of mass 20 kg for lifting it 2 meters above the ground (g=9.8 m/s²).‌​‍

Accepted Answer

392 Joule — W = mgh = 20×9.8×2 = 392 J.‌​‍

Answer

19.6 Joule

Answer

98 Joule

Answer

196 Joule

Question 5

p-n junction diode conducts in:

Accepted Answer

Forward bias only — Depletion region shrinks in forward bias. Used as rectifier. Reverse breakdown (Zener) at high reverse voltage.

Answer

Both directions equally

Answer

Reverse bias only

Answer

Never

Question 6

A nation aiming for energy security and reduced carbon emissions is evaluating nuclear fission power. Considering the unique characteristics of this energy source, which of the following presents the most critical long-term environmental and safety challenge?

Accepted Answer

C. The safe and permanent disposal of highly radioactive spent nuclear fuel and waste products. — Option C correctly identifies the most critical long-term environmental and safety challenge associated with nuclear fission power: the management of highly radioactive waste, which remains dangerous for thousands of years. Option A describes a safety concern, but modern reactor designs incorporate multiple safety layers to prevent uncontrolled chain reactions. Option B is incorrect as nuclear power plants produce minimal greenhouse gases during operation. Option D describes conditions more typical for nuclear fusion, not fission reactors.

Answer

A. The constant risk of an uncontrolled chain reaction leading to widespread radiation release.

Answer

B. The substantial emission of greenhouse gases during the routine operation of the power plant.

Answer

D. The requirement for extremely high temperatures and pressures, making reactor containment difficult and costly.

Question 7

A school counselor notices that a bright student, who consistently performs well academically, has recently become withdrawn, anxious, and expresses feelings of worthlessness despite good grades. According to Maslow's Hierarchy, which needs are most likely unmet for this student, impacting their well-being?

Accepted Answer

C. Esteem needs — Given the student's consistent academic performance, their physiological and safety needs are likely met. The feelings of worthlessness, anxiety, and withdrawal, despite academic success, strongly suggest unmet esteem needs. These needs involve feelings of accomplishment, recognition, respect from others, and self-respect. While self-actualization is the highest level, esteem needs directly precede it and are more directly related to the described emotional distress.

Answer

A. Physiological needs

Answer

B. Safety needs

Answer

D. Self-actualization needs

Question 8

Kudumbashree launched:‌​‍

Accepted Answer

1998 — 17 May 1998.‌​‍

Answer

1996

Answer

2000

Answer

2002

Question 9

The Intergovernmental Panel on Climate Change (IPCC) is primarily responsible for which of the following?

Accepted Answer

C. Assessing and synthesizing scientific information on climate change for policymakers — The IPCC's role is to assess and synthesize scientific, technical, and socio-economic information relevant to climate change, its impacts, and potential response strategies for policymakers. It does not implement policies (A), conduct independent research (B), or fund projects (D).

Answer

A. Implementing global climate policies and mitigation strategies

Answer

B. Conducting independent scientific research on climate change

Answer

D. Funding renewable energy projects worldwide

Question 10

Brahmananda Swami Sivayogi's Siddhashram is situated at:‌​‍

Accepted Answer

Alathur — Sivayogi founded Siddhashram at Alathur, Palakkad (1903).‌​‍

Answer

Aluva

Answer

Kalady

Answer

Sivagiri

DCOA Mixed Practice Test #512