DCOA Mixed Practice Test #169

Question 1

Van der Waals equation corrects ideal gas law for:‌​‍

Accepted Answer

Intermolecular forces and finite molecular volume — (P + a/V²)(V - b) = RT. 'a' for attraction, 'b' for volume.‌​‍

Answer

Volume only

Answer

Temperature

Answer

Pressure of light

Question 2

IQ = (MA/CA) × 100 was defined by:‌​‍

Accepted Answer

Stern (William Stern, 1912) — MA = mental age (from Binet-Simon test). ‌​‍CA = chronological age. Modern IQ uses standard scores (mean 100, SD 15).

Answer

Binet

Answer

Spearman

Answer

Gardner

Question 3

The People's Plan Campaign (PPC) in Kerala, initiated in 1996, is considered a landmark in the state's development journey. What was its most significant contribution to the Kerala Model?

Accepted Answer

C. It significantly strengthened local self-governance by devolving substantial planning and financial powers to Panchayati Raj Institutions, promoting participatory development. — The People's Plan Campaign (PPC) was a groundbreaking initiative aimed at decentralizing planning and empowering local self-governing institutions (Panchayati Raj Institutions) in Kerala. Its primary contribution was to devolve substantial planning and financial powers to the local bodies, fostering participatory development by enabling citizens to directly engage in decision-making and resource allocation for local projects. The other options describe objectives contrary to or not central to the PPC's core mission of democratic decentralization.

Answer

A. It ushered in an era of rapid industrialization by attracting substantial foreign direct investment.

Answer

B. It centralized fiscal powers with the state government to streamline economic planning and reduce local autonomy.

Answer

D. It primarily aimed at modernizing the agricultural sector through large-scale corporate farming and export promotion.

Question 4

Area under a velocity-time graph represents:‌​‍

Accepted Answer

Displacement — ∫v dt = displacement. Slope of v-t graph = acceleration.‌​‍

Answer

Momentum

Answer

Jerk

Answer

Acceleration

Question 5

The SI unit of time is:‌​‍

Accepted Answer

Second — Second (s) — defined by 9,192,631,770 periods of radiation of Cs-133.‌​‍

Answer

Hour

Answer

Minute

Answer

Day

Question 6

Which branch of the autonomic nervous system is primarily responsible for the "rest and digest" responses, such as slowing heart rate and increasing digestion?

Accepted Answer

C. Parasympathetic Nervous System — The Parasympathetic Nervous System conserves energy and promotes "rest and digest" functions, leading to decreased heart rate, increased digestive activity, and pupil constriction. In contrast, the Sympathetic Nervous System governs "fight or flight" responses.

Answer

A. Somatic Nervous System

Answer

B. Sympathetic Nervous System

Answer

D. Central Nervous System

Question 7

On which river is the Peringalkuthu Dam located?‌​‍

Accepted Answer

Chalakudy — Chalakudy River, Thrissur.

Answer

Periyar

Answer

Pamba

Answer

Bharathapuzha

Question 8

Soap works by:‌​‍

Accepted Answer

Having hydrophilic and hydrophobic ends, emulsifying dirt — Soap molecules have polar (water-loving) head and non-polar (oil-loving) tail — form micelles around dirt.‌​‍

Answer

Bleaching

Answer

Sharpening

Answer

Killing bacteria only

Question 9

NITI Aayog CEO currently (2024-26):‌​‍

Accepted Answer

B.V.R. Subrahmanyam — B.V.R. Subrahmanyam — CEO since Feb 2023.‌​‍

Answer

Rajiv Kumar

Answer

Arvind Panagariya

Answer

Amitabh Kant

Question 10

Caste system is a form of:

Accepted Answer

Closed stratification (birth-based) — Caste = closed, ascribed status by birth, endogamy, hereditary occupation, hierarchy based on purity/pollution. Unique to Indian subcontinent.

Answer

Open stratification

Answer

Class

Answer

Meritocracy

DCOA Mixed Practice Test #169