LDC Mixed Practice Test #804

Question 1

Minimum voting age:

Accepted Answer

18 — 18 years — reduced from 21 by 61st Amendment (1989).

Answer

16

Answer

20

Answer

21

Question 2

'The scissors ___ sharp':

Accepted Answer

are — Scissors — plural verb.

Answer

is

Answer

was

Answer

be

Question 3

An adolescent is known for making impulsive decisions and engaging in risky behaviors without fully considering the long-term consequences. From a neurodevelopmental perspective, this tendency is often attributed to the continued maturation of which part of the brain during adolescence?

Accepted Answer

C. Prefrontal cortex — The prefrontal cortex, responsible for executive functions like planning, impulse control, and risk assessment, undergoes significant maturation throughout adolescence, making teenagers more prone to impulsive and risky behaviors before it is fully developed. While the amygdala is involved in emotions, its *full maturation* is not the primary reason for this characteristic impulsivity.

Answer

A. Cerebellum

Answer

B. Brainstem

Answer

D. Amygdala (fully mature)

Question 4

Which of the following are wetlands of international importance in India?‌​‍

Accepted Answer

Chilika Lake, Keoladeo, Sundarbans, Wular, Vembanad, etc. (Ramsar sites) — India has 75+ Ramsar sites. ‌​‍Chilika largest brackish lake in Asia. Keoladeo Ghana (Bharatpur) famous bird sanctuary.

Answer

Kerala backwaters

Answer

Only coast

Answer

Just rivers

Question 5

Which item is in the Concurrent List of the Seventh Schedule?‌​‍

Accepted Answer

Social security and social insurance — Social security/social insurance is Concurrent List, Entry 23.‌​‍

Answer

Public health and sanitation

Answer

Posts and telegraph

Answer

Police

Question 6

The National Education Policy (NEP) 2020 proposes a new 5+3+3+4 curricular and pedagogical structure. Which of the following accurately represents the stages in this new structure?

Accepted Answer

A. Foundational, Preparatory, Middle, Secondary — The NEP 2020 introduces a 5+3+3+4 structure corresponding to the Foundational (3-8 years), Preparatory (8-11 years), Middle (11-14 years), and Secondary (14-18 years) stages. This new structure replaces the earlier 10+2 system, aiming for a more holistic and integrated learning approach from early childhood. Options B, C, and D use incorrect or outdated terminology for the stages as defined by NEP 2020.

Answer

B. Early Childhood, Primary, Upper Primary, High School

Answer

C. Pre-primary, Primary, Middle, Senior Secondary

Answer

D. Foundational, Elementary, Secondary, Higher Secondary

Question 7

Efficiency of Carnot engine operating between T1 (hot) and T2 (cold) is:‌​‍

Accepted Answer

1 - T2/T1 — Maximum possible efficiency. Approaches 1 only if T2 → 0 K (unattainable).‌​‍

Answer

T2/T1

Answer

T1/T2

Answer

1 - T1/T2

Question 8

Area under curve y = f(x) from a to b:‌​‍

Accepted Answer

∫ₐᵇ f(x) dx — Fundamental theorem of calculus. Net signed area (above - below x-axis).‌​‍

Answer

Sum

Answer

f(b) - f(a)

Answer

f'(b) - f'(a)

Question 9

In a science lesson following the 5E instructional model, students are given various materials to conduct experiments, observe phenomena, and collect data without direct instruction from the teacher on the expected outcomes. Which stage of the 5E model are the students primarily engaged in?

Accepted Answer

B. Explore — The Explore stage is characterized by students directly interacting with materials and phenomena through hands-on activities, investigations, and data collection. They work together, develop hypotheses, and test predictions, building their own understanding. Engage aims to capture interest, Explain focuses on formal concepts, and Elaborate applies learning to new contexts.

Answer

A. Engage

Answer

C. Explain

Answer

D. Elaborate

Question 10

If CAT=24, DOG=?‌​‍

Accepted Answer

26 — 3+1+20=24; 4+15+7=26.‌​‍

Answer

20

Answer

28

Answer

30

LDC Mixed Practice Test #804