LDC Mixed Practice Test #338

Question 1

A high school science teacher wants to improve student participation in classroom discussions. She decides to conduct action research. After identifying the problem and reviewing relevant literature, what is the crucial next step in the action research cycle?

Accepted Answer

C. Collecting baseline data on current student participation levels and identifying contributing factors. — In the action research cycle (Plan-Act-Observe-Reflect), after identifying the problem, the 'Plan' stage involves understanding the current situation. Collecting baseline data is essential to accurately define the problem, measure its extent, and later evaluate the impact of any intervention. Implementing a strategy without baseline data (A) or just formulating a hypothesis (B) skips this crucial observational step. Presenting to administration (D) is an administrative step, not a core research cycle step.

Answer

A. Immediately implementing a new discussion strategy to see if it works.

Answer

B. Formulating a hypothesis about the causes of low participation and designing an intervention.

Answer

D. Presenting the problem to the school administration for their approval and support.

Question 2

During gas exchange in the lungs, oxygen moves from the alveoli into the pulmonary capillaries primarily due to which of the following principles?

Accepted Answer

C. Diffusion down its partial pressure gradient. — Gas exchange in the lungs, including the movement of oxygen from alveoli to capillaries, occurs primarily by simple diffusion. This process is driven by the difference in the partial pressure of oxygen between the alveoli (higher) and the pulmonary capillaries (lower). Active transport and facilitated diffusion are typically for solutes, and osmosis is for water movement.

Answer

A. Active transport against a concentration gradient.

Answer

B. Facilitated diffusion through protein channels.

Answer

D. Osmosis across the alveolar-capillary membrane.

Question 3

Republic Day 2024 chief guest:‌​‍

Accepted Answer

Macron — President Emmanuel Macron.‌​‍

Answer

Modi

Answer

Biden

Answer

Putin

Question 4

Creamy layer concept:‌​‍

Accepted Answer

Rich OBCs above income threshold excluded from reservation — Current threshold ₹8 lakh/year. ‌​‍SC/ST do not have creamy layer (2018 SC ruling allows for promotions). Latest debates ongoing.

Answer

No such rule

Answer

Apply to all

Answer

Only for SC/ST

Question 5

Gauss's law: ∮E·dA = ?‌​‍

Accepted Answer

q/ε₀ (enclosed charge) — Total flux through closed surface depends only on enclosed charge. ‌​‍Useful for symmetric geometries.

Answer

qε₀

Answer

q

Answer

E·r²

Question 6

1, 4, 9, 16, 25, ?‌​‍

Accepted Answer

36 — Perfect squares: 1²,2²,3²,4²,5²,6²=36.‌​‍

Answer

49

Answer

35

Answer

30

Question 7

A community health assessment reveals that a particular slum area has significantly higher rates of malnutrition, infectious diseases, and lower immunization coverage compared to affluent neighborhoods in the same city. Which primary social determinant of health is most likely contributing to these observed disparities?

Accepted Answer

C. Socioeconomic status (Poverty) — Socioeconomic status, particularly poverty, is a fundamental social determinant of health that profoundly impacts health outcomes. In slum areas, poverty often leads to inadequate housing, poor sanitation, limited access to nutritious food, and reduced educational opportunities, all of which contribute to higher rates of malnutrition, infectious diseases, and lower immunization coverage. While lifestyle choices and access to technology play a role, poverty is the overarching factor creating these disparities.

Answer

A. Genetic predisposition

Answer

B. Lifestyle choices

Answer

D. Access to advanced medical technology

Question 8

The first Secretary-General of the UN was:

Accepted Answer

Trygve Lie — Trygve Lie of Norway served as the first UN Secretary-General (1946–1952).

Answer

U Thant

Answer

Dag Hammarskjöld

Answer

Kofi Annan

Question 9

PM Awas Yojana 2.0 target:‌​‍

Accepted Answer

3 crore houses — PMAY 2.0 targets 3 crore additional houses.‌​‍

Answer

5 crore houses

Answer

1 crore houses

Answer

2 crore houses

Question 10

Strait of Hormuz between:‌​‍

Accepted Answer

Both A and C — Both descriptions apply.‌​‍

Answer

UAE and Iran

Answer

Persian Gulf and Arabian Sea

Answer

Iran and Oman

LDC Mixed Practice Test #338