LGS Mixed Practice Test #137

Question 1

The instrument used to measure earthquakes is:‌​‍

Accepted Answer

Seismograph — Seismograph (seismometer) measures earthquake waves. ‌​‍Richter Scale measures earthquake magnitude.

Answer

Barometer

Answer

Anemometer

Answer

Hydrometer

Question 2

Price floor (minimum price) above equilibrium causes:‌​‍

Accepted Answer

Surplus — Price floor (e.g., minimum wage above market rate, agricultural MSP above market): supply > demand. ‌​‍MSP procurement by FCI creates food grain surplus/storage.

Answer

Shortage

Answer

No effect

Answer

Equilibrium

Question 3

Municipal Corporations:‌​‍

Accepted Answer

6 — 6 (TVM, Kochi, Kozhikode, Thrissur, Kollam, Kannur).‌​‍

Answer

4

Answer

5

Answer

7

Question 4

A microbiologist performs a Gram stain on a bacterial sample. The primary purpose of this staining technique in bacteriology is to:

Accepted Answer

B. Differentiate bacteria based on their cell wall composition. — Gram staining is a differential staining technique that classifies bacteria into two major groups, Gram-positive and Gram-negative, based on differences in their cell wall composition and structure. It does not determine motility, identify spores, or assess metabolic activity.

Answer

A. Determine the motility of bacteria.

Answer

C. Identify the presence of bacterial spores.

Answer

D. Assess the metabolic activity of bacteria.

Question 5

The Nelson cell and Castner-Kellner process are used to manufacture:‌​‍

Accepted Answer

NaOH and chlorine from brine — Chlor-alkali process: electrolysis of brine (NaCl solution) gives NaOH, Cl₂ and H₂.‌​‍

Answer

Copper

Answer

Iron

Answer

Aluminium

Question 6

Cosmopolitanism argues:‌​‍

Accepted Answer

All humans are citizens of a single world community — Cosmopolitanism (Kant, Nussbaum, Appiah) — moral obligations extend beyond nation to all humanity.‌​‍

Answer

Strong borders

Answer

Nation-state is primary

Answer

Cultural separation

Question 7

EWS reservation (10%) was introduced by:‌​‍

Accepted Answer

103rd Amendment — 103rd Amendment (2019) introduced 10% reservation for Economically Weaker Sections.‌​‍

Answer

99th Amendment

Answer

101st Amendment

Answer

104th Amendment

Question 8

Kerala gold smuggling case:

Accepted Answer

2020 — 2020 UAE consulate case.

Answer

2018

Answer

2022

Answer

2019

Question 9

Vaccines work by:‌​‍

Accepted Answer

Stimulating immune system to recognise pathogens (antibody memory) — Vaccines expose immune system to weakened/dead pathogens or antigens → protective memory response.‌​‍

Answer

Killing disease directly

Answer

Breaking bones

Answer

Providing nutrients

Question 10

Kerala's west-flowing rivers are crucial for the state's ecology and economy. However, their characteristics make them particularly vulnerable to certain environmental challenges. Which of the following is the most significant environmental challenge faced by these rivers due to their inherent nature?

Accepted Answer

B. High susceptibility to pollution from industrial and urban waste coupled with low dilution capacity during lean seasons. — Kerala's west-flowing rivers are relatively short, have steep gradients, and are predominantly monsoon-fed, leading to significant fluctuations in water volume. During the lean seasons, their reduced flow significantly lowers their dilution capacity, making them highly susceptible to pollution from the dense urban and industrial settlements along their banks. While hydroelectric potential exists due to steep gradients and salinization occurs in lower reaches, pollution due to low dilution is the most pervasive and significant challenge.

Answer

A. Limited potential for hydroelectric power generation due to their short length and steep gradient.

Answer

C. Excessive siltation and delta formation at their mouths, causing navigation difficulties for large vessels.

Answer

D. Rapid salinization of their upper reaches due to tidal ingress from the Arabian Sea throughout the year.

LGS Mixed Practice Test #137