LGS Mixed Practice Test #474

Question 1

A worker pushes a heavy crate across a horizontal floor at a constant speed. The worker applies a constant force 'F' over a distance 'd'. Which of the following statements accurately describes the energy transformations and work done in this scenario?

Accepted Answer

B. The work done by the worker is Fd, and the work done by friction converts mechanical energy into heat. — Since the crate moves at a constant speed, its kinetic energy remains unchanged, meaning the net work done on it is zero according to the Work-Energy Theorem. The worker does positive work (Fd), and this work is entirely balanced by the negative work done by friction (-Fd), which converts the mechanical energy into thermal energy (heat). Therefore, option B is correct. Option A is incorrect because net work is zero and kinetic energy is constant. Option C is incorrect because mechanical energy is not conserved due to the presence of friction. Option D is incorrect because the work done is diss

Answer

A. The net work done on the crate is Fd, and its kinetic energy increases.

Answer

C. The total mechanical energy of the crate remains constant, as it moves at a constant speed.

Answer

D. The work done by the worker is entirely converted into the kinetic energy of the crate.

Question 2

Which of the following enzymes is commonly measured in serum to assess liver function in a patient with suspected hepatitis?

Accepted Answer

B. Alanine aminotransferase (ALT) — Alanine aminotransferase (ALT) is a liver-specific enzyme released into the bloodstream during liver damage or inflammation (e.g., hepatitis). Amylase (A) and lipase (D) are pancreatic enzymes; creatine kinase (C) is muscle-related. ALT is the gold standard for liver function assessment.

Answer

A. Amylase

Answer

C. Creatine kinase (CK)

Answer

D. Lipase

Question 3

The Kerala Agrarian Relations Bill, 1957, despite being a landmark legislative attempt, did not achieve immediate widespread implementation in its original form. What was the primary reason for this delay and subsequent re-enactment?

Accepted Answer

C. Constitutional challenges and a presidential intervention led to its eventual striking down and subsequent re-enactment in a modified form. — The Kerala Agrarian Relations Bill, 1957, was initially struck down following constitutional challenges and a presidential intervention, which necessitated its re-enactment as the Kerala Agrarian Relations Act, 1960. This legal and political hurdle was the primary reason for its delayed implementation in its original form. Options A, B, and D do not accurately reflect the main reason for the bill's initial failure to be implemented.

Answer

A. Lack of political will from the ruling government to enforce its provisions against powerful vested interests.

Answer

B. Widespread peasant revolts and tenant protests against the bill's perceived inadequacies.

Answer

D. The severe financial crisis in Kerala made it impossible to fund the compensation required for land acquisition.

Question 4

Kozhikode historical importance:

Accepted Answer

Vasco da Gama landing — 1498. Spice trade hub.

Answer

Capital of Kerala

Answer

British headquarters

Answer

Dutch capital

Question 5

First Chief Minister of Kerala (after state formation on 1 Nov 1956):‌​‍

Accepted Answer

E.M.S. Namboodiripad — E.M.S. ‌​‍Namboodiripad (CPI, 5 Apr 1957 – 31 Jul 1959) was Kerala's first CM after the state was formed on 1 November 1956. Pattom A. ‌​‍Thanu Pillai was CM of Travancore-Cochin (pre-Kerala) and later became Kerala's 3rd CM (1960–1962).

Answer

Pattom A. Thanu Pillai

Answer

R. Sankar

Answer

C. Achutha Menon

Question 6

Which was Kerala's first Malayalam newspaper?‌​‍

Accepted Answer

Rajyasamacharam (1847, by Hermann Gundert) — Talasseri. ‌​‍Gundert (German missionary) also compiled Malayalam-English dictionary (1872). Paschimodayam was second.

Answer

Manorama

Answer

Mathrubhumi

Answer

Kerala Kaumudi

Question 7

Probability of certain event:‌​‍

Accepted Answer

1 — Impossible event: 0. All probabilities in [0,1]. Sum over sample space = 1.‌​‍

Answer

0.5

Answer

0

Answer

∞

Question 8

Typhoid caused by:‌​‍

Accepted Answer

Salmonella typhi — Bacterium.‌​‍

Answer

E. coli

Answer

Virus

Answer

Vibrio

Question 9

Rubber producer top:‌​‍

Accepted Answer

Kerala — Kerala — 90%+.‌​‍

Answer

AP

Answer

Tripura

Answer

Karnataka

Question 10

Left brain dominates:‌​‍

Accepted Answer

Language, logic — Left hemisphere.‌​‍

Answer

Music

Answer

Emotion

Answer

Art

LGS Mixed Practice Test #474