Previous year MCQs

General science UPPSC 2009 GS-I
Question

The leaning tower of Pisa does not fall because:

Answer & Solution

Answer: (Detailed Solution Below)

Option D: the vertical line through the centre of gravity of the tower falls within the base

Detailed Solution:

The correct answer is “the vertical line through the centre of gravity of the tower falls within the base”.
For any object to remain stable and not fall over, its center of gravity must be aligned vertically over its base of support. In the case of the Leaning Tower of Pisa, even though it leans, its center of gravity is still positioned over the area of its base, allowing it to remain standing.

Similar Questions:

Mirage is an example of:
  1. A) Refraction
  2. B) Total internal reflection
  3. C) Dispersion
  4. D) Diffraction
Match list I with list II and select the correct answer from the code given below:
List-I (Acid) - List-II (Source)

A. Lactic acid - 1. Lemon
B. Acetic acid - 2. Rancid butter
C. Citric acid - 3. Milk
D. Butyric acid - 4. Vinegar

Code:
A B C D
  1. A) 1 4 3 4
  2. B) 3 4 1 2
  3. C) 2 3 4 2
  4. D) 3 2 3 1
Which one of the following is not an award given on the National Awards Day?
  1. A) Rajiv Khel Ratna
  2. B) Arjun Award
  3. C) Dhyanchand Award
  4. D) Vishwamitra Award
Poverty level in India is established on the basis of:
  1. A) per capita income in different States
  2. B) house-hold average income
  3. C) house-hold consumer expenditure
  4. D) slum population in the country
Which one of the following forms an irreversible complex with haemoglobin of the blood?
  1. A) Carbon dioxide
  2. B) Pure Nitrogen gas
  3. C) Carbon monoxide
  4. D) A mixture of carbon dioxide and helium
The electric wire used in the fuse has the characteristic features of:
  1. A) Low resistance/High melting point
  2. B) Low resistance/Low melting point
  3. C) High resistance/Low melting point
  4. D) High resistance/High melting point
Which one of the following gases is used for the purification of drinking water?
  1. A) Sulphur dioxide
  2. B) Chlorine
  3. C) Fluorine
  4. D) Carbon dioxide
Smaller forms of computers are possible because of use of which substance?
  1. A) Transistor
  2. B) Integrated circuit chips
  3. C) Nano material
  4. D) Super Conductor
Pencil lead is:
  1. A) graphite
  2. B) charcoal
  3. C) lamp blac
  4. D) coal
Heroin is obtained from
  1. A) Indian hemp
  2. B) Opium poppy
  3. C) Tobacco
  4. D) Arecanut
Which one of the following years is known as the "Year of the Great Divide" with regard to population, after which there has been a continuous and rapid growth in India's population?
  1. A) 1911
  2. B) 1921
  3. C) 1941
  4. D) 1951
SONAR is mostly used by:
  1. A) Astronauts
  2. B) Doctors
  3. C) Engineers
  4. D) Navigators