UPPSC 2021 GS-I General science
Question

"Ringelmann scale" is used to measure density of ?

Answer & Solution

Answer: (Detailed Solution Below)

Option A: Smoke

Detailed Solution:

The correct answer is “Smoke”.

The Ringelmann scale is a scale for measuring the apparent density or opacity of smoke.

It was developed by a French professor of agricultural engineering Maximilien Ringelmann of La Station d'Essais de Machines in Paris, who first specified the scale in 1888.

Similar Questions:

Consider the following statements about haemoglobin:

1. It contains iron
2. It is a carrier of oxygen in the blood.
3. It imparts red colour to the blood.
4. It provides immunity against certain diseases.

Of these statements:
  1. 1, 2 and 4 are correct
  2. 1, 2 and 3 are correct
  3. 2, 3 and 4 are correct
  4. 1, 3 and 4 are correct
Which of the following newspapers won the "Pulitzer Prize, 2021" in the prestigious public service category?
  1. The Wall Street Journal
  2. The New York Times
  3. The Washington Post
  4. New York Post
Tapa cloth is obtained from the plants of which one of the following family?
  1. Asclepiadaceae
  2. Moraceae
  3. Graminae
  4. Malvaceae
With which of the following is the tape of the tape recorder coated?
  1. Copper sulphate
  2. Ferromagnetic powder
  3. Zinc oxide
  4. Mercury
A fluorescent tube is preferred to an electric bulb because:
  1. It has a larger light emitting surface
  2. Voltage fluctuations do not affect it
  3. In a tube electrical energy is almost full converted into light.
  4. None of the above
The energy of the sun is produced by
  1. Nuclear fission
  2. Ionisation
  3. Nuclear fusion
  4. Oxidation
The micro-organism which is associated with the production of Bt cotton is a:
  1. Fungus
  2. Bacterium
  3. Blue green Alga
  4. Virus
Which of the following is an insectivorous plant?
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  2. Nelumbo
  3. Nicotiana
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Arrange the following foreign travelers in chronological order of their arrival in India :

I. William Hawkins
II. Ralph Fitch
III. Sir Thomas Roe
IV. Nicholas Dawnton

Select the correct answer using the codes given below.
Codes :
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  2. IV, II, I and III
  3. I, III, II and IV
  4. III, II, IV and I
The normal temperature of human body is:
  1. 98.4°F
  2. 98°F
  3. 98.8°F
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The planet nearest to the earth is:
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  2. Venus
  3. Mars
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A sample of any of the following substances disappears after sometime when exposed to air like camphor, naphthalene or dry ice. This phenomenon is called:
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  2. Evaporation
  3. Diffusion
  4. Radiation