Bissoy.com
Doctors Medicines MCQs Q&A

Which colored band denotes the 'Carbon dioxide' content in the fire extinguisher?

Which colored band denotes the 'Carbon dioxide' content in the fire extinguisher? Correct Answer Black

Explanation:

  • A fire extinguisher, flame extinguisher or simply extinguisher is an active fire protection device used to extinguish or control small fires, often in emergency situations.
  • It is not intended for use on and out off control fire. 
  • Many types of fire extinguishers are available with different extinguishing 'agents' to deal with different classes of fires. 

Carbon dioxide (CO2):

  • This type is easily distinguished by the distinctively shaped discharge horn.
  • Suitable for class B fires
  • Best suited where contamination by deposits must be avoided.
  • Not generally effective in the open air.
  • If the nozzle gets extremely cold, then it is dangerous to use that Extinguisher.
  • CO2 extinguishers have Black labels on the top of the cylinder

[ alt="F1 Krupalu 11.3.21 Pallavi D2" src="//storage.googleapis.com/tb-img/production/21/03/F1_Krupalu_11.3.21_Pallavi_D2.png" style="width: 177px; height: 318px;">

Water-filled extinguishers 

  • There are two methods of operation.
    1. Gas cartridge type
    2. Stored pressure type
  • Water-filled extinguishers have Red labels on the top of the cylinder

[ alt="F1 Krupalu 11.3.21 Pallavi D5" src="//storage.googleapis.com/tb-img/production/21/03/F1_Krupalu_11.3.21_Pallavi_D5.png" style="width: 258px; height: 316px;">

Foam extinguishers:

  • These may be of stored pressure or gas cartridge types.
  • Foam extinguishers are most suitable for:
    1. flammable liquid fires
    2. running liquid fires
  • Must not be used where electrical equipment is involved.
  • Foam extinguishers have Cream labels on the top of the cylinder

[ alt="F1 Krupalu 11.3.21 Pallavi D3" src="//storage.googleapis.com/tb-img/production/21/03/F1_Krupalu_11.3.21_Pallavi_D3.png" style="width: 190px; height: 314px;">

Dry powder extinguishers:

  • Extinguishers fitted with dry powder may be of the gas cartridge or stored pressure type.
  • The main distinguishing feature is the fork-shaped nozzle.
  • Powders have been developed to deal with class D fires. 
  • Dry powder extinguishers have Blue labels on the top of the cylinder

[ alt="F1 Krupalu 11.3.21 Pallavi D4" src="//storage.googleapis.com/tb-img/production/21/03/F1_Krupalu_11.3.21_Pallavi_D4.png" style="width: 179px; height: 310px;">

Halon extinguishers:

  • These extinguishers may be filled with carbon tetrachloride (CTC) and bromochlorodifluoro methane (BCF).
  • They may be of the either gas cartridge or stored pressure type.
  • They are more effective in extinguishing small fires involving pouring liquids.
  • These extinguishers are particularly suitable and safe to use on electrical equipment as the chemicals are electrically non-conductive.

[ alt="CTC" src="//storage.googleapis.com/tb-img/production/18/11/CTC.PNG" style="width: 164px; height: 300px;">

Related Questions

Which type of fire extinguisher do you use to fight an electrical fire if a carbon dioxide extinguisher is unavailable?
In the following question, the 1st and the last part of the sentence/ passage are numbered 1 and 6. The rest of the sentence/passage is split into four parts and named P, Q, R and S. These four parts are not given in their proper order. Read the sentence/passage and find out which of the four combinations is correct. 1. Global warming is the rise in average surface temperature of the earth globally. P. It is caused by the greenhouse effect of increased level of greenhouse gases. Q. Deforestation also increases carbon dioxide emissions. R. Greenhouse gases include carbon dioxide, CFCs, etc. S. The increasing use of fossil fuels is a major cause of carbon dioxide emission. 6. Carbon dioxide traps heat and causes the greenhouse effect.
In the carbonation of a soft drink, the total quantity of carbon dioxide required is the equivalent of 3 volumes of gas to one volume of water at 0⁰C and atmospheric pressure. Calculate (i) the mass fraction and (ii) the mole fraction of the CO2 in the drink, ignoring all components other than CO2 and water. Basis 1 m3 of water = 1000 kg Volume of carbon dioxide added = 3 m3 From the gas equation, pV = nRT 1 x 3 = n x 0.08206 x 273 n = 0.134 mole. Molecular weight of carbon dioxide = 44 And so weight of carbon dioxide added = 0.134 x 44 = 5.9 kg
In the given Venn diagram, different animals are represented by different areas. 'A' denotes 'dogs', 'B' denotes 'cats', 'C' denotes 'fish', 'D' denotes 'mongooses, 'E' denotes 'rats', and 'F' denotes 'rabbits'. Which area represents the group of only dogs, fishes,  and mongooses?
If ‘<’ denotes ‘-’, ‘+’ denotes ‘+’, ‘-’ denotes ‘=’ ‘=’ denotes ‘<’ and ‘x’ denotes ‘>’, then , '>' denotes '>' which of the following statement is true?
Which among the following is used in fire extinguisher? I. Carbon dioxide II. Oxygen III. Sulphur dioxide
What does the term ‘carbon count’ means? 1. A measure of the amount of carbon dioxide you produce through your lifestyle every day. 2. A measure of the amount of carbon present on Earth. 3. A measure of the amount of carbon and carbon dioxide on Earth. Select the correct answer using the code given below.
The figure shows: 1. Rectangle denotes male 2. Circle denotes urban 3. Square denotes educated 4. Tringle denotes civil servant The number which denotes Uneducated Urban Male:
A question and two statements are given. Decide which of the statement(s) is/are sufficient to answer the question. Question: Nitara has 20 colored pencils of four different colours. How many black pencils does she have? Statements: 1. It has 5 red colored pencils. 2. She has 4 blue colored pencils. 3. The number of green pencils is twice that of blue pencils.
In which of the following conditions distance between molecules of carbon dioxide filled in a container may increase? (i) On increasing the volume of container (ii) On leakage of some carbon dioxide gas from the container (iii) On increasing air pressure in the container (iv) On adding more carbon dioxide gas in container without changing its size