Question:
Which of the following gases is widely used in gas welding process?
Which of the following gases is widely used in gas welding process?
Show Hint
Oxy-acetylene welding is the most popular gas welding method because burning acetylene in oxygen produces the hottest flame of all hydrocarbon gases.
Updated On: Aug 7, 2026
- Carbon monooxide
- Acetylene
- Ammonia
- CFC
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Gas welding is a thermal joining process where metals are melted using the heat generated by a gas flame.
The process requires a fuel gas that, when burned with oxygen, produces an extremely high flame temperature.
Step 2: Detailed Explanation:
Oxy-fuel gas welding most commonly utilizes Acetylene ($C_2H_2$) as the fuel gas.
When acetylene is burned with pure oxygen, it undergoes a highly exothermic combustion reaction:
\[ 2C_2H_2 + 5O_2 \rightarrow 4CO_2 + 2H_2O + \text{Heat} \]
This reaction produces an oxy-acetylene flame with a temperature of approximately 3100$^\circ$C to 3300$^\circ$C.
This temperature is high enough to melt all commercial metals and alloys, including mild steel and stainless steel.
Carbon monoxide is a toxic gas and not used as a fuel gas.
Ammonia and chlorofluorocarbons (CFCs) are refrigerants and do not support combustion.
Therefore, acetylene is the gas widely used in the gas welding process.
Step 3: Final Answer
The correct option is (B).
Gas welding is a thermal joining process where metals are melted using the heat generated by a gas flame.
The process requires a fuel gas that, when burned with oxygen, produces an extremely high flame temperature.
Step 2: Detailed Explanation:
Oxy-fuel gas welding most commonly utilizes Acetylene ($C_2H_2$) as the fuel gas.
When acetylene is burned with pure oxygen, it undergoes a highly exothermic combustion reaction:
\[ 2C_2H_2 + 5O_2 \rightarrow 4CO_2 + 2H_2O + \text{Heat} \]
This reaction produces an oxy-acetylene flame with a temperature of approximately 3100$^\circ$C to 3300$^\circ$C.
This temperature is high enough to melt all commercial metals and alloys, including mild steel and stainless steel.
Carbon monoxide is a toxic gas and not used as a fuel gas.
Ammonia and chlorofluorocarbons (CFCs) are refrigerants and do not support combustion.
Therefore, acetylene is the gas widely used in the gas welding process.
Step 3: Final Answer
The correct option is (B).
Was this answer helpful?
0
0
Top ICAR AIEEA Dairy Technology Questions
- As per legal standards (FSSR, 2011), the acidity (%LA) of chakka should not be more than:
- Which of the following food additive is permitted as preservative in paneer?
- Given below are four statements:
Statement (I) : Homogenisation breaks down fat globules in milk into smaller entities.
Statement (II) : Homogenisation breaks down fat globules and casein micelles in milk into smaller entities.
Statement (III) : Homogenisation slightly increases viscosity of milk.
Statement (IV) : Homogenisation improves the appearance of milk.
In light of the above statements, choose the most appropriate answer from the options given below. - With regard to temperature of operation, place the following unit operations in sequence in an increasing order of temperature:
(i) Sterilisation
(ii) Thermisation
(iii) Homogenisation
(iv) Bactofugation and
(v) HTST pasteurization.
Choose the correct answer from the options given below : - “Narampak” and “karapak” refer to varieties of sandesh with reference to which of the following parameters ?
View More Questions
Top ICAR AIEEA Engineering Mathematics Questions
- Which of the following principle is related to dimensional analysis ?
- The equation for alternating voltage is given by :
- A conductor of length 1.75 metre moves at right angles to a uniform magnetic field of flux density 0.5 Wb/m\(^{2}\) with a velocity of 60 metre/second. Calculate the e.m.f. induced in it.
- A coil with "I" amperes of current and "R" ohm resistance and "t" is time in second, the heat produced 'H' in joules is given by which of the following equation ?
- The compression ratios for diesel engines lie in the range of :
View More Questions
Top ICAR AIEEA Questions
- Which of the following statements is false?
- Which of the following is an example of an inventory?
- According to Adam Smith, productivity gains could be brought about through .
- The supply curve for an artificially scarce good is .
- Which of the following would not be considered an opportunity cost of paid employment?
View More Questions