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MCQ - Mechanical TNPSC JTO
JTO - 440 - Welder - 440 - Unit III Set the Oxygen Acetylene Gas Cutting Plant

26)   

Dissolved acetylene cylinders contain:

A.
B.
C.
D.
Answer: C
27)   

The common fuel gas used for jewellery soldering is:

A.
B.
C.
D.
Answer: B
28)   

Which gas mixture is used for very high-speed cutting of steel?

A.
B.
C.
D.
Answer: D
29)   

For welding copper, the preferred gas flame is:

A.
B.
C.
D.
Answer: A
30)   

The hottest region of an oxy-acetylene flame is:

A.
B.
C.
D.
Answer: A
31)   

A neutral flame has an oxygen-to-acetylene ratio of about:

A.
B.
C.
D.
Answer: B
32)   

The neutral flame is used for welding:

A.
B.
C.
D.
Answer: A
33)   

A carburizing flame is also called:

A.
B.
C.
D.
Answer: A
34)   

Carburizing flame is suitable for welding:

A.
B.
C.
D.
Answer: B
35)   

The oxidizing flame is suitable for welding:

A.
B.
C.
D.
Answer: C
36)   

The inner cone temperature of a neutral flame is about:

A.
B.
C.
D.
Answer: D
37)   

A flame with excess oxygen is called:

A.
B.
C.
D.
Answer: B
38)   

The feather-like outer envelope is more prominent in:

A.
B.
C.
D.
Answer: C
39)   

The main application of oxidizing flame is:

A.
B.
C.
D.
Answer: B
40)   

Carburizing flame can cause:

A.
B.
C.
D.
Answer: B
41)   

In welding, excessive oxidizing flame can result in:

A.
B.
C.
D.
Answer: B
42)   

For welding aluminium, the flame adjustment should be:

A.
B.
C.
D.
Answer: A
43)   

Which flame has the shortest inner cone?

A.
B.
C.
D.
Answer: B
44)   

The oxygen pressure is generally higher than acetylene pressure in:

A.
B.
C.
D.
Answer: B
45)   

A flame with a long, white inner cone is:

A.
B.
C.
D.
Answer: B
46)   

The neutral flame is identified by:

A.
B.
C.
D.
Answer: A
47)   

An oxidizing flame is generally unsuitable for:

A.
B.
C.
D.
Answer: B
48)   

For lead burning, the preferred flame is:

A.
B.
C.
D.
Answer: A
49)   

Which flame produces the highest oxidation potential?

A.
B.
C.
D.
Answer: B
50)   

The slightly carburizing flame temperature is approximately:

A.
B.
C.
D.
Answer: C