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MCQ - TNPSC JTO

JTO - 440 - Welder

440 - Unit III Set the Oxygen Acetylene Gas Cutting Plant

49)   

Which flame produces the highest oxidation potential?

A.
B.
C.
D.
50)   

The slightly carburizing flame temperature is approximately:

A.
B.
C.
D.
51)   

The oxidizing flame temperature is approximately:

A.
B.
C.
D.
52)   

Carburizing flame is preferred in welding of:

A.
B.
C.
D.
53)   

A hissing sound from the flame usually indicates:

A.
B.
C.
D.
54)   

The feather in a carburizing flame is due to:

A.
B.
C.
D.
55)   

Neutral flame is preferred because:

A.
B.
C.
D.
56)   

The oxidizing flame is often used for:

A.
B.
C.
D.
57)   

Which flame causes zinc loss in brass welding?

A.
B.
C.
D.
58)   

Carburizing flame has what effect on mild steel welds?

A.
B.
C.
D.
59)   

The inner cone color in a neutral flame is:

A.
B.
C.
D.
60)   

Which type of flame has the highest flame velocity?

A.
B.
C.
D.
61)   

The principle of oxy-acetylene cutting is based on:

A.
B.
C.
D.
62)   

In gas cutting, the cutting jet consists of:

A.
B.
C.
D.
63)   

The main function of preheat flames in gas cutting is to:

A.
B.
C.
D.
64)   

The ignition temperature of steel in oxygen is about:

A.
B.
C.
D.