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MCQ - Mechanical TNPSC JTO
JTO - 436 - Fitter - 436 - Unit IV Welding

76)   

For cutting 25 mm thick mild steel, the oxygen pressure should be approximately:

A.
B.
C.
D.
Answer: C
77)   

The arc length should be approximately equal to:

A.
B.
C.
D.
Answer: B
78)   

If the arc length is too long, it results in:

A.
B.
C.
D.
Answer: C
79)   

The selection of electrode depends mainly on:

A.
B.
C.
D.
Answer: B
80)   

An electrode with "E6013" designation has a tensile strength of:

A.
B.
C.
D.
Answer: B
81)   

The last two digits in electrode "E7018" indicate:

A.
B.
C.
D.
Answer: B
82)   

Acetylene becomes dangerous at pressures above:

A.
B.
C.
D.
Answer: D
83)   

Which of the following is a safety rule for gas welding?

A.
B.
C.
D.
Answer: C
84)   

The maximum safe storage pressure for acetylene in cylinders is about:

A.
B.
C.
D.
Answer: D
85)   

Which material is used inside acetylene cylinders to dissolve acetylene safely?

A.
B.
C.
D.
Answer: C
86)   

Which defect is commonly seen in gas welding?

A.
B.
C.
D.
Answer: C
87)   

Arc length is influenced by:

A.
B.
C.
D.
Answer: D
88)   

Which welding position requires lower current setting?

A.
B.
C.
D.
Answer: D
89)   

The term "weld bead" refers to:

A.
B.
C.
D.
Answer: B
90)   

What is the effect of using too high current setting?

A.
B.
C.
D.
Answer: C
91)   

Why are special flint strikers used to ignite gas torches?

A.
B.
C.
D.
Answer: B
92)   

Which tool is used to check the straightness of a joint before welding?

A.
B.
C.
D.
Answer: A
93)   

What is the purpose of a welding positioner?

A.
B.
C.
D.
Answer: B
94)   

Electrode holders are rated based on:

A.
B.
C.
D.
Answer: C
95)   

What should be used to protect nearby flammable materials during welding?

A.
B.
C.
D.
Answer: C
96)   

Why is earthing (grounding) important in arc welding?

A.
B.
C.
D.
Answer: A
97)   

A cracked welding cable should be:

A.
B.
C.
D.
Answer: C
98)   

A cracked welding cable should be:

A.
B.
C.
D.
Answer: C
99)   

When transporting a gas cylinder, you should:

A.
B.
C.
D.
Answer: C
100)   

The main purpose of welding curtains or screens is to:

A.
B.
C.
D.
Answer: C