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MCQ - Mechanical TNPSC JTO
JTO - 440 - Welder - 440 - Unit V Arc Welding Positions

51)   

In DC welding, current flowing from electrode to workpiece is called:

A.
B.
C.
D.
Answer: A
52)   

Straight polarity in DC welding is also known as:

A.
B.
C.
D.
Answer: A
53)   

In reverse polarity, electrons flow from:

A.
B.
C.
D.
Answer: B
54)   

Reverse polarity in DC welding is also termed as:

A.
B.
C.
D.
Answer: A
55)   

Which polarity gives deeper penetration in DC welding?

A.
B.
C.
D.
Answer: A
56)   

Which polarity is preferred for welding thin sheets?

A.
B.
C.
D.
Answer: B
57)   

For welding aluminium with DC, which polarity is preferred?

A.
B.
C.
D.
Answer: A
58)   

Which polarity is used in TIG welding for non-ferrous metals?

A.
B.
C.
D.
Answer: A
59)   

AC polarity alternates current flow:

A.
B.
C.
D.
Answer: B
60)   

Which welding process uses both AC and DC polarity?

A.
B.
C.
D.
Answer: D
61)   

For deep penetration in carbon steel welding, the polarity used is:

A.
B.
C.
D.
Answer: A
62)   

Reverse polarity is also used for:

A.
B.
C.
D.
Answer: A
63)   

In DCEP, the electrode gets:

A.
B.
C.
D.
Answer: A
64)   

In DCEN, the workpiece gets:

A.
B.
C.
D.
Answer: A
65)   

Which polarity reduces spatter in welding?

A.
B.
C.
D.
Answer: A
66)   

MIG welding of steel is usually done with:

A.
B.
C.
D.
Answer: A
67)   

In DCEN, electrons travel from:

A.
B.
C.
D.
Answer: A
68)   

Which polarity is also called electrode negative?

A.
B.
C.
D.
Answer: A
69)   

Which polarity is best for welding magnesium?

A.
B.
C.
D.
Answer: B
70)   

Polarity affects:

A.
B.
C.
D.
Answer: D
71)   

A common destructive test for weld quality is:

A.
B.
C.
D.
Answer: A
72)   

A non-destructive test using liquid to reveal surface cracks is:

A.
B.
C.
D.
Answer: B
73)   

Porosity in welds is caused by:

A.
B.
C.
D.
Answer: A
74)   

Slag inclusion occurs due to:

A.
B.
C.
D.
Answer: A
75)   

Cracks in weld are caused by:

A.
B.
C.
D.
Answer: D