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MCQ - Mechanical TNPSC JTO
JTO - 440 - Welder - 440 - Unit IV Arc Welding Power Sources

51)   

In AC welding, the current changes direction:

A.
B.
C.
D.
Answer: C
52)   

In DC welding, current flows:

A.
B.
C.
D.
Answer: B
53)   

A.C. welding machines are generally

A.
B.
C.
D.
Answer: A
54)   

D.C. welding machines can be:

A.
B.
C.
D.
Answer: A
55)   

The frequency of AC supply in India is:

A.
B.
C.
D.
Answer: B
56)   

One main advantage of AC welding machines is:

A.
B.
C.
D.
Answer: A
57)   

AC welding machines are generally:

A.
B.
C.
D.
Answer: A
58)   

In AC welding, arc blow is:

A.
B.
C.
D.
Answer: B
59)   

AC welding is better suited for welding:

A.
B.
C.
D.
Answer: A
60)   

AC machines require:

A.
B.
C.
D.
Answer: A
61)   

One main disadvantage of AC welding is:

A.
B.
C.
D.
Answer: A
62)   

AC welding is generally not preferred for:

A.
B.
C.
D.
Answer: A
63)   

In AC welding, starting the arc is:

A.
B.
C.
D.
Answer: B
64)   

AC welding machines are unsuitable for:

A.
B.
C.
D.
Answer: C
65)   

Arc interruptions in AC welding occur

A.
B.
C.
D.
Answer: B
66)   

DC welding produces

A.
B.
C.
D.
Answer: A
67)   

DC welding allows:

A.
B.
C.
D.
Answer: A
68)   

In DC welding, polarity can be:

A.
B.
C.
D.
Answer: C
69)   

DC welding is better for:

A.
B.
C.
D.
Answer: A
70)   

With DCEP (reverse polarity) in DC welding:

A.
B.
C.
D.
Answer: B
71)   

One major disadvantage of DC welding is:

A.
B.
C.
D.
Answer: A
72)   

DC welding machines are generally:

A.
B.
C.
D.
Answer: A
73)   

Arc blow is more common in:

A.
B.
C.
D.
Answer: B
74)   

DC welding requires:

A.
B.
C.
D.
Answer: A
75)   

DC machines are less efficient for:

A.
B.
C.
D.
Answer: A