MCQ - TNPSC JTO
JTO - 440 - Welder
440 - Unit IV Arc Welding Power Sources
49)
For outdoor welding machine storage, it is important to:
A.
B.
C.
D.
50)
A common safety check before starting a welding machine is:
A.
B.
C.
D.
51)
In AC welding, the current changes direction:
A.
B.
C.
D.
52)
In DC welding, current flows:
A.
B.
C.
D.
53)
A.C. welding machines are generally
A.
B.
C.
D.
54)
D.C. welding machines can be:
A.
B.
C.
D.
55)
The frequency of AC supply in India is:
A.
B.
C.
D.
56)
One main advantage of AC welding machines is:
A.
B.
C.
D.
57)
AC welding machines are generally:
A.
B.
C.
D.
58)
In AC welding, arc blow is:
A.
B.
C.
D.
59)
AC welding is better suited for welding:
A.
B.
C.
D.
60)
AC machines require:
A.
B.
C.
D.
61)
One main disadvantage of AC welding is:
A.
B.
C.
D.
62)
AC welding is generally not preferred for:
A.
B.
C.
D.
63)
In AC welding, starting the arc is:
A.
B.
C.
D.
64)
AC welding machines are unsuitable for:
A.
B.
C.
D.