MCQ - TNPSC JTO
JTO - 440 - Welder
440 - Unit IV Arc Welding Power Sources
33)
Overheating of welding machines can be prevented by:
A.
B.
C.
D.
34)
Connections in welding machines should be:
A.
B.
C.
D.
35)
Rectifier cooling fans should be checked for:
A.
B.
C.
D.
36)
Inverter welding machines are more sensitive to:
A.
B.
C.
D.
37)
Carbon brushes in generator sets should be:
A.
B.
C.
D.
38)
Cables for welding should be:
A.
B.
C.
D.
39)
Transformer oil level (if applicable) should be:
A.
B.
C.
D.
40)
Arc blow can be reduced by:
A.
B.
C.
D.
41)
The duty cycle of a welding machine refers to:
A.
B.
C.
D.
42)
Before storage, welding machines should be:
A.
B.
C.
D.
43)
Insulation resistance of welding machines is tested using:
A.
B.
C.
D.
44)
Loose connections in welding leads cause:
A.
B.
C.
D.
45)
Periodical servicing of welding machines should be done:
A.
B.
C.
D.
46)
Filters in inverter welders are used for:
A.
B.
C.
D.
47)
Excessive vibration in a motor-generator set may be caused by:
A.
B.
C.
D.
48)
Cooling fans in welding machines are essential to:
A.
B.
C.
D.