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

26)   

MIG welding machines need an additional:

A.
B.
C.
D.
Answer: B
27)   

SAW (Submerged Arc Welding) machines are generally:

A.
B.
C.
D.
Answer: C
28)   

Which welding machine type is most energy-efficient?

A.
B.
C.
D.
Answer: D
29)   

Which welding set is least portable?

A.
B.
C.
D.
Answer: C
30)   

Multi-process welding machines can perform:

A.
B.
C.
D.
Answer: C
31)   

The primary step in welding machine maintenance is:

A.
B.
C.
D.
Answer: B
32)   

Transformer coils should be protected from:

A.
B.
C.
D.
Answer: A
33)   

Overheating of welding machines can be prevented by:

A.
B.
C.
D.
Answer: C
34)   

Connections in welding machines should be:

A.
B.
C.
D.
Answer: B
35)   

Rectifier cooling fans should be checked for:

A.
B.
C.
D.
Answer: B
36)   

Inverter welding machines are more sensitive to:

A.
B.
C.
D.
Answer: A
37)   

Carbon brushes in generator sets should be:

A.
B.
C.
D.
Answer: B
38)   

Cables for welding should be:

A.
B.
C.
D.
Answer: B
39)   

Transformer oil level (if applicable) should be:

A.
B.
C.
D.
Answer: A
40)   

Arc blow can be reduced by:

A.
B.
C.
D.
Answer: B
41)   

The duty cycle of a welding machine refers to:

A.
B.
C.
D.
Answer: B
42)   

Before storage, welding machines should be:

A.
B.
C.
D.
Answer: B
43)   

Insulation resistance of welding machines is tested using:

A.
B.
C.
D.
Answer: B
44)   

Loose connections in welding leads cause:

A.
B.
C.
D.
Answer: A
45)   

Periodical servicing of welding machines should be done:

A.
B.
C.
D.
Answer: B
46)   

Filters in inverter welders are used for:

A.
B.
C.
D.
Answer: B
47)   

Excessive vibration in a motor-generator set may be caused by:

A.
B.
C.
D.
Answer: B
48)   

Cooling fans in welding machines are essential to:

A.
B.
C.
D.
Answer: B
49)   

For outdoor welding machine storage, it is important to:

A.
B.
C.
D.
Answer: B
50)   

A common safety check before starting a welding machine is:

A.
B.
C.
D.
Answer: A