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

1)   

In welding, a transformer is mainly used to:

A.
B.
C.
D.
Answer: B
2)   

A welding transformer changes:

A.
B.
C.
D.
Answer: C
3)   

The device that converts mechanical energy to electrical energy is called:

A.
B.
C.
D.
Answer: C
4)   

In motor-generator (MG) welding sets, the motor is usually powered by:

A.
B.
C.
D.
Answer: B
5)   

The main advantage of MG sets for welding is:

A.
B.
C.
D.
Answer: B
6)   

A DC motor converts:

A.
B.
C.
D.
Answer: B
7)   

The generator in a welding MG set produces:

A.
B.
C.
D.
Answer: B
8)   

In welding transformers, open circuit voltage is generally in the range of:

A.
B.
C.
D.
Answer: B
9)   

Which of the following is NOT a type of motor used in welding MG sets?

A.
B.
C.
D.
Answer: D
10)   

An alternator used in welding generates:

A.
B.
C.
D.
Answer: B
11)   

A rectifier converts:

A.
B.
C.
D.
Answer: B
12)   

Which rectifier type is most common in welding machines?

A.
B.
C.
D.
Answer: C
13)   

The main advantage of rectifier welding sets is:

A.
B.
C.
D.
Answer: B
14)   

An inverter welding machine converts:

A.
B.
C.
D.
Answer: B
15)   

The inverter type welding machine is usually:

A.
B.
C.
D.
Answer: B
16)   

The main advantage of inverter welders is:

A.
B.
C.
D.
Answer: C
17)   

Silicon-controlled rectifiers (SCR) in welding are used for:

A.
B.
C.
D.
Answer: B
18)   

The efficiency of inverter welding machines is typically:

A.
B.
C.
D.
Answer: C
19)   

Which device stores energy temporarily in an inverter welder?

A.
B.
C.
D.
Answer: B
20)   

In welding, ripple in DC output from rectifiers should be

A.
B.
C.
D.
Answer: B
21)   

In arc welding, AC transformer welding sets are best suited for:

A.
B.
C.
D.
Answer: C
22)   

DC generator welding sets produce:

A.
B.
C.
D.
Answer: A
23)   

Rectifier welding machines can use:

A.
B.
C.
D.
Answer: A
24)   

Inverter welding sets can operate on:

A.
B.
C.
D.
Answer: B
25)   

TIG welding machines are usually:

A.
B.
C.
D.
Answer: C