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MCQ - Mechanical TNPSC JTO
JTO - 436 - Fitter - 436 - Unit IV Welding

151)   

Which fire extinguisher is most suitable for welding shop fires caused by flammable gases?

A.
B.
C.
D.
Answer: C
152)   

A backfire in oxy-acetylene torch means:

A.
B.
C.
D.
Answer: B
153)   

Which equipment prevents flame from travelling back into the cylinders during gas welding?

A.
B.
C.
D.
Answer: B
154)   

What is the color code of oxygen cylinder in India?

A.
B.
C.
D.
Answer: B
155)   

The oxygen pressure regulator is usually colored:

A.
B.
C.
D.
Answer: A
156)   

The acetylene pressure regulator is usually colored:

A.
B.
C.
D.
Answer: B
157)   

What is the maximum safe working pressure of acetylene gas in a cylinder?

A.
B.
C.
D.
Answer: A
158)   

Which cutting process uses pure oxygen jet to oxidize and remove metal?

A.
B.
C.
D.
Answer: C
159)   

What is the approximate flame temperature of oxy-acetylene flame?

A.
B.
C.
D.
Answer: C
160)   

Neutral flame in oxy-acetylene cutting is used because it:

A.
B.
C.
D.
Answer: B
161)   

Which flame is suitable for cutting mild steel using oxy-acetylene?

A.
B.
C.
D.
Answer: A
162)   

Which is a common defect in oxy-acetylene cutting?

A.
B.
C.
D.
Answer: A
163)   

Which arc welding defect is caused by trapped gases in weld metal?

A.
B.
C.
D.
Answer: A
164)   

A longitudinal crack in weld occurs due to:

A.
B.
C.
D.
Answer: B
165)   

Which defect is observed when slag remains in weld metal?

A.
B.
C.
D.
Answer: C
166)   

Arc blow is more common in:

A.
B.
C.
D.
Answer: B
167)   

In arc welding, undercut defect means:

A.
B.
C.
D.
Answer: B
168)   

Preheating before welding is mainly done to:

A.
B.
C.
D.
Answer: C
169)   

Electrode storage should be in:

A.
B.
C.
D.
Answer: C
170)   

Why electrodes are stored in a heated oven?

A.
B.
C.
D.
Answer: B
171)   

Which electrode type is highly sensitive to moisture?

A.
B.
C.
D.
Answer: C
172)   

The main purpose of electrode coating is to:

A.
B.
C.
D.
Answer: B
173)   

Which standard gives classification of welding electrodes?

A.
B.
C.
D.
Answer: B
174)   

For how long should low-hydrogen electrodes be baked before use?

A.
B.
C.
D.
Answer: C
175)   

What happens if electrodes absorb moisture?

A.
B.
C.
D.
Answer: B