Welding MCQ Quiz - Multiple Choice Questions & Answers

1. The top edge is melted round and the cut face is not smooth in gas cutting. This is due to

1. extremely slow cutting speed
2. insufficient acetylene pressure
3. the tip being held too high
4. too much cutting oxygen pressure

2. If the blowpipe is moved to and fro frequently while cutting the kerf will

1. be more
2. of correct size
3. be less
4. not be affected

3. The electrodes are manufactured in two standard lengths namely

1. 350 mm and 250 mm
2. 350 mm and 450 mm
3. 400 mm and 500 mm
4. 12 inches and 10 inches

4. Which fuel gas is used for cutting deep under water?

1. Acetylene
2. Hydrogen
3. LPG
4. Methane

5. While gas cutting the nozzle should

1. almost touch the work
2. be 10 mm away from work
3. be 2 mm away from work
4. be 5 mm away from work

6. The electrode size refers to

1. diameter of its core wire
2. diameter (overall) of electrode
3. thickness of flux coating
4. length of electrode

7. The position in which it is easiest to weld is

1. Flat
2. Vertical
3. Horizontal
4. Overhead

8. Which type of fire extinguisher is used in a welding shop?

1. Foam type extinguisher
2. Dry powder extinguisher
3. CO2 extinguisher
4. Halon extinguisher

9. If a worker has suffered from electric shock, he should be

1. given an alcoholic drink
2. given a cold drink
3. made to walk
4. kept warm and covered

10. The arc utilized in electric arc welding is a

1. High voltage, high current discharge
2. Low voltage, low current discharge
3. Low voltage, high current discharge
4. High voltage, low current discharge