Welding MCQ Quiz - Multiple Choice Questions & Answers Page 5

41. 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

42. 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

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

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

44. 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

45. 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

46. 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

47. The size of a welding machine is determined by

1. Input amperage
2. Output amperage
3. Open circuit voltage
4. Closed circuit voltage

48. If L (mm) is the length of the inner cone of the flame, the tip-to-metal distance should be

1. L mm
2. L + 2 mm
3. L + 4 mm
4. L + 6 mm

49. In a gas cut plate, the cut is high quality although there is some surface roughness caused by vertical drag lines. This is due to

1. less preheating flame
2. impure cutting oxygen
3. too slow cutting speed
4. smaller size cutting nozzle

50. The welding machine, which is used to convert AC welding supply to DC welding supply is

1. Motor generator set
2. Engine generator set
3. Rectifier set
4. Welding transformer