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Engineering :: Production Engineering

401.  The rating of solder iron normally used for electronics work is
A. 50 to 100 watts B. 250 to 500 watts
C. 500 to 750 watts D. 750 to 1000 watts
E. 1 kW to 2 kW    
402.  The range of temperature for soldering process is
A. 10?C to 50?C B. 50?C to 100?C
C. 180?C to 250?C D. 250?C to 400?C
E. 400?C to 650?C    
403.  Zinc chloride finds application in
A. TIG welding B. Thermit welding
C. Soft soldering D. Brazing
E. Post weld cleaning    
404.  During soldering
A. Arc is produced between solder iron and metal to be soldered B. Solder iron bit is red hot
C. Joint area must be clean and close fitting D. Borax is used a flux
E. Metal is heated from top as well as bottom    
405.  During electron beam welding the vacuum is of the order of
A. 10-5 torr B. 10-4 torr
C. 10-3 torr D. 10-2 torr
E. 1 torr    
406.  During oxyacetylene flame cutting, the metal is cut due to
A. Molecular transfer B. Evaporation of metal
C. Burning of metal D. Intensive oxidation
E. Reduction process    
407.  Which of the following test can be used to detect surface cracks in the welding of non-magnetic alloys?
A. Fluorescent test B. Gamma ray test
C. X-ray test D. Magnaflux test
E. Any of the above    
408.  The bit of solder iron is generally made of
A. Cast iron B. Mild steel
C. Stainless steel D. High speed steel
E. Copper    
409.  Which of the following process is preferred for the welding of grey cast iron?
A. TIG B. MIG
C. Submerged arc D. Oxy-acetylene
E. Thermit    
410.  Preheating is usually done while welding
A. Thin sheets of mild steel B. Thick sheets of mild steel
C. Cast iron D. Copper
E. Aluminium    

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