FITTER BITS DAY (09)

 161) by what team the strength of a grinding wheel expressed 

A)GREED

162) name the process of reducing the iron ore to pig iron 

A)SMELTING

163) by what name the impurities floating on the top of molten metal called 

A)SLAG

164) which kind plain carbon steel is used for making axles, drop forgings etc? 

A)MEDIUM CARBON STEEL 

165) what is the disadvantage of Bessemer  process? 

A)INCREASED OXYGEN CONTENT WILL IMPAIR  IT IS A MECHANICAL PROPERTIES 

166) Which is burnt from the molten bath at the second stage of Bessemer process? 

A)CARBON

167) name two metals charged in open hearth process? 

A)PIG IRON AND STEEL SCRAP

168) name any two solid carburising   media 

A)WOOD BONE, LEATHER, CHARCOAL 

169)name two types of solid fuels used in a blacksmith's hearth for hand- forging. 

A)COAL AND CHARCOAL

170) the best placement of stock for heating in the forge is 

A)AWAY FROM THE TUYERE  WITH A THICK LAYER OF COAL ON THE TOP  

171) mild steel rack angel : 

A)25 DEGREES 

172) name the gas used in nitriding process..

A)AMMONIA 

173) what is the hardening temperature for HSS? 

A)1250°C 

174) state any two advantages of flame hardening... 

A)SHORT HARDENING TIME, GREAT DEPTH OF HARDENING, LOW FUEL CONSUMPTION 

175) the body is pulled along so that it slips at a steady speed over the surface is....

A)SLIDING FRICTION

176) the purpose of tempering a hardened steel component is for 

A)REDUCING IT'S BRITTLENESS 

177) name any two carbonaceous materials used for carburising..

A)CHARCOAL, CHARRED LEATHER, BONE 

178) how snips are specified? 

A)OVERALL LENGTH AND SHAPE OF BLADE 

179) what are the functions of flux? 

A)REMOVE OXIDES FROM SOLDERING SURFACE, PREVENTS CORROSION, HELPS MOLTED SOLDER FLOW EASILY 

180) name the process of joint two edges of to metal sheets together 

A)SEAM

FITTER BITS DAY (10) : click here