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For the following questions answer them individually
Stud and projection welding belong to the following category of welding _____.
gas welding
arc welding
resistance welding
pressure welding
Electrode gets consumed in the following welding process _____.
gas
resistance
thermit
arc
The strength of a properly welded joint as compared to base metal would be _____.
same
more
less
unpredictable
Oxygen to acetylene ratio in case of carburising flame is _____.
0.5 : 1
0.9 : 1
1 : 1
1 : 1.2
For steel castings, the following type of sand is better _____.
fine-grain
coarser-grain
medium grain
fine-grain, coarser-grain and medium grain all are equally good
Hot tear refers to _____.
casting defect
process of fabrication
process of heat treatment
weathering of non-ferrous materials
Slick in a foundry shop is used to _____.
make and repair corners in a mould
thoroughly mix up moulding sand
make venting holes in the mould
prepare gates
Which of the following processes would produce best components?
die casting
hot rolling
extrusion
forging
A sprue hole is _____.
a casting defect
a hold made for riveting
a blind hole in jigs
an opening in mould for pouring molten metal
Coining is the operation of _____.
cold forging
hot forging
cold extrusion
piercing
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