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Workshop Technology

Workshop Technology
A zinc diffusion process is called

Anodizing
Galvanizing
Parkerising
Sherardizing

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Workshop Technology
Loam sand is a mixture of

50% sand and 50% clay
90% sand and 10% clay
30% sand and 70% clay
70% sand and 30% clay

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Workshop Technology
The shrinkage allowance for cast iron pattern is

26 mm/m
20 mm/m
16 mm/m
10 mm/m

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Workshop Technology
When filing soft metals, the file teeth are clogged with minute particles of metal. The file should be cleaned by

Washing it with water
Rubbing on wood
Washing it with dilute acid
Using file card

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Workshop Technology
The oxygen cylinder is usually painted with

White colour
Maroon colour
Black colour
Yellow colour

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Workshop Technology
Which one of the following material will require the largest size of riser for the same size of casting?

Cast iron
Aluminium
Steel
Copper

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