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WorksheetsUnit 1 & 2 Foundry,Casting,Welding
Total questions: 20
Worksheet time: 20mins
A pattern in foundry process refers to .
a foundry tool
a moulding process
the model of casting
a method of casting
Shrinkage allowance is given to:
Compensate for contraction
Provide draft
Improve surface finish
Facilitate machining
Cores are used to .
make hollow or a hole in a casting.
strengthen moulding sand
support loose pieces
remove pattern easily
The main function of flux in cupola is to:
Act as fuel
Remove impurities
Increase melting temperature
Harden the metal
The ability of moulding sand to withstand the high temperature of the molten metal is called:
Porosity
Strength
Adhesiveness
Refractoriness
Continuous casting is commonly used for:
Pistons
Bearings
Billets and blooms
Jewellery
Which die casting process involves the melting pot being a part of the machine?
Cold chamber process
Hot chamber process
Gravity process
Vacuum process
In which casting process does a rotating mould use centrifugal force to shape the casting?
Die casting
Investment casting
Centrifugal casting
Continuous casting
A blow hole in casting is caused by:
Cold metal
Gases trapped
High temperature
Core shifting
Which is a method for cleaning castings?
Painting
Welding
Shot blasting
Anodizing
What is welding?
A process for cutting metal
A process for joining materials by causing coalescence
A process for bending metal
A process for cleaning metal
In MIG welding, the electrode is:
Non-consumable
Consumable and fed automatically
Made of carbon
A tungsten rod
Gas welding uses the heat from the combustion of what?
Electricity
A fuel gas and oxygen
Kerosene
Coal
Which flame has equal amounts of oxygen and acetylene and is used for most general welding?
Oxidizing flame
Carburizing flame
Neutral flame
Excess fuel flame
What color are oxygen hoses typically in oxy-acetylene welding setups?
Red
Black or Green
Blue
Yellow
The main purpose of a flux in welding is to:
Add metal to the weld
Prevent oxidation and clean the weld pool
Increase the arc temperature
Cool the weld quickly
Which of the following is a type of resistance welding?
TIG welding
Spot welding
Gas welding
Arc cutting
In projection welding, where is the heat concentrated?
At the electrode tips
Along the entire surface
At small projections or embossments on the workpiece
Away from the joint
What is the key difference between welding and brazing?
Brazing uses pressure, welding does not
In brazing, the base metal is not melted; in welding, it is melted
Welding is only for steel
Brazing uses a flux, welding does not
Magnetic particle test is used to find .
surface cracks
slag inclusions
blow holes
porosity
