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Manufacturing Engineering Ii
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Quiz 1
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Q.1
How many ways are there for making the fixed cores by wire cut EDM process?
a) 2
b) 3
c) 4
d) 5
Q.2
_____ grades wire are used in automatic re-threading mechanisms.
a) Malleable
b) Softer
c) Harder
d) Commercial
Q.3
For machining of high melting point materials, _____ wires are used.
a) gallium
b) zinc coated
c) aluminium coated
d) silver
Q.4
_____ is/are used as di-electric fluid in die sink EDM process.
a) Pure water
b) Silicone gel
c) Petroleum products
d) Epoxy resins
Q.5
Which of the following is not the application of wire cut EDM process?
a) Machining ejector holes
b) Cutting the ejector pins
c) Machining cores of various moulds
d) Machining of complex shapes made of plastic
Q.6
During mould making by wire cut EDM, it is important to harden ______ to counter the effects of changes in the shape of the workpiece due to heat treatment.
a) the insert
b) electrode wire
c) electrode holding coils
d) bolting points in the workpiece
Q.7
Which of the following machining process is usually preferred for cutting of ejectors which are used in mould making?
a) Milling
b) Hobbing
c) Wire-cut EDM
d) Die sink EDM
Q.8
The selection of the manufacturing process depends upon ____________
a) chemical reactivity between the mould material and the di-electric fluid
b) mould shape
c) application of the mould
d) number of parts to be machined
Q.9
The wire EDM process is used for making moulds with high drafted walls.
a) True
b) False
Q.10
For manufacturing of complex shapes, soft electrode wires are used.
a) True
b) False
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