Which of the following statement is correct about EDM machining?

EDM machining is applied for

A

Shaping carbide dies and punches having complicated profiles

B

Making large number of small holes in sieves and fuel nozzles

C

Embossing and engraving on harder materials

D

All of these

The mechanism of material removal in EDM process is

A

Erosion and Cavitations

B

Cavitations and Evaporation

C

Melting and Evaporation

D

Melting and Corrosion

EDM is the acronym for:

A

Enterprise data management

B

Engineering drawing management

C

Enterprise drawing manipulation

D

Engineering data manipulation

As tool and work are not in contact in EDM process

A

No relative motion occurs between them

B

No wear of tool occurs

C

No power is consumed during metal cutting

D

No force between tool and work occurs

Which of the following statement is correct about hot machining?

A

It requires less power than machining metals at room temperature.

B

The rate of tool wear is lower.

C

It is used for machining high strength and high temperature resistant materials.

D

All of the above

Which of the following statement is wrong about ultrasonic machining?

A

It is best suited for machining hard and brittle materials.

B

It cuts materials at very slow speeds

C

It removes large amount of material

D

It produces good surface finish

The addition of which of the following improves machining of copper?

A

Sulphur

B

Vanadium

C

Tin

D

Zinc

The material which on machining produces chips with built up edge is

A

Brittle material

B

Tough material

C

Hard material

D

Ductile material

The operation of machining several surface of a workpiece simultaneously is called

A

profile milling

B

face milling

C

gang milling

D

none of these

Discontinuous chips are formed during machining of

A

brittle metals

B

ductile metals

C

hard metals

D

soft metals

Which of the following statement is correct about EDM machining?

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