Mechanical Engg: Engineering Materials and Manufacturing Quiz 3

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Question 1

Which of the following non-traditional methods of machining is noiseless?

• AElectro-discharge machining
• BUltrasonic machining
• CAbrasive Jet machining
• DNone of the above

Question 2

A round billet made of brass is to be extruded (extrusion constant = 250 MPa) at 700 °C. The billet diameter is 100 mm and the diameter after the extrusion is 50 mm. The extrusion force

• A1.932
• B2.720
• C3.423
• D4.650

Question 3

As per normal dimensions, tolerance of 10 inch will lead to tolerance of:

• A ± 0.001 inch
• B ± 0.01 inch
• C ± 0.05 inch
• D ± 0.10 inch

Question 4

Hook’s law of proportionality in stress strain diagram is shown considering point:

• AOP
• BEY
• CYU
• DUB

Question 5

Alumina doped with magnesia will have reduced thermal conductivity because its structure becomes

• Aamorphous
• Bfree of pores
• Ccrystalline
• Dmixture of crystalline and glass

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