Engineering Workshop

What a principal processes of machining do you know?

• Turning

  Drilling

• Drilling

  Milling

  Coating

• Turning

  Drilling

  Milling

• Annelling

  Milling

  Turning

 What is Intrinsic semiconductors?

• Based on pentavalent elements

• The trivalent impurity semiconductors

• Pure form semiconductor

As semiconductor devices have no filaments, hence no power is needed to heat them to cause the emission of electrons.

• True

• False

In high frequency range, semiconductors have poor response

• False

• True

What materials useful for Solar cells

• Si, Ge, SiAs

• Si, CdS, GaAs

• Ge, SiC, BN

What is Nanotechnology?

• the control of matter on the mikro level

• the control of matter on the makro level

• the control of matter on the atomic level

What is a nanometer?

• m = 0.000000001

• m = 1.00000000

• m = 0.0000001

What is Clean room?

• It is well isolated room

• It is a big laboratory

• it is a Wight room

What types of materials commonly use for aircrafts now a days?

• Composites

  Steel

  Wood

• Al

  Ca

  Steel

• Ti

  Composites

  Steel

What materials were first planes made of?

• Wood and fabric

• Steel and Corbon

• Cast iron and Wood