Bluish
Dark red
Dark blue and reddish yellow
White
C-C composites are structures in which both matrix and the reinforcement are carbon.
C-C composites have high temperature strength and toughness.
The high cost of C-C composites is a major issue.
All of the above
A only
A, B and C only
A and C only
None of the above
A winter air-conditioning system
A summer air-conditioning system
Filters for removing dust particles
A duct where air is circulated into required space
Insulating with materials whose thickness is below that of critical thickness for insulation.
Providing cooling jackets over the heater pipe surface.
Providing heat exchangers.
Covering heater pipe with another pipe whose thermal conductivity is maller in number and 50 mm thick.