Category Archives: Airframe Sys Power

In a turbo compressor air conditioning system (bootstrap system) the supply of air behind the primary heat exchanger is:

A: compressed, then passed across an expansion turbine and finally across a heat exchanger.
B: passed across an expansion turbine, compressed and then passed through a heat exchanger.
C: passed across an expansion turbine, then directly to the heat exchanger.
D: compressed, passed through a heat exchanger, and then across an expansion turbine.









Answer: D

A gas turbine engine turbine section may employ active clearance control:

A: as a method of attaching the stators and rotors to the hub of the disc.
B: in order to cool the disc.
C: in order to reduce “creep” in the blades.
D: to provide enhanced clearances between the blade tips and the casing.









Answer: D