Powerplant turbine engines oral q

What is the purpose of the interconnecting tubes attached between can-type combustion chambers?

For flame propagation (spreading the ignition) during start.

What functions do axial-flow turbine nozzles perform?

They direct the mass airflow to drive the turbine rotor at a specific angle (converting gas energy into kinetic energy).

What are carbon seals used for in turbine engines?

They are used as oil seals for the rotor shaft bearings.

What is fan blade shingling?

It is the overlapping of the mid-span shrouds of the fan blade.

What powers the variable inlet guide vanes used on some APUs to regulate compressor intake airflow?

Fuel pressure.