gas turbine bleed air

#1. An inter-stage air seal is used where:

• AEngine sections are operating at different pressures.
• BEngine sections are subjected to pressures of the same value.
• CIt is more convenient.
• DIt is difficult to obtain access during routine servicing.

#2. An Internal Engine Overheat warning would necessitate:

• AThe oil temperature to be closely monitored.
• BThe EGT to be closely monitored.
• CThe engine power to be reduced to idle.
• DThe engine to be shut down.

#3. Turbine blades are cooled by:

• AH.P. compressor air internally ducted through the blades.
• BH.P. air tapped from the combustion chambers.
• CAir ducted from just before the intake guide vanes.
• DIntermediate pressure air taken from the bleed valves.