Which risk increases when a turbofan engine's variable stator vanes remain fixed during flight?

💡 Explanation

Compressor stall and surging risk increases because fixed vanes disrupt airflow's angle of attack, exceeding the stall limit of the compressor blades; therefore, stall occurs disrupting pressure, rather than optimal flow control with correctly angled vanes.

• Which outcome occurs during insufficient guard interval duration in orthogonal frequency-division multiplexing?
• Which risk increases when cathodic protection fails for rebar in a coastal concrete bridge pier?
• Which consequence results when the radio signal attenuates significantly more along one propagation path, within a mobile network?
• Which outcome occurs when pulsations overload a hydro-pneumatic accumulator?
• Which outcome occurs when rapid cycling of a chiller evaporator causes excessive superheat?
• Which failure propagates most rapidly in reinforced concrete columns failing under compression?