Which outcome results when a turbocharger's wastegate malfunctions and remains closed during high engine load?

💡 Explanation

When a wastegate remains closed, boost pressure increases uncontrolled because it cannot vent excess exhaust gas, leading to cylinder pressures exceeding design limits, causing knock. Therefore engine knock results, rather than fuel starvation, catalyst failure, or increased filter efficiency each requiring different pressure scenarios or fuel conditions.

• Which outcome is observed when a proportional valve's spool sticks in a hydraulic servo system?
• Which risk increases when high-impedance resonant LC circuit is unintentionally energized in a substation?
• Which unstable oscillation arises when servo-valve-controlled hydraulic actuator performance degrades?
• Which stall consequence arises when asymmetrical ice accumulation changes airfoil geometry?
• Which risk increases when a swept-wing aircraft experiences ice accretion near the wing root?
• Which instability increases when a hydraulic actuator's positioning control loop oscillates?