Which risk increases when a turbocharger's wastegate actuator malfunctions in a diesel engine?

💡 Explanation

When the wastegate actuator fails, the wastegate can't vent excess exhaust gas, causing uncontrolled boost pressure spikes because the turbocharger spins excessively. Therefore, boost spikes result, not fuel inefficiency, increased PM, or oil degradation, which are linked to separate combustion or lubrication issues.

• Which outcome occurs for an aircraft upon landing with malfunctioning anti-lock brakes?
• Which outcome occurs when reciprocating refrigerant pump valves experience excessive superheat during compression?
• Which outcome accompanies long-term operation of an absorption refrigerator with insufficient generator heat input?
• Which risk increases when welding transverse stiffeners onto a steel I-beam experiencing cyclic loading?
• Which consequence results when residual shell material remains during investment casting?
• Which outcome occurs when an excessively worn lathe tailstock limits rigidity?