MDE 4 Q7

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1. Air Leak in Intake System or Charge Air Cooler

Question: What is a simple and economical maintenance routine to address an air leak in the intake system or charge air cooler?

A) Tighten all intake and charge air cooler clamps and inspect for visible damage

C) Clean the engine air filter

B) Replace the turbocharger with a new unit

D) Replace the engine oil and filter

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5. Possible Cause: Boost Control Issues

Question: What boost control issue could lead to a decrease in boost pressure in a turbocharged engine?

D) A clogged fuel filter

A) A faulty wastegate or boost control valve

C) A broken starter motor

B) A failing battery

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4. Blocked or Restricted Intake Pipe or Manifold

Question: What is a simple maintenance task to address a blocked or restricted intake pipe or manifold?

A) Inspect and clean the intake pipe and manifold to remove any obstructions

B) Replace the intake manifold with a new one

C) Adjust the fuel injection timing

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2. Malfunctioning Turbocharger or Worn Turbine Blades

Question: What is a basic maintenance routine that could help with a malfunctioning turbocharger or worn turbine blades?

C) Adjust the engine's fuel mixture

A) Check and clean the turbocharger air intake and exhaust areas

B) Replace the turbocharger with a new unit

D) Change the engine's spark plugs

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5. Faulty Wastegate or Boost Control Valve

Question: What routine maintenance can be performed to address a faulty wastegate or boost control valve?

D) Change the engine coolant

B) Replace the wastegate or boost control valve with a new one

C) Adjust the engine's air-fuel ratio

A) Inspect and clean the wastegate and boost control valve, and check for proper operation

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1. Possible Cause: Air Leak

Question: What is one possible cause of reduced boost pressure at the inlet manifold in a turbocharged engine fitted with a charge air cooler?

D) Excessive engine oil consumption

B) An air leak in the intake system or charge air cooler

A) A clogged air filter

C) A faulty fuel injector

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4. Possible Cause: Intake System Blockage

Question: What is a potential cause of reduced boost pressure if there is a blockage in the intake system?

B) A leaking radiator hose

C) A broken exhaust manifold

A) A blocked or restricted intake pipe or manifold

D) A malfunctioning alternator

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3. Damaged or Clogged Charge Air Cooler

Question: What is an economical maintenance routine to address a damaged or clogged charge air cooler?

D) Flush the engine cooling system

B) Replace the entire intake manifold

A) Inspect and clean the charge air cooler, and replace it if necessary

C) Adjust the engine timing

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3. Possible Cause: Charge Air Cooler Issues

Question: Which issue related to the charge air cooler could cause a decrease in boost pressure?

D) A worn-out timing belt

C) A malfunctioning thermostat

B) An overfilled fuel tank

A) A damaged or clogged charge air cooler

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2. Possible Cause: Turbocharger Failure

Question: What could be a reason for a reduction in boost pressure over time in a turbocharged engine?

D) A malfunctioning air conditioning system

C) An incorrect engine timing setting

B) A faulty ignition system

A) A malfunctioning turbocharger or worn turbine blades

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