MDE 4 Q7

1 / 10

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

D) Change the engine's spark plugs

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

B) Replace the turbocharger with a new unit

2 / 10

3. Damaged or Clogged Charge Air Cooler

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

B) Replace the entire intake manifold

C) Adjust the engine timing

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

D) Flush the engine cooling system

3 / 10

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. Possible Cause: Turbocharger Failure

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

A) A malfunctioning turbocharger or worn turbine blades

D) A malfunctioning air conditioning system

B) A faulty ignition system

C) An incorrect engine timing setting

5 / 10

5. Possible Cause: Boost Control Issues

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

C) A broken starter motor

D) A clogged fuel filter

A) A faulty wastegate or boost control valve

B) A failing battery

6 / 10

5. Faulty Wastegate or Boost Control Valve

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

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

C) Adjust the engine's air-fuel ratio

D) Change the engine coolant

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

7 / 10

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

8 / 10

3. Possible Cause: Charge Air Cooler Issues

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

C) A malfunctioning thermostat

A) A damaged or clogged charge air cooler

D) A worn-out timing belt

B) An overfilled fuel tank

9 / 10

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

A) A blocked or restricted intake pipe or manifold

C) A broken exhaust manifold

D) A malfunctioning alternator

10 / 10

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?

C) Clean the engine air filter

D) Replace the engine oil and filter

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

B) Replace the turbocharger with a new unit

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