BMW MEMBER ASE EXAM
Questions with Answers| Latest Update| Guaranteed Pass
,1. Technician A says a compression test should be performed with the throttle
plate held wide open. Technician B says the battery should be fully charged
before performing a cranking compression test. Who is correct?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Answer: C
Rationale: A wide-open throttle allows maximum airflow into the cylinders for
an accurate reading, and a fully charged battery ensures adequate, consistent
cranking speed. Both conditions are necessary for an accurate compression test.
2. A BMW N20 engine has excessive oil consumption. Which component is a
common cause of this issue on turbocharged direct-injection engines?
A. Worn valve stem seals and piston rings
B. Faulty fuel injector wiring harness
C. Cracked windshield washer reservoir
D. Worn serpentine belt tensioner
Answer: A
Rationale: Worn valve stem seals and piston rings allow oil to enter the
combustion chamber and be burned, a well-documented cause of excessive oil
consumption in many direct-injection turbocharged engines, including some
BMW N-series engines.
3. What is the primary purpose of a VANOS system on a BMW engine?
A. To control variable valve timing
B. To regulate coolant flow
C. To control fuel pressure only
D. To operate the power steering pump
Answer: A
Rationale: VANOS (Variable Nockenwellen Steuerung) is BMW's variable valve
timing system, which adjusts camshaft timing to optimize performance, fuel
economy, and emissions across different engine speeds and loads.
4. A cylinder leakage test shows air escaping from the oil filler cap. This
indicates leakage past the:
, A. Intake valve
B. Exhaust valve
C. Piston rings
D. Head gasket
Answer: C
Rationale: Air escaping from the oil filler cap during a cylinder leakage test
indicates that compression is leaking past the piston rings into the crankcase.
5. Technician A says a timing chain that has stretched can cause a check engine
light with camshaft position codes. Technician B says timing chain stretch is
normal and requires no service. Who is correct?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Answer: A
Rationale: A stretched timing chain alters valve timing relative to crankshaft
position, which can trigger camshaft/crankshaft correlation codes. Chain
stretch beyond specification is not normal and requires replacement.
6. What tool is used to accurately measure cylinder bore diameter and taper?
A. Feeler gauge
B. Dial bore gauge
C. Torque wrench
D. Micrometer for external threads only
Answer: B
Rationale: A dial bore gauge is designed specifically to measure the internal
diameter of a cylinder bore at multiple points, allowing the technician to detect
taper and out-of-round wear.
7. A knocking noise from a BMW inline-six engine that increases with engine
speed and load could most likely indicate:
A. Worn connecting rod bearings
B. A loose radiator cap
C. Low washer fluid
, D. A faulty cabin air filter
Answer: A
Rationale: Worn connecting rod bearings typically produce a knocking sound
that becomes more pronounced as engine speed and load increase, due to
increased clearance between the bearing and crankshaft journal.
8. What is the purpose of a head gasket?
A. Seal the combustion chamber, coolant, and oil passages between the block
and head
B. Regulate fuel pressure
C. Control ignition timing
D. Filter incoming air
Answer: A
Rationale: The head gasket seals the mating surfaces between the engine
block and cylinder head, preventing leakage of combustion gases, coolant, and
oil between passages.
9. Technician A says a blown head gasket can cause coolant to appear in the
engine oil. Technician B says a blown head gasket can cause white exhaust
smoke. Who is correct?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Answer: C
Rationale: A head gasket failure can allow coolant to mix with oil (causing a
milky appearance) and can allow coolant to enter the combustion chamber,
producing white smoke from the exhaust as it burns.
10. On a BMW engine equipped with Valvetronic, the primary function of this
system is to:
A. Eliminate the need for a throttle plate by varying valve lift
B. Increase turbocharger boost pressure
C. Control transmission shift points
D. Cool the exhaust gases
Questions with Answers| Latest Update| Guaranteed Pass
,1. Technician A says a compression test should be performed with the throttle
plate held wide open. Technician B says the battery should be fully charged
before performing a cranking compression test. Who is correct?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Answer: C
Rationale: A wide-open throttle allows maximum airflow into the cylinders for
an accurate reading, and a fully charged battery ensures adequate, consistent
cranking speed. Both conditions are necessary for an accurate compression test.
2. A BMW N20 engine has excessive oil consumption. Which component is a
common cause of this issue on turbocharged direct-injection engines?
A. Worn valve stem seals and piston rings
B. Faulty fuel injector wiring harness
C. Cracked windshield washer reservoir
D. Worn serpentine belt tensioner
Answer: A
Rationale: Worn valve stem seals and piston rings allow oil to enter the
combustion chamber and be burned, a well-documented cause of excessive oil
consumption in many direct-injection turbocharged engines, including some
BMW N-series engines.
3. What is the primary purpose of a VANOS system on a BMW engine?
A. To control variable valve timing
B. To regulate coolant flow
C. To control fuel pressure only
D. To operate the power steering pump
Answer: A
Rationale: VANOS (Variable Nockenwellen Steuerung) is BMW's variable valve
timing system, which adjusts camshaft timing to optimize performance, fuel
economy, and emissions across different engine speeds and loads.
4. A cylinder leakage test shows air escaping from the oil filler cap. This
indicates leakage past the:
, A. Intake valve
B. Exhaust valve
C. Piston rings
D. Head gasket
Answer: C
Rationale: Air escaping from the oil filler cap during a cylinder leakage test
indicates that compression is leaking past the piston rings into the crankcase.
5. Technician A says a timing chain that has stretched can cause a check engine
light with camshaft position codes. Technician B says timing chain stretch is
normal and requires no service. Who is correct?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Answer: A
Rationale: A stretched timing chain alters valve timing relative to crankshaft
position, which can trigger camshaft/crankshaft correlation codes. Chain
stretch beyond specification is not normal and requires replacement.
6. What tool is used to accurately measure cylinder bore diameter and taper?
A. Feeler gauge
B. Dial bore gauge
C. Torque wrench
D. Micrometer for external threads only
Answer: B
Rationale: A dial bore gauge is designed specifically to measure the internal
diameter of a cylinder bore at multiple points, allowing the technician to detect
taper and out-of-round wear.
7. A knocking noise from a BMW inline-six engine that increases with engine
speed and load could most likely indicate:
A. Worn connecting rod bearings
B. A loose radiator cap
C. Low washer fluid
, D. A faulty cabin air filter
Answer: A
Rationale: Worn connecting rod bearings typically produce a knocking sound
that becomes more pronounced as engine speed and load increase, due to
increased clearance between the bearing and crankshaft journal.
8. What is the purpose of a head gasket?
A. Seal the combustion chamber, coolant, and oil passages between the block
and head
B. Regulate fuel pressure
C. Control ignition timing
D. Filter incoming air
Answer: A
Rationale: The head gasket seals the mating surfaces between the engine
block and cylinder head, preventing leakage of combustion gases, coolant, and
oil between passages.
9. Technician A says a blown head gasket can cause coolant to appear in the
engine oil. Technician B says a blown head gasket can cause white exhaust
smoke. Who is correct?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Answer: C
Rationale: A head gasket failure can allow coolant to mix with oil (causing a
milky appearance) and can allow coolant to enter the combustion chamber,
producing white smoke from the exhaust as it burns.
10. On a BMW engine equipped with Valvetronic, the primary function of this
system is to:
A. Eliminate the need for a throttle plate by varying valve lift
B. Increase turbocharger boost pressure
C. Control transmission shift points
D. Cool the exhaust gases
