ASE A1 (ENGINE REPAIR) PRACTICE
TEST – CUMULATIVE PRACTICE
EXAMINATION 2026 QUESTIONS
WITH ANSWERS GRADED A+
◍ What is excessive cylinder leakage?.
Answer: 20% or greater is excessive
◍ Air from tail pipe during leakage test.
Answer: Bad exhaust valve test
◍ Heating a wrist pin will....
Answer: It will expand and not fit into rod.
◍ Low oil pressure causes.
Answer: Worn main bearings or a clogged oil pickup screen.
◍ Least critical measurement during engine overhaul.
Answer: Valve cover torque.
◍ Causes of white exhaust smoke.
Answer: Worn valve guide seals, cracked cylinder head, or blown head
gasket.
◍ Connecting rod bearings measurement.
Answer: Should be measured with Plastigage.
◍ Cylinder compression checking conditions.
Answer: Engine at operating temperature, throttle wide open, and all spark
plugs removed.
◍ Causes of knocking noise in engine.
Answer: Excessive piston-to-wall clearance, worn rod bearings, or excessive
, crankshaft end play.
◍ moderately loose alternator belt.
Answer: causes squealing while accelerating
◍ Cylinder head warpage check.
Answer: Should be checked in multiple directions.
◍ Excessive oil consumption causes.
Answer: Worn valve guides, stuck oil rings, or worn cylinder walls.
◍ manifold heat control valve.
Answer: forces hot exhaust gases up around the base of the carburetor and
intake manifold to warm the fuel-air mixture
◍ Most accurate method for measuring main bearing clearance.
Answer: Plastigage.
◍ Low compression reading causes.
Answer: Worn piston rings, burned valves, or cracked cylinder head.
◍ oil cooler.
Answer: prevents excessive heat and oxidization of oil
◍ Timing chain stretch effect.
Answer: Can cause retarded valve timing.
◍ Least critical step during engine assembly.
Answer: Painting timing cover.
◍ intake manifold vacuum leak.
Answer: causes misfire at idle
◍ Oil in coolant causes.
Answer: Cracked block, failed head gasket, or cracked cylinder head.
◍ Excessive valve spring height.
Answer: causes valve float
◍ Camshaft lobe wear measurement.
TEST – CUMULATIVE PRACTICE
EXAMINATION 2026 QUESTIONS
WITH ANSWERS GRADED A+
◍ What is excessive cylinder leakage?.
Answer: 20% or greater is excessive
◍ Air from tail pipe during leakage test.
Answer: Bad exhaust valve test
◍ Heating a wrist pin will....
Answer: It will expand and not fit into rod.
◍ Low oil pressure causes.
Answer: Worn main bearings or a clogged oil pickup screen.
◍ Least critical measurement during engine overhaul.
Answer: Valve cover torque.
◍ Causes of white exhaust smoke.
Answer: Worn valve guide seals, cracked cylinder head, or blown head
gasket.
◍ Connecting rod bearings measurement.
Answer: Should be measured with Plastigage.
◍ Cylinder compression checking conditions.
Answer: Engine at operating temperature, throttle wide open, and all spark
plugs removed.
◍ Causes of knocking noise in engine.
Answer: Excessive piston-to-wall clearance, worn rod bearings, or excessive
, crankshaft end play.
◍ moderately loose alternator belt.
Answer: causes squealing while accelerating
◍ Cylinder head warpage check.
Answer: Should be checked in multiple directions.
◍ Excessive oil consumption causes.
Answer: Worn valve guides, stuck oil rings, or worn cylinder walls.
◍ manifold heat control valve.
Answer: forces hot exhaust gases up around the base of the carburetor and
intake manifold to warm the fuel-air mixture
◍ Most accurate method for measuring main bearing clearance.
Answer: Plastigage.
◍ Low compression reading causes.
Answer: Worn piston rings, burned valves, or cracked cylinder head.
◍ oil cooler.
Answer: prevents excessive heat and oxidization of oil
◍ Timing chain stretch effect.
Answer: Can cause retarded valve timing.
◍ Least critical step during engine assembly.
Answer: Painting timing cover.
◍ intake manifold vacuum leak.
Answer: causes misfire at idle
◍ Oil in coolant causes.
Answer: Cracked block, failed head gasket, or cracked cylinder head.
◍ Excessive valve spring height.
Answer: causes valve float
◍ Camshaft lobe wear measurement.
