ASE A1 (Engine Repair) Practice Test -
Cumulative
a heavy thumping noise occurs with the engine idling, but the oil pressure is normal. this may be caused
by:
worn pistons and cylinders,
loose flywheel bolts,
worm main bearings,
loose camshaft bearings, - loose flywheel bolts
-worn pistons and cylinders would cause a thumping noise during acceleration
-worn main bearings cause a thump when the engine is started
-loose camshaft bearings would cause a growling noise at all times
a low, steady vacuum gauge reading from 11 to 15 indicates:
burned or leaking valves
late ignition timing
weak valve springs
leaking head gasket - late ignition timing
-burned or leaking valves cause a fluctuation between 12 and 18
-weak valve springs cause a fluctuation between 10 and 25
-leaking head gasket would cause a fluctuation between 7 and 20
,a battery rated at 600 CCA is load tested at 1/2 its rated CCA for 15 seconds. the results show 10.1 volts.
the results indicate that this battery:
is satisfactory
needs recharging
is bad and should be replaced
should be retested at load for 30 seconds - is satisfactory
a bent connecting rod may cause
uneven connecting rod bearing wear
uneven main bearing wear
uneven piston pin wear
excessive cam bearing wear - uneven connecting rod bearing war
all others are not causes of a bent connecting rod
A bent valve spring must be replaced if it has a spring height variance of more than
0.005 inch
0.0625 inch
0.125 inch
0.025 inch - 0.125 inch
0.125 is beyond spec
0.005, 0.0625, 0.025 is within spec.
a collapsed cooling system hose may be an indication of a:
,damaged radiator cap sealing gasket
damaged radiator filler neck seat
damaged expansion tank
damaged radiator cap vacuum valve - damaged radiator cap vacuum valve
a cooling system is being checked with a pressure tester. the gauge pressure rises when the engine is
started.
A says this could be caused by a crack in the combustion chamber.
B says this could be caused by clogged tubes in the radiator
A
B
Both
Neither - A
a clogged radiator would not cause this
a crank journal is being measured in the same direction at opposite ends. this is measuring for:
taper
out-of-roundness
wear
bearing size - taper
~crank journal taper is measured in the same direction at opposite ends
a cylinder balance test is being performed on an engine to determine which cylinder is causing a miss.
Tech A says that when the faulty cylinder is disabled, engine rpm will drop more than for the other
cylinders.
, Tech B says disabling the faulty cylinder will cause the engine to stall
A,
B,
Both,
Neither, - Neither
the faulty cylinder will not cause the engine to stall, neither will it cause the engine to drop in RPM since
it is faulty.
a cylinder balance test on a carbureted engine has revealed one cylinder is contributing less power than
the others. The LEAST likely cause of this is:
faulty ignition system
burned exhaust valve
faulty carburetor
leaking intake manifold - faulty carburetor
-faulty ignition system, burned exhaust valve, and leaking intake manifold are likely to cause one cylinder
to provide less power than others. The carburetor would not cause one single cylinder to contribute less
power.
a cylinder block deck is being measured for warpage.
A says that if the manufacturer does not provide a warpage limit spec, warpage under 0.005 inch is
acceptable.
B says if warpage exceeds 0.001 inch the block must be resurfaced
A
B
Both
Cumulative
a heavy thumping noise occurs with the engine idling, but the oil pressure is normal. this may be caused
by:
worn pistons and cylinders,
loose flywheel bolts,
worm main bearings,
loose camshaft bearings, - loose flywheel bolts
-worn pistons and cylinders would cause a thumping noise during acceleration
-worn main bearings cause a thump when the engine is started
-loose camshaft bearings would cause a growling noise at all times
a low, steady vacuum gauge reading from 11 to 15 indicates:
burned or leaking valves
late ignition timing
weak valve springs
leaking head gasket - late ignition timing
-burned or leaking valves cause a fluctuation between 12 and 18
-weak valve springs cause a fluctuation between 10 and 25
-leaking head gasket would cause a fluctuation between 7 and 20
,a battery rated at 600 CCA is load tested at 1/2 its rated CCA for 15 seconds. the results show 10.1 volts.
the results indicate that this battery:
is satisfactory
needs recharging
is bad and should be replaced
should be retested at load for 30 seconds - is satisfactory
a bent connecting rod may cause
uneven connecting rod bearing wear
uneven main bearing wear
uneven piston pin wear
excessive cam bearing wear - uneven connecting rod bearing war
all others are not causes of a bent connecting rod
A bent valve spring must be replaced if it has a spring height variance of more than
0.005 inch
0.0625 inch
0.125 inch
0.025 inch - 0.125 inch
0.125 is beyond spec
0.005, 0.0625, 0.025 is within spec.
a collapsed cooling system hose may be an indication of a:
,damaged radiator cap sealing gasket
damaged radiator filler neck seat
damaged expansion tank
damaged radiator cap vacuum valve - damaged radiator cap vacuum valve
a cooling system is being checked with a pressure tester. the gauge pressure rises when the engine is
started.
A says this could be caused by a crack in the combustion chamber.
B says this could be caused by clogged tubes in the radiator
A
B
Both
Neither - A
a clogged radiator would not cause this
a crank journal is being measured in the same direction at opposite ends. this is measuring for:
taper
out-of-roundness
wear
bearing size - taper
~crank journal taper is measured in the same direction at opposite ends
a cylinder balance test is being performed on an engine to determine which cylinder is causing a miss.
Tech A says that when the faulty cylinder is disabled, engine rpm will drop more than for the other
cylinders.
, Tech B says disabling the faulty cylinder will cause the engine to stall
A,
B,
Both,
Neither, - Neither
the faulty cylinder will not cause the engine to stall, neither will it cause the engine to drop in RPM since
it is faulty.
a cylinder balance test on a carbureted engine has revealed one cylinder is contributing less power than
the others. The LEAST likely cause of this is:
faulty ignition system
burned exhaust valve
faulty carburetor
leaking intake manifold - faulty carburetor
-faulty ignition system, burned exhaust valve, and leaking intake manifold are likely to cause one cylinder
to provide less power than others. The carburetor would not cause one single cylinder to contribute less
power.
a cylinder block deck is being measured for warpage.
A says that if the manufacturer does not provide a warpage limit spec, warpage under 0.005 inch is
acceptable.
B says if warpage exceeds 0.001 inch the block must be resurfaced
A
B
Both
