A1 ASE TEST QUESTIONS AND ANSWERS
If an engine experiences a sharp, metallic rapping noise only when it is idling, the
trouble could be worn:
`Main bearings
`Piston pins
`connecting rod bearings
`piston skirts - Answers -Piston pins
On a port fuel-injected engine, the cause of excessive black smoke in the exhaust could
be:
`low fuel pressure
`an intake manifold vacuum leak
`high oxygen sensor voltage
`high fuel pressure - Answers -High fuel pressure
During a cylinder power balance test on a four-cylinder port fuel-injected engine, one
cylinder has a 75-rpm drop and the other cylinders have a 125-rpm drop. Technician A
says that the cylinder with a 75-rpm drop may have a burned exhaust valve. Technician
B says that the cylinder with the 75-rpm drop may have a bad fuel injector. Who is
correct?
A only
B only
Both A and B
Neither A nor B - Answers -Both A and B
While discussing cylinder head service, Technician A says that torque-to-yield bolts may
be reused if they are not damaged. Technician B says that torque-to-yield bolts are
usually tightened to a specific torque and then rotated a certain number of degrees.
Who is correct?
A only
B only
Both A and B
Neither A nor B - Answers -B only
The cause of excessive valve stem height could be:
`An improperly installed valve guide
`excessive material machined from the head surface
`a worn valve guide and stem
, `excessive material removed from the valve seat - Answers -excessive material
removed from the valve seat
While diagnosing an engines timing belt condition, Technician A says that some vehicle
manufacturers recommend checking timing belt wear by measuring the installed length
of the belt tensioner. Technician B says that on some engines the valves will strike the
top of the pistons if the timing belt jump breaks. Who is correct?
A only
B only
Both A and B
Neither A nor B - Answers -Both A and B
While discussing engine sealants, Technician A says that RTV sealer dries in the
absence of air. Technician B says that anaerobic sealer dries in the absence of air. Who
is correct?
A only
B only
Both A and B
Neither A nor B - Answers -B only
While measuring cylinder taper and out-of-round, Technician A says that the cylinder
diameter should be measured at two vertical locations. Technician B says that cylinder
our-of-round is the difference between the cylinder diameter in the thrust and axial
directions. Who is correct?
A only
B only
Both A and B
Neither A nor B - Answers -B only
A longitudinally mounted V6 engine has cylinders 1, 3 and 5 on the side of the engine
next to the firewall, and cylinders 2, 4, and 6 on the side next to the radiator. A
compression test indicates cylinders 3 and 5 have 55 psi compression and all the other
cylinders have 140 psi compression. The most likely cause of this problem is:
`A burned exhaust valves in cylinders 3 and 5
`A leaking head gasket between cylinders 3 and 5
`Worn rings on cylinders 3 and 5
`Worn valve guides and seals in cylinders 3 and 5 - Answers -A leaking head gasket
between cylinders 3 and 5
An engine has excessive oil consumption and the exhaust contains blue smoke
especially during deceleration. Tech A recommends checking the valve stem-to-guide
If an engine experiences a sharp, metallic rapping noise only when it is idling, the
trouble could be worn:
`Main bearings
`Piston pins
`connecting rod bearings
`piston skirts - Answers -Piston pins
On a port fuel-injected engine, the cause of excessive black smoke in the exhaust could
be:
`low fuel pressure
`an intake manifold vacuum leak
`high oxygen sensor voltage
`high fuel pressure - Answers -High fuel pressure
During a cylinder power balance test on a four-cylinder port fuel-injected engine, one
cylinder has a 75-rpm drop and the other cylinders have a 125-rpm drop. Technician A
says that the cylinder with a 75-rpm drop may have a burned exhaust valve. Technician
B says that the cylinder with the 75-rpm drop may have a bad fuel injector. Who is
correct?
A only
B only
Both A and B
Neither A nor B - Answers -Both A and B
While discussing cylinder head service, Technician A says that torque-to-yield bolts may
be reused if they are not damaged. Technician B says that torque-to-yield bolts are
usually tightened to a specific torque and then rotated a certain number of degrees.
Who is correct?
A only
B only
Both A and B
Neither A nor B - Answers -B only
The cause of excessive valve stem height could be:
`An improperly installed valve guide
`excessive material machined from the head surface
`a worn valve guide and stem
, `excessive material removed from the valve seat - Answers -excessive material
removed from the valve seat
While diagnosing an engines timing belt condition, Technician A says that some vehicle
manufacturers recommend checking timing belt wear by measuring the installed length
of the belt tensioner. Technician B says that on some engines the valves will strike the
top of the pistons if the timing belt jump breaks. Who is correct?
A only
B only
Both A and B
Neither A nor B - Answers -Both A and B
While discussing engine sealants, Technician A says that RTV sealer dries in the
absence of air. Technician B says that anaerobic sealer dries in the absence of air. Who
is correct?
A only
B only
Both A and B
Neither A nor B - Answers -B only
While measuring cylinder taper and out-of-round, Technician A says that the cylinder
diameter should be measured at two vertical locations. Technician B says that cylinder
our-of-round is the difference between the cylinder diameter in the thrust and axial
directions. Who is correct?
A only
B only
Both A and B
Neither A nor B - Answers -B only
A longitudinally mounted V6 engine has cylinders 1, 3 and 5 on the side of the engine
next to the firewall, and cylinders 2, 4, and 6 on the side next to the radiator. A
compression test indicates cylinders 3 and 5 have 55 psi compression and all the other
cylinders have 140 psi compression. The most likely cause of this problem is:
`A burned exhaust valves in cylinders 3 and 5
`A leaking head gasket between cylinders 3 and 5
`Worn rings on cylinders 3 and 5
`Worn valve guides and seals in cylinders 3 and 5 - Answers -A leaking head gasket
between cylinders 3 and 5
An engine has excessive oil consumption and the exhaust contains blue smoke
especially during deceleration. Tech A recommends checking the valve stem-to-guide
