A1 ASE Test Questions And Answers Latest Update All Correct Review Solution

A1 ASE Test Questions And Answers Latest Update All Correct Review Solution
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 - ANS-✔✔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 - ANS-✔✔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 - ANS-✔✔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 - ANS-✔✔B only