Engine Repair (A1)

14.All of the following statements about a battery load test are true EXCEPT:

A. The battery should be discharged at one-half the cold cranking rating duringthe test. B. The battery temperature should be above 40°F before performing the test. C. The battery's specific gravity should be above 1,190 before performing the test. D. The battery is satisfactory if the voltage remains above 8.8 V after fifteen secondswith the battery temperature at 70°F. All true except D.

3. 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 a 75-rpm drop may have a bad fuel injector. Who is correct?

Both A and B technicians

6. While diagnosing an engine's timing belt condition, Technician A says that somevehicle 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?

Both A and B technicians

10. A cooling system is pressurized to 15 psi with a pressure tester. After five minutes, thepressure reading on the tester is 3 psi, and there are no external leaks. Technician A says that the automatic transmission cooler may be leaking. Technician B says that the head gasket may be leaking. Who is correct?

Both technicians A and B

5. The cause of excessive valve stem height could be: A. an improperly installed valve guide.

Excessive material removed from the valve seat.

11. An engine no-start condition is being diagnosed. A 12-volt test light connected fromthe coil's negative primary terminal to ground flashes while cranking the engine. The most likely cause for the no-start condition is a faulty:

Faulty Ignition Coil

13. An accumulation of oil in the air cleaner may be caused by a:

Partially restricted pvc valve

1. If an engine experiences a sharp, metallic rapping noise only when it is idling, thetrouble could be worn: A. main bearings.

Piston pins

12. Technician A says that an intake manifold vacuum leak may cause cylinder misfiring at idle speed. Technician B says that an intake manifold vacuum leak may cause cylinder misfiring at 2,500 rpm. Who is correct?

Technician A

4. While discussing cylinder head service, Technician A says that torque-to-yield boltsmay be reused if they are not damaged. Technician B says that torque-to-yield bolts are usually tightened to a specified torque and then rotated a certain number of degrees. Who is correct?

Technician B

8. 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 out-of-round is the difference between the cylinder diameter in the thrust and axial directions. Who is correct?

Technician B

9. Technician A says that when checking connecting rods, they should be measuredto determine if they are bent. Technician B says that each connecting rod should be measured for a twisted condition. Who is correct?

Technician B

7. 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?

Technician B is correct

2. On a port fuel-injected engine, the cause of excessive black smoke in the exhaustcould be:

high fuel pressure