Drive trains review

A smoothly operating engine depends on _______________.

• High compression on most cylinders

• Equal compression between cylinders

• Cylinder compression levels above 100psi and within 70psi of each other

• Compression levels below 100psi on most cylinders

A good reading for a cylinder leakage test should be _________ .

• Within 20% between cylinders

• All cylinders below 20% leakage

• All cylinders above 20% leakage

• All cylinders above 70% leakage and within 7% of each other

Technician A says that during a power balance test , the cylinder that causes the bigest RPM drop is the weak cylinder. Technician B says that if one spark plug wire is grounded out and the engine speed does not drop, a weak or dead cylinder is indicated. Which technician is corrrect ?

• Technician A only

• Technician B only

• Both technician A and B

• Neither technician A nor B

A technician is proceeding a leak down test on a vehicle, bubles are observes in the radiator. What could be the cause of the engine problem ?

• Leakage of the thermostat

• Intake valve leakage

• Exhaust valve leakage

• Head gasket leakage

• All of the above

The low oil pressure warning light usually comes on ________.

• Whenever an oil change is required

• Whenever the oil filter bypass valve opens

• Whenever oil pressure drops low (ie; 4 to 7 psi)

• Whenever the oil filter pressure relief valve opens

• All ofthe above

How is a battery drain test performed ?

• Use of a voltmeter in series with the negative battery terminal and the disconnected negative battery cable end

• Use of an ameter in parallel with the negative battery terminal and the disconnected negative battery cable end

• Use of an ameter in series with the negative battery terminal and the disconnected negative battery cable end

• Use of an voltmeter in parallel with the negative battery terminal and the disconnected negative battery cable end

When load testing a battery, which battery rating is often used to determine how much load to apply to the battery ?

• CA

• RC

• MCA

• CCA

A battery high-rate discharge (load capacity) test is being performed on a 12-volt battery. Technician A says that a good battery should have a voltage readingof 9.6 volts while under load at the end of the 15 second test. Technician B says that the battery should be discharged (loaded) to twice it CCA rating. Which technician is correct ?

• Technician A only

• Technician B only

• Both technician A and B

• Neither technician A nor B

Normal battery drain (parasitic drain) with a vehicle with many computer and electronic circuit is __________.

• 2 to 3 milliamps

• 150 to 300 milliamps

• 20 to 30 milliamps

• None of the above

When jump starting a vehicle, _______________.

• The last connection should be the positive post of the dead batterry

• The last connection should be the engine block of the dead vehicle

• The alternator must be disconnected on the dead vehicle

• Both A and C are correct