Breaker Point Diagnostics Practice Test

These questions are part of the practice quiz. Start practicing

• Dwell is measured in which unit?
• The dwell section in the oscilloscope pattern represents which time interval?
• Which term corresponds to Intermediate Oscillations?
• What is a notable practical advantage of digital oscilloscopes described in the material?
• Which outcome describes the impact of an incorrect condenser capacity on breaker points?
• Which built-in component enables digitization in a digital oscilloscope?
• For what purpose is a dwell tachometer used?
• What unit is used to express dwell in the oscilloscope pattern?
• What is the expected voltage drop across the breaker points when they are closed?
• What voltage does the ignition coil require to operate?
• Which segment is the Spark Line?
• What should you inspect on the coil assembly besides mounting?
• Where is the breaker points assembly located in a traditional distributor?
• Worn breaker points are defined by which behavior?
• What is the primary function of an automotive oscilloscope?
• Why is carbon tracking inside the distributor cap problematic?
• After the spark occurs, how many oscillations should be visible in the intermediate section if the system is functioning normally?
• Which terminal pair is used when measuring ignition wiring resistance with a DMM?
• What does a dwell meter help you verify?
• What is the distributor cam's primary function?
• What happens if breaker points become excessively worn?
• If the ignition coil voltage test using a DMM shows a value other than 12 volts, which components should be inspected?
• On the oscilloscope trace, where is the firing line located when the spark fires?
• What is required for the ground connection to be effective?
• Which diagnostic step helps identify ignition problems at regular maintenance?
• Which additional capability can a digital oscilloscope perform?
• Before using a dwell meter, what should you verify?
• Which of the following patterns is associated with a shorted ignition coil on the oscilloscope?
• Which voltage range represents the firing line height typically seen on the oscilloscope during normal ignition operation?
• Which oscilloscope segment corresponds to Zero Line?
• Which reading indicates an unwanted resistance in the breaker point contacts?
• What is the function of the breaker points as the distributor cam lobes pass under the rubbing block?
• Which finding on ignition wiring indicates a potential insulation fault that could cause misfire?
• What does the adjusting screw change in a breaker point distributor?
• Which name corresponds to Points Open?
• What event occurs when the breaker points close in the ignition system?
• Which term is the Zero Line?
• Where is the condenser typically mounted?
• Which oscilloscope segment is labeled Dwell?
• Which segment is Coil Change Oscillations?
• When testing the primary ignition coil resistance with a DMM, which connection scheme is used?
• Which of the following is a listed condition to inspect for ignition wiring during visual inspection?
• Which statement best describes DMM diagnostics for ignition systems?
• Which term describes Intermediate Oscillations?
• Where should the ground lead be connected for proper oscilloscope grounding?
• What condition causes breaker points to transfer material to each other?
• What would indicate excessive wear on distributor cap contact button?
• Where should the secondary inductive lead be placed?
• Which statement best describes an analog oscilloscope?
• When checking available voltage at the breaker points, a value other than 12 volts indicates problems with which components?
• What indicates misalignment of breaker points?
• The connection to the coil is where the circuit from which component connects to the distributor?
• Which segment is associated with Dwell period?
• What does a dwell tachometer measure?
• Misaligned breaker points are indicated by which symptom?
• Where is the rubbing block mounted in the ignition system?
• What is the proper relationship between the spark line height and the firing line height on the oscilloscope under normal operation?
• What indicates pitting on breaker points?
• Which condition is NOT among common ignition wiring checks?
• Burned breaker points are caused by what condition?
• What pattern indicates damaged points (contaminated, dirty, pitted, or burned) on the oscilloscope trace?
• Which tool is used to diagnose faults in the vehicle among the following?
• Rotor inspection should identify which of the following as NOT a sign of damage?
• What is the normal resistance value for the ballast resistor?
• What information does the spark line convey in the oscilloscope pattern?
• Which segment is the Spark Line?
• Pitting on breaker points is indicated by which surface condition?
• On a dwell meter, which lead is connected to the negative terminal of the ignition coil?
• If the ignition wiring resistance is higher than expected, what does it indicate?
• Which term describes the segment named Points Open?
• Dwell angle specifications may vary between engines; which action should you take?
• What is the normal resistance of the ignition coil primary winding?
• During distributor cap inspection, which finding indicates carbon tracking?
• If the ballast resistor test shows resistance above specification or an open circuit, what should you do?
• During voltage drop verification, what reading is expected when the breaker points are open?
• When the rubbing block is pushed by the cam, what happens?
• Oil around windings on some ignition coils can indicate which condition?
• Which technician statements about dwell are correct?
• What does a longer horizontal line on the oscilloscope trace indicate?
• Which segment is associated with Firing Line?
• Where should the inductive trigger lead be placed to measure the ignition signal on an oscilloscope?
• Contaminated breaker points occur due to which contamination source?
• If dwell is out of specification, what should you do first?
• After adjusting breaker points, which parameter should be tested and adjusted if necessary?
• Which instrument is used to verify the gap between the breaker points?
• How many lobes does the distributor cam have in relation to engine cylinders?
• What does the condenser do in this system?
• What built-in component enables a digital oscilloscope to digitize signals?
• To verify breaker point continuity with a DMM, which two points are connected for the test?
• Which task is commonly performed with a digital multimeter during breaker point diagnostics?
• Where should the primary lead be placed when connecting the oscilloscope to the ignition system?
• What indicates contamination of breaker points?
• Where should the black dwell meter lead be connected?
• Which pattern represents Firing Line?
• Which pattern is most closely linked to Intermediate Oscillations?
• What is a consequence of worn breaker points?
• Which term matches Coil Change Oscillations?
• In an oscilloscope pattern, what pattern indicates a shorted spark plug wire?
• On an oscilloscope display, in which direction does time progress?
• When using the digital multimeter, what setting is used to test resistance and continuity?
• What is the primary purpose of visual inspection in a breaker point ignition system?
• What event marks the end of the dwell section in the oscilloscope pattern?
• Which symptom indicates burned breaker points?
• If the ignition coil is internally shorted, what happens to the oscillations in the intermediate section after the spark?
• Excessive metal transfer on breaker points is most likely caused by which condition?