Diesel Tech ASE Practice Test 5
Electrical/Electronic Systems Questions
And Answers With Verified Solutions
Already Passed!!!
All of the following conditions can cause reduced current flow in an electrical
circuit EXCEPT:
A. Loose terminal connections
B. Hot-side wire rubbing a metal component
C. Corrosion inside the wire insulation
D. A wire that is too small - ANSWER✔✔B. Hot-side wire rubbing a metal
component
An electric fan on a late-model truck can be energized by which of the following
methods?
A. Viscous fluid switch
B. Hot-side wire rubbing a metal component
C. Corrosion inside the wire insulation
D. A wire that is too small - ANSWER✔✔C. Corrosion inside the wire insulation
Technician A says that a circuit with corrosion in the wiring will create a short
circuit. Technician B says that a power wire that rubs a metal surface for a long
period of time could crate a short to ground. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - ANSWER✔✔B. B only
All of the following problems could cause excessive key-off battery drain
EXCEPT:
A. Inverter switch stuck on
B. Broken wire near the dome light socket
C. Map light switch stuck closed
D. Faulty rectifier bridge in the alternator - ANSWER✔✔B. Broken wire near the
dome light socket
, Which of the following devices would LEAST LIKELY be used as a circuit
protection device?
A. Maxi-fuse
B. Circuit breaker
C. Relay
D. Positive temperature coefficient (PTC) thermistor - ANSWER✔✔C. Relay
Technician A says that a loose drive belt could cause undercharging. Technician B
says that undersized wiring between the alternator and the battery could cause
undercharging. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - ANSWER✔✔C. Both A and B
Technician A says that a blown ignition fuse can cause low cranking voltage.
Technician B says that a weak battery can cause low cranking voltage. Who is
correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - ANSWER✔✔B. B only
A wiring schematic is being used to diagnose a truck electrical problem.
Technician A says that most schematics show the wire colors of the wires.
Technician B says that most schematics are drawn with power coming from the top
of the picture? Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - ANSWER✔✔D. Neither A nor B
When diagnosing a repeated flasher failure. Technician A says that a 100 millivolt
voltage drop problem may be the cause. Technician B says that proper grounding
of the trailer sockets may correct the problem. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - ANSWER✔✔C. Both A and B
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