Systems): Questions & Answers
1. The fault shown in the circuit (found on https://tinyurl.com/5djzyssf) is:
A. an open
B. a short to ground
C. too much capacitance
D. too much resistance - ANSWER:B. a short to ground
2. An airbag system is being serviced. Tech A says to disconnect the yellow SRS connectors at the front of
the vehicle. Tech B says to disconnect and isolate the negative battery cable. Who is right?
A. Tech A
B. Tech B
C. Both
D. Neither - ANSWER:B. Tech B
3. Which of these should be used when soldering electrical wiring connections?
A. rosin core flux
B. acid core flux
C. sulfur core flux
D. none of the above - ANSWER:A. rosin core flux
4. When testing computer-controlled systems, a digital multi-meter should be used with an input
impedance of at least:
A. 10k ohms
B. 100k ohms
C. 1 megohm
D. 10 megohms - ANSWER:D. 10 megohms
5. When troubleshooting a slow drain on the battery, which of these diagnostic tools should be used?
A. Ohmeter
B. ammeter
C. voltmeter
,D. Test light - ANSWER:B. ammeter
6. The condition of a lead-acid battery is being checked. Tech A says to use a galvanometer. Tech B says to
use a capacitive battery tester.
A. Tech A
B. Tech B
C. Both
D. Neither - ANSWER:B. Tech B
7. While testing a starting circuit on a 5.7 V8 engine, the Tech finds that the engine cranks slowly. The
starter current draw is 90 amps, and the battery voltage while cranking is 11 volts. What should the Tech
Do next?
A. Check for voltage drop of the starter motor circuit.
B. Test the battery capacity.
C. Replace the starter motor, as a short is indicated.
D. Determine the condition of the engine. - ANSWER:A. Check for voltage drop of the starter motor
circuit.
8. Tech A says that a noisy alternator could be caused by a bad diode. Tech B says that a noisy alternator
could be caused by a worn bearing. Who is right?
A. Tech A
B. Tech B
C. Both
D. Neither - ANSWER:C. Both
9. The analog ohmmeter needle does not move when connected as shown above (see
https://tinyurl.com/3kymcrvk. This means the rotor winding is:
A. Shorted
B. Grounded
C. Complete
D. Open - ANSWER:D. Open
10. A vehicle's turn signals flash too slowly. Tech A claims that the condition could be caused by a faulty
flasher. Tech B says that a bulb may be the wrong type. Who is right?
A. Tech A
B. Tech B
, C. Both
D. Neither - ANSWER:C. Both
11. Tech A says a short circuit to ground in a circuit will decrease resistance. Tech B says a short circuit
will increase current flow. Who is right?
A. Tech A
B. Tech B
C. Both
D. Neither - ANSWER:C. Both
12. The voltmeter in the circuit shown above (see https://tinyurl.com/24kyze57) reads 3.5 volts. Tech A
says that a bad ground for the light could be the cause. Tech B says that high resistance in the circuit
from the battery to the light could be the cause. Who is right?
A. Tech A
B. Tech B
C. Both
D. Neither - ANSWER:B. Tech B
13. When using a voltmeter to check for voltage in a circuit, the voltmeter should first be connected to
check for:
A. Source voltage.
B. excessive resistance
C. excessive amperage.
D. Good ground - ANSWER:A. Source voltage.
14. When checking the green eye of a sealed maintenance free battery, no color seen indicates that the
battery is:
A. undercharged
B. charged properly.
C. Overcharged.
D. Damaged. - ANSWER:A. undercharged
15. Both headlights on a vehicle are dim on high beam but are normal on low beam. Tech A says that a
poor headlight ground could be the cause. Tech B says that a shorted headlight switch could be the
cause. Who is right?
A. Tech A