ABYC ELECTRICAL 2025 EXAM QUESTIONS
WITH ANSWERS.
1. Tech A says that generator AC conductors must be tightly secured to
avoid vibration and movement from the generator set. Tech B says that
the generators AC wiring must be protected from chafing and strain.
Who is right?
A. Tech A
B. Tech B
C. Both Techs
D. Neither Tech - correct answer -C. Both
2. The AC output conductors of an AC generator, tha is not self liming,
shall be provided with over current protection within:
A. 7"
B. 40" if properly sheathed
C. 72"
D. A and B - correct answer -D. A and B
3. Technician A says that when the sensor wire from the oil pressure
gauge is grounded the gauge needle moves to the right, showing full
pressure. THe most likely problem is:
A. Low oil pressure
B. A shorted wire
C. A bad sensing unit
D. A bad gauge - correct answer -C. A bad sensing unit
,4. To test the voltage drop to the cranking motor, connect the volt meter
leads:
A. In series with the battery
B. To the neg battery post and the negative cable termination at the
engine while cranking the engine
C. To the positive battery post and the positive cable
termination at the engine while cranking the engine
D. Both B and C - correct answer -D. Both B and C
5. According to ABYC, the minimum conductor size of the primary conductor
in a lightning protection system is:
A. 8 AWG
B. 6 AWG
C. 4 AWG
D. 0000 AWG - correct answer -C. 4 AWG
6. A customer complains that certain electronic components (fed from a
panel board) malfunction during engine cranking. Probable causes are all
of the following except:
A. Undersized conductor feeding the panelboard
B. Faulty battery switch
C. Undersized cranking battery
D. Undersized DC grounding conductor - correct answer -B. Faulty
battery switch
7. Tech A says that DC negative bus bars that are mounted to a metal
, panelboard must be insulated form the metal enclosure. Tech B says that
they do not need to be insulated, Which Tech is correct?
A. Tech A
B. Tech B
C. Both techs
D. Neither Tech - correct answer -A Tech A
8. The minimum spacing for attaching current carrying conductors to a fuel
line is:
A. 6"
B. 12"
C. 18"
D. None of the above - correct answer -D. None of the above
9. What is the minimum conductor size needed in a 25 amp AC circuit if
four current carrying conductors are bundled together running inside an
engine space using 105 deg wiring insulation?
A. 4 AWG
B. 6 AWG
C. 8 AWG
D. 10 AWG - correct answer -D. 10 AWG
10. How much current should flow through the DC grounding
conductor in a 25 amp DC motor circuit?
A. 0 amps
B. 5 amps
C. 10 amps
D. 25 amps - correct answer -A. 0 amps
WITH ANSWERS.
1. Tech A says that generator AC conductors must be tightly secured to
avoid vibration and movement from the generator set. Tech B says that
the generators AC wiring must be protected from chafing and strain.
Who is right?
A. Tech A
B. Tech B
C. Both Techs
D. Neither Tech - correct answer -C. Both
2. The AC output conductors of an AC generator, tha is not self liming,
shall be provided with over current protection within:
A. 7"
B. 40" if properly sheathed
C. 72"
D. A and B - correct answer -D. A and B
3. Technician A says that when the sensor wire from the oil pressure
gauge is grounded the gauge needle moves to the right, showing full
pressure. THe most likely problem is:
A. Low oil pressure
B. A shorted wire
C. A bad sensing unit
D. A bad gauge - correct answer -C. A bad sensing unit
,4. To test the voltage drop to the cranking motor, connect the volt meter
leads:
A. In series with the battery
B. To the neg battery post and the negative cable termination at the
engine while cranking the engine
C. To the positive battery post and the positive cable
termination at the engine while cranking the engine
D. Both B and C - correct answer -D. Both B and C
5. According to ABYC, the minimum conductor size of the primary conductor
in a lightning protection system is:
A. 8 AWG
B. 6 AWG
C. 4 AWG
D. 0000 AWG - correct answer -C. 4 AWG
6. A customer complains that certain electronic components (fed from a
panel board) malfunction during engine cranking. Probable causes are all
of the following except:
A. Undersized conductor feeding the panelboard
B. Faulty battery switch
C. Undersized cranking battery
D. Undersized DC grounding conductor - correct answer -B. Faulty
battery switch
7. Tech A says that DC negative bus bars that are mounted to a metal
, panelboard must be insulated form the metal enclosure. Tech B says that
they do not need to be insulated, Which Tech is correct?
A. Tech A
B. Tech B
C. Both techs
D. Neither Tech - correct answer -A Tech A
8. The minimum spacing for attaching current carrying conductors to a fuel
line is:
A. 6"
B. 12"
C. 18"
D. None of the above - correct answer -D. None of the above
9. What is the minimum conductor size needed in a 25 amp AC circuit if
four current carrying conductors are bundled together running inside an
engine space using 105 deg wiring insulation?
A. 4 AWG
B. 6 AWG
C. 8 AWG
D. 10 AWG - correct answer -D. 10 AWG
10. How much current should flow through the DC grounding
conductor in a 25 amp DC motor circuit?
A. 0 amps
B. 5 amps
C. 10 amps
D. 25 amps - correct answer -A. 0 amps
