[ ABYC MARINE ELECTRICAL CERTIFICATION ]
EXAMINATION COMPLETE QUESTIONS AND DETAILED
SOLUTIONS
LATEST UPDATE THIS YEAR JUST RELEASED
Question 1: An electrical diode is a component that:
A. Is found in alternators
B. Is found in galvanic isolators
C. Is found in battery isolators
D. All of the above are correct
Answer:
d. All of the above are correct
Question 2: Voltage drop could be used to test for a bad starter
cable. To test the cable a technician would use the DVOM and
check voltage at what two points?
A. At both ends of the cable
B. The battery terminals
C. The positive cable at starter and engine block (ground)
D. At the starter solenoid and engine block (ground)
Answer:
a. At both ends of the cable
Question 3: An ampere is a measurement of:
A. Power
B. Resistance
, C. Potential to do work
D. Current Flow
Answer:
d. Current Flow
Question 4: T or F: On an AC and DC combined panel that it affixed
with screws, the energized AC parts on the back of the panel must
be covered.
Answer:
True.
Question 5: What is the best way to prevent corrosion on a battery
cable
A. Use WD 40
B. Use corrosion block
C. Heat shrink the entire battery post
D. Use pure copper lugs
Answer:
b. Use corrosion block
Question 6: T or F: A shunt is a conductor of known resistance
placed in series with a circuit to indicate current flow by
measurement of the voltage drop across this conductor.
Answer:
True
,Question 7: A light circuit uses a 12 volt battery to power a bulb
which uses 2.5 amps of power. How many watts Is the light bulb?
A. 10 W
B. 20 W
C. 30 W
D. 40 W
Answer:
c. 30 W
Question 8: A branch circuit for DC power can have overcurrent
protection not to exceed _____ of conductor ampacity.
A. 125%
B. 135%
C. 150%
D. Not required
Answer:
c. 150% (see 11.10.1.5.2)
Question 9: When combining batteries in DC installation, which
statement is NOT true.
A. two 12 volt batteries connected in series will give 24 volts.
B. two 12 volt batteries connected in parallel will give 12 volts
C. When connected in series, AmpHrs is increased.
D. When connected in series, AmpHrs stays the same.
Answer:
c. When connected in series AmpHrs is increased.
, Question 10: On a vessel with 1 charging source ABYC requires
sustaining DC loads for _____ minutes:
A. 30
B. 60
C. 90
D. 120
Answer:
c. 90 minutes
Question 11: A customer has a 600 Ah 'house' battery bank and
wants to recharge with the highest amperage (standard flooded
batteries are being used). How high amperage is reasonable?
A. 200 amps
B. 150 amps
C. 100 amps
D. 50 amps
Answer:
b. 150 amps (25% of capacity)
Question 12: While out cruising (away from the dock), batteries on
a typical cruiser have what percentage of charge?
A. 0 - 100%
B. 25 - 75%
C. 50 - 100%
D. 50 - 85%
Answer:
d. 50 - 85%
EXAMINATION COMPLETE QUESTIONS AND DETAILED
SOLUTIONS
LATEST UPDATE THIS YEAR JUST RELEASED
Question 1: An electrical diode is a component that:
A. Is found in alternators
B. Is found in galvanic isolators
C. Is found in battery isolators
D. All of the above are correct
Answer:
d. All of the above are correct
Question 2: Voltage drop could be used to test for a bad starter
cable. To test the cable a technician would use the DVOM and
check voltage at what two points?
A. At both ends of the cable
B. The battery terminals
C. The positive cable at starter and engine block (ground)
D. At the starter solenoid and engine block (ground)
Answer:
a. At both ends of the cable
Question 3: An ampere is a measurement of:
A. Power
B. Resistance
, C. Potential to do work
D. Current Flow
Answer:
d. Current Flow
Question 4: T or F: On an AC and DC combined panel that it affixed
with screws, the energized AC parts on the back of the panel must
be covered.
Answer:
True.
Question 5: What is the best way to prevent corrosion on a battery
cable
A. Use WD 40
B. Use corrosion block
C. Heat shrink the entire battery post
D. Use pure copper lugs
Answer:
b. Use corrosion block
Question 6: T or F: A shunt is a conductor of known resistance
placed in series with a circuit to indicate current flow by
measurement of the voltage drop across this conductor.
Answer:
True
,Question 7: A light circuit uses a 12 volt battery to power a bulb
which uses 2.5 amps of power. How many watts Is the light bulb?
A. 10 W
B. 20 W
C. 30 W
D. 40 W
Answer:
c. 30 W
Question 8: A branch circuit for DC power can have overcurrent
protection not to exceed _____ of conductor ampacity.
A. 125%
B. 135%
C. 150%
D. Not required
Answer:
c. 150% (see 11.10.1.5.2)
Question 9: When combining batteries in DC installation, which
statement is NOT true.
A. two 12 volt batteries connected in series will give 24 volts.
B. two 12 volt batteries connected in parallel will give 12 volts
C. When connected in series, AmpHrs is increased.
D. When connected in series, AmpHrs stays the same.
Answer:
c. When connected in series AmpHrs is increased.
, Question 10: On a vessel with 1 charging source ABYC requires
sustaining DC loads for _____ minutes:
A. 30
B. 60
C. 90
D. 120
Answer:
c. 90 minutes
Question 11: A customer has a 600 Ah 'house' battery bank and
wants to recharge with the highest amperage (standard flooded
batteries are being used). How high amperage is reasonable?
A. 200 amps
B. 150 amps
C. 100 amps
D. 50 amps
Answer:
b. 150 amps (25% of capacity)
Question 12: While out cruising (away from the dock), batteries on
a typical cruiser have what percentage of charge?
A. 0 - 100%
B. 25 - 75%
C. 50 - 100%
D. 50 - 85%
Answer:
d. 50 - 85%
