ABYC Advanced Pretest UPDATED
Questions and CORRECT Answers
A metallic shore power inlet becomes hot to the touch. Which would not be a contributing
factor? - CORRECT ANSWER - Temperature rating of shore-cord insulation
An inter-circuit short can cause: - CORRECT ANSWER - " All of the above; Unrelated
circuits to operate simultaneously; Components to work at reduced capacity; An over-current
situation"
Which of the following is addressed by ABYC A-32? - CORRECT ANSWER - Power
conditioning and conversion
LED navigation lights are required to meet: - CORRECT ANSWER - 72 Colregs
Which of the following are recommended for 3-phase shore power? - CORRECT
ANSWER - Power conditioning and phase-rotation monitoring
Which of the following is an example of a power-quality issue? - CORRECT ANSWER -
Nuisance tripping of magnetic circuit breakers
What tool can be used instead of a power-quality analyzer to measure phase amplitude? -
CORRECT ANSWER - DVOM
All of the following are functions of a generator voltage regulator EXCEPT: - CORRECT
ANSWER - Control generator power factor
A true-DC wind generator might be inadvertently powered by the batteries if a ________ is not
part of the installation. - CORRECT ANSWER - Blocking diode
,Which power sources can be seamlessly transferred? - CORRECT ANSWER - " All of the
above; AC generators; Shore power; Inverters"
Which of the following needs to be considered when retrofitting an electric-propulsion engine? -
CORRECT ANSWER - Proper ventilation of batteries
In a NMEA 2000 digital switching system it is necessary to use - CORRECT ANSWER -
Terminating resistors
A boat's hull potential is measured: - CORRECT ANSWER - Between a reference cell and
main engine negative
Which statement is correct pertaining to a NMEA 2000 system? - CORRECT ANSWER -
" Both a and b; Resistors are to be used only at both ends of the system;
NMEA cables provide power and data in a single cable"
Slower than normal engine cranking could be an indication of all the following except: -
CORRECT ANSWER - Battery fully charged
Which tool could not-be used to diagnose excessive voltage drop? - CORRECT
ANSWER - Ammeter
An advantage of an insulated DC ground system is: - CORRECT ANSWER - Easier
detection of ground faults
Which equipment may not need to be changed when a boat built by an international builder using
50 Hz AC is imported to the US? - CORRECT ANSWER - Water Heater
Which of the following could cause a shore-power ELCI main breaker to trip? - CORRECT
ANSWER - Multiple shore-power inlet neutral conductors on the load side of the ELCI are
connected
,The maximum battery cable gauge that can be connected to a terminal via wingnut is: -
CORRECT ANSWER -8
VFDs control the speed of electric motors (pumps, fans, hoists) by regulating ____? -
CORRECT ANSWER - frequency
Do VFDs typically display fault codes, and how can you determine the nature of a fault? -
CORRECT ANSWER - Yes, they do; refer to the manufacturer's list of fault codes.
According to ____ , seamless transfers between sources cannot maintain parallel for more than I
second - CORRECT ANSWER - ABYCA-32
True or False: four-wire sensors are the most common configuration in today's engine-control
systems. - CORRECT ANSWER - FALSE; two- and three-wire configurations are more
common.
According to ABYC A-32, "synchronization" means matching all EXCEPT - CORRECT
ANSWER - amperage
Compared to traditional US power sources, _____ delivers three times the power with only 1.5
times the conductor material. - CORRECT ANSWER - three-phase power
In a delta configuration, the phase voltage is _____ the line voltage - CORRECT
ANSWER - equal to
Three-phase power ______ than single-phase power - CORRECT ANSWER - is more
efficient
Proper overcurrent protection for a three-phase motor requires - CORRECT ANSWER -a
triple-pole breaker
, Three-phase induction motors can be damaged by ____ in a three-phase power distribution
system. - CORRECT ANSWER - loss of voltage
The most common cause of AC ripple from an alternator is: - CORRECT ANSWER -
Faulty/low-quality rectifier diode(s)
Based on the Fourier method, total harmonic distortion is calculated using: - CORRECT
ANSWER - First and third harmonics only
The distortion caused by multiple frequencies in output is called: - CORRECT ANSWER -
Harmonic distortion
AC voltage transients cause all the following EXCEPT: - CORRECT ANSWER -
Capacitance coupling
When attempting to diagnose intermittent power quality issues, which feature of the power
quality analyzer is used? - CORRECT ANSWER - Data logging
Which function is operational when a block load is applied? - CORRECT ANSWER -
Volts per Hz
Which of the following components would NOT prevent a generator from creating voltage? -
CORRECT ANSWER - Shorted droop CT
The following are adjustments on voltage regulators EXCEPT - CORRECT ANSWER -
Load gain
Electricity coming from a solar panel must be ___ before it's delivered to a battery bank: -
CORRECT ANSWER - regulated
Questions and CORRECT Answers
A metallic shore power inlet becomes hot to the touch. Which would not be a contributing
factor? - CORRECT ANSWER - Temperature rating of shore-cord insulation
An inter-circuit short can cause: - CORRECT ANSWER - " All of the above; Unrelated
circuits to operate simultaneously; Components to work at reduced capacity; An over-current
situation"
Which of the following is addressed by ABYC A-32? - CORRECT ANSWER - Power
conditioning and conversion
LED navigation lights are required to meet: - CORRECT ANSWER - 72 Colregs
Which of the following are recommended for 3-phase shore power? - CORRECT
ANSWER - Power conditioning and phase-rotation monitoring
Which of the following is an example of a power-quality issue? - CORRECT ANSWER -
Nuisance tripping of magnetic circuit breakers
What tool can be used instead of a power-quality analyzer to measure phase amplitude? -
CORRECT ANSWER - DVOM
All of the following are functions of a generator voltage regulator EXCEPT: - CORRECT
ANSWER - Control generator power factor
A true-DC wind generator might be inadvertently powered by the batteries if a ________ is not
part of the installation. - CORRECT ANSWER - Blocking diode
,Which power sources can be seamlessly transferred? - CORRECT ANSWER - " All of the
above; AC generators; Shore power; Inverters"
Which of the following needs to be considered when retrofitting an electric-propulsion engine? -
CORRECT ANSWER - Proper ventilation of batteries
In a NMEA 2000 digital switching system it is necessary to use - CORRECT ANSWER -
Terminating resistors
A boat's hull potential is measured: - CORRECT ANSWER - Between a reference cell and
main engine negative
Which statement is correct pertaining to a NMEA 2000 system? - CORRECT ANSWER -
" Both a and b; Resistors are to be used only at both ends of the system;
NMEA cables provide power and data in a single cable"
Slower than normal engine cranking could be an indication of all the following except: -
CORRECT ANSWER - Battery fully charged
Which tool could not-be used to diagnose excessive voltage drop? - CORRECT
ANSWER - Ammeter
An advantage of an insulated DC ground system is: - CORRECT ANSWER - Easier
detection of ground faults
Which equipment may not need to be changed when a boat built by an international builder using
50 Hz AC is imported to the US? - CORRECT ANSWER - Water Heater
Which of the following could cause a shore-power ELCI main breaker to trip? - CORRECT
ANSWER - Multiple shore-power inlet neutral conductors on the load side of the ELCI are
connected
,The maximum battery cable gauge that can be connected to a terminal via wingnut is: -
CORRECT ANSWER -8
VFDs control the speed of electric motors (pumps, fans, hoists) by regulating ____? -
CORRECT ANSWER - frequency
Do VFDs typically display fault codes, and how can you determine the nature of a fault? -
CORRECT ANSWER - Yes, they do; refer to the manufacturer's list of fault codes.
According to ____ , seamless transfers between sources cannot maintain parallel for more than I
second - CORRECT ANSWER - ABYCA-32
True or False: four-wire sensors are the most common configuration in today's engine-control
systems. - CORRECT ANSWER - FALSE; two- and three-wire configurations are more
common.
According to ABYC A-32, "synchronization" means matching all EXCEPT - CORRECT
ANSWER - amperage
Compared to traditional US power sources, _____ delivers three times the power with only 1.5
times the conductor material. - CORRECT ANSWER - three-phase power
In a delta configuration, the phase voltage is _____ the line voltage - CORRECT
ANSWER - equal to
Three-phase power ______ than single-phase power - CORRECT ANSWER - is more
efficient
Proper overcurrent protection for a three-phase motor requires - CORRECT ANSWER -a
triple-pole breaker
, Three-phase induction motors can be damaged by ____ in a three-phase power distribution
system. - CORRECT ANSWER - loss of voltage
The most common cause of AC ripple from an alternator is: - CORRECT ANSWER -
Faulty/low-quality rectifier diode(s)
Based on the Fourier method, total harmonic distortion is calculated using: - CORRECT
ANSWER - First and third harmonics only
The distortion caused by multiple frequencies in output is called: - CORRECT ANSWER -
Harmonic distortion
AC voltage transients cause all the following EXCEPT: - CORRECT ANSWER -
Capacitance coupling
When attempting to diagnose intermittent power quality issues, which feature of the power
quality analyzer is used? - CORRECT ANSWER - Data logging
Which function is operational when a block load is applied? - CORRECT ANSWER -
Volts per Hz
Which of the following components would NOT prevent a generator from creating voltage? -
CORRECT ANSWER - Shorted droop CT
The following are adjustments on voltage regulators EXCEPT - CORRECT ANSWER -
Load gain
Electricity coming from a solar panel must be ___ before it's delivered to a battery bank: -
CORRECT ANSWER - regulated
