ABYC Advanced Pretest Correct 100%(RATED A+)

A metallic shore power inlet becomes hot to the touch. Which would not be a contributing factor? - ANSWER Temperature rating of shore-cord insulation An inter-circuit short can cause: - 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? - ANSWER Power conditioning and conversion LED navigation lights are required to meet: - ANSWER 72 Colregs Which of the following are recommended for 3-phase shore power? - ANSWER Power conditioning and phase-rotation monitoring Which of the following is an example of a power-quality issue? - ANSWER Nuisance tripping of magnetic circuit breakers What tool can be used instead of a power-quality analyzer to measure phase amplitude? - ANSWER DVOM All of the following are functions of a generator voltage regulator EXCEPT: - 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. - ANSWER Blocking diode Which power sources can be seamlessly transferred? - ANSWER " All of the above; AC generators; Shore power; Inverters" Which of the following needs to be considered when retrofitting an electric-propulsion engine? - ANSWER Proper ventilation of batteries In a NMEA 2000 digital switching system it is necessary to use - ANSWER Terminating resistors A boat's hull potential is measured: - ANSWER Between a reference cell and main engine negative Which statement is correct pertaining to a NMEA 2000 system? - 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: - ANSWER Battery fully charged Which tool could not-be used to diagnose excessive voltage drop? - ANSWER Ammeter An advantage of an insulated DC ground system is: - 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? - ANSWER Water Heater Which of the following could cause a shore-power ELCI main breaker to trip? - 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: - ANSWER 8 VFDs control the speed of electric motors (pumps, fans, hoists) by regulating ____? - ANSWER frequency Do VFDs typically display fault codes, and how can you determine the nature of a fault? - 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 - ANSWER ABYCA-32 True or False: four-wire sensors are the most common configuration in today's engine-control systems. - ANSWER FALSE; two- and three-wire configurations are more common. According to ABYC A-32, "synchronization" means matching all EXCEPT - ANSWER amperage Compared to traditional US power sources, _____ delivers three times the power with only 1.5 times the conductor material. - ANSWER three-phase power In a delta configuration, the phase voltage is _____ the line voltage - ANSWER equal to Three-phase power ______ than single-phase power - ANSWER is more efficient Proper overcurrent protection for a three-phase motor requires - ANSWER a triple-pole breaker Three-phase induction motors can be damaged by ____ in a three-phase power distribution system. - ANSWER loss of voltage The most common cause of AC ripple from an alternator is: - ANSWER Faulty/low-quality rectifier diode(s) Based on the Fourier method, total harmonic distortion is calculated using: - ANSWER First and third harmonics only The distortion caused by multiple frequencies in output is called: - ANSWER Harmonic distortion AC voltage transients cause all the following EXCEPT: - ANSWER Capacitance coupling When attempting to diagnose intermittent power quality issues, which feature of the power quality analyzer is used? - ANSWER Data logging Which function is operational when a block load is applied? - ANSWER Volts per Hz Which of the following components would NOT prevent a generator from creating voltage? - ANSWER Shorted droop CT The following are adjustments on voltage regulators EXCEPT - ANSWER Load gain Electricity coming from a solar panel must be ___ before it's delivered to a battery bank: - ANSWER regulated What is the first step in specifying solar capacity on a boat? - ANSWER DC load analysis A semiconductor - ANSWER exhibits properties directly between those of conductors and insulators Cabling from the solar-panel positive terminal to the controller should induce a voltage drop of: - ANSWER not more than 3.0% Diode test function on a multi-meter (DMM) is important to ensure that: - ANSWER Series circuits don't have excessive resistance. A8YC Standard A-32 addresses power-conversion systems installed between all EXCEPT: - ANSWER the public utility and the dockside shore-power outlet. Synchronization may refer to compatibility of: - ANSWER any of the above; voltage;frequency ;waveform E-11.8.1 Load Calculations - __ - ANSWER DC "Statement A: Switching between AC power sources can be done with seamless transfer. Statement B: Switching between AC power sources can apply the break-before-make method." - ANSWER Statements A and B are both True E-11.8.1.1 The following method shall be used for calculating the total electrical load requirements for determining the minimum size of each ___________, switchboard, and their main conductors. Additionally, this information may be used to size the alternator, or __________, and the battery. (See E-11.6.1.1 and ABYC E-10, Storage Batteries.) - ANSWER panelboard, other charging means Per ABYC Standards, before a seamless tranfer, power sources shall be: - ANSWER synchronized. When converting from a gasoline engine power source to an all-electric, which of the following does NOT need to be considered? - ANSWER Horsepower of the old gasoline engine Per ABYC E-30 standards, what is the maximum impedance for ground-fault monitoring on an AC system with regard to electric propulsion? - ANSWER 1,000 ohms per volt Based on ABYC E-30, if a 144 VDC electric propulsion system has a battery capacity of 240 amp-hours, what is the required AIC rating of the overcurrent protection? - ANSWER 24,000 The best choice for mounting a digital switching power distribution module is: - ANSWER Follow manufacturer's recommendations. The maximum allowable voltage drop for a DSS power distribution module is: - ANSWER 3% Digital switching for AC appliances is appropriate as long as ____? - ANSWER It is not used. When programming electronic circuit protection in a DSS system, it is important to use which reset feature? - ANSWER Manual reset Which of the following best describes the function of a galvanic isolator? - ANSWER Blocks DC current A boat's hull potential is measured: - ANSWER Between a reference cell and the engine negative terminal or its bus. During a corrosion survey, the hull potential has slowly shifted by 30 mV over the course of I hour. This indicates - ANSWER Extreme under protection You have detected a harmful 250mA DC galvanic current flow from the boat's ground to the dock ground through the shore-power grounding conductor. Statement A: A properly installed and functional galvanic isolator should correct this. Statement B: A properly installed and functional shore-power polarization transformer should correct this. - ANSWER Statement A is TRUE; Statement B is FALSE. E-11.8.1.1.1 In column A of TABLE II, Electrical Load Requirement Worksheet, list the current rating (amps) of the loads that must be available for use on a________ duty basis for normal operations; - ANSWER continuous In a J 1939 CAN Bus, what is the expected resistance in a CAN Transceiver Resistance test between CAN high and ground as well as the CAN low and ground? - ANSWER 60 Ohm What is the optimum tool to diagnose NMEA 2000 CAN bus faults? - ANSWER A NMEA 2000 diagnostic tool Which type of electrical interference can potentially cause system-wide problems since power cords are connected directly to the entire power distribution network? - ANSWER Conducted emissions E-11.8.1.1.2 In column B of TABLE II, list the current rating (amps) of the remaining loads that are intermittent, and total these loads. Take __% of the total load in column B, or the current draw of the largest item, whichever is greater, and add this value to the total from column A to establish the total electrical load. NOTE: Calculations are based on the actual operating amperage for each load, and not on the rating of the circuit breaker or fuse protecting that branch circuit. - ANSWER 10 A-32__ POWER CONVERSION EQUIPMENT AND SYSTEMS - ANSWER AC A-32.2 SCOPE This document applies to electrical and electronic power conversion and control equipment in the AC shore power feed: A-32.2.1 Operating at___ volts or less, and - ANSWER 600 A-32.2 SCOPE This document applies to electrical and electronic power conversion and control equipment in the AC shore power feed: A-32.2.2 to on __________operating at ___ VAC or less; single or three-phase, installed between the shore power inlet and the distribution panel, between shore power and on-board AC power sources, and between multiple on-board AC power sources for the purposes of: Power conditioning and conversion ◊ Seamless transfer between sources ◊ Parallel operation of sources - ANSWER board distribution systems, 300 A-32.4.1 ________________- an electrical, electronic or electromechanical device which typically provides the following capabilities - electrical isolation, frequency conversion and voltage conversion - between the shore outlet and the boats electrical system. Additional capabilities may be included as required by specific installations (e.g. phase conversion, power conditioning, synchronization). - ANSWER AC Shore Power Converter A-32.4.2 ___________ - an electrical, electronic or electromechanical device which typically provides manual or automatic voltage regulation. Additional capabilities may be included as required by specific installations. (e.g. electrical isolation, noise suppression) - ANSWER AC Shore Power Voltage Regulator A-32.4.3 ______ - condition in which voltage or energy available from an AC power source is inadvertently supplied to devices or connections not intended to be energized by the source supplying the power ( e.g. onboard generator set supplying power to the shore power inlet) under normal and single fault conditions. - ANSWER Backfeed A-32.4.4 ___________ - an electrical or electronic control means of preventing unintended simultaneous operation of power switching devices. - ANSWER Electrical Interlocking A-32.4.5 Independent Laboratory- a facility that: A-32.4.5.1 is engaged, as a _________, in performing periodic inspections and tests that are the same as, or similar to, the inspections and qualification tests required for the equipment or material being evaluated, - ANSWER regular part of its business A-32.4.5 Independent Laboratory- a facility that: A-32.4.5.2 has, or has_______ to, the apparatus, facilities, personnel, and calibrated instruments that are necessary to inspect and test the equipment or material being evaluated, and - ANSWER access A-32.4.5 Independent Laboratory- a facility that:A-32.4.5.3 is not owned or controlled by: A-2.4.5.3.1 the_________ of the equipment or material to be inspected or tested or any similar equipment or material; or - ANSWER manufacturer A-32.4.5 Independent Laboratory- a facility that:A-32.4.5.3 is not owned or controlled by: A-32.4.5.3.2 a____ of the equipment or material to be inspected or tested or a vendor of similar equipment or materials; or - ANSWER vendor A-32.4.5 Independent Laboratory- a facility that:A-32.4.5.3 is not owned or controlled by: A-32.4.5.3.3 a______ of materials to the manufacturer. - ANSWER supplier A-32.4.6 __________- automatic and proportional sharing of the real (kW) and reactive (kVAR) power of paralleled AC power sources. - ANSWER Load Sharing A-32.4.7 __________ - a point of connection for all power source output ground and neutral conductors. This may be a single combined bus for both the source neutral and ground conductors or separate neutral and ground busses joined by a common conductor. - ANSWER Main AC grounding bus A-32.4.8 __________ - a connection of multiple synchronized AC power sources. - ANSWER Parallel Operation A-32.4.9 __________ - a momentary connection of separate synchronized AC power sources to avoid interruption before the transfer of power from one source to another. - ANSWER Seamless Transfer A-32.4.10 __________ - achieving compatibility of voltage, frequency, waveform and phase angle of independent power sources. - ANSWER Synchronization A-32.4.11 ___________ - a transformer meeting the requirements of ABYC E-11 ,AC & DC Electrical Systems on Boats installed in the shore power supply circuit on a boat to electrically isolate all the normally current carrying AC system conductors, including the AC grounding conductor (green) on the boat, from the AC system conductors of the shore power supply. - ANSWER Transformer, isolation A32.4.12 __________ - a transformer, installed in the shore power supply circuit on the boat to electrically isolate the normally current carrying AC system conductors, but not the AC grounding conductor (green), from the normally current carrying conductors of the shore power supply. - ANSWER Transformer, polarization A-32.5.1 Each ________ (e.g. generator sets, shore power, inverters) shall be installed in accordance with ABYC E-11, AC & DC Electrical Systems on Boats. - ANSWER source of power A-32.5.1 ________ and components shall meet the requirements of ABYC E-11, AC & DC Electrical Systems on Boats . - ANSWER Shore power systems A-32.5.3_______ sets shall meet the requirements of ABYC A-27, Alternating Current (AC) Generator Sets. - ANSWER Generator A-32.5.4______ and combined inverter/chargers shall meet the requirements of ABYC A-31, Battery Chargers and Inverters. - ANSWER Inverters A-32.5.5 ________, if installed, shall meet the requirements of ABYC A-28, Galvanic Isolators. - ANSWER Galvanic isolators A-32.6 _____________ - ANSWER AC SHORE POWER CONVERTERS A-32.6.1 AC shore power converters shall meet the requirements of ___________ Equipment - Semiconductor converters. - ANSWER IEC A-32.6.2 AC shore power converters incorporating ____________ shall meet the requirements of an isolation transformer in ABYC E-11, AC & DC Electrical Systems on Boats, if used for the purposes of galvanic isolation. - ANSWER isolation transformers A-32.7 _____________________ - ANSWER AC SHORE POWER VOLTAGE REGULATORS A32.7.1 Automatic voltage regulators shall maintain ±__% of rated voltage. - ANSWER 10 A32.7.2 Manual voltage regulators shall indicate an under/over voltage condition outside ±__% of rated voltage. - ANSWER 10 A32.7.3 If the _____uses a transformer for the purposes of galvanic isolation, it shall meet the requirements of an isolation transformer in ABYC E-11, AC & DC Electrical Systems on Boats. - ANSWER voltage regulator A-32.8 ___________ - ANSWER ELECTRICAL INTERLOCKING 32.8.1 Electrical interlocking shall be provided for ________in installations that are not capable of seamless transfer or parallel operations and to prevent a single bus from being energized by more than one non-synchronized AC power source simultaneously. - ANSWER switching devices A-32.9 __________ - ANSWER BACKFEED PROTECTION A-32.9.1 Provisions shall be made to prevent __________ of any source that is not intended to be energized or is inaAn inter-circuit short can cause: - ANSWER " All of the above; Unrelated circuits to operate simultaneously; Components to work at reduced capacity; An over-current situation"