Download ABYC Advanced Pretest Questions and Answers: Boat Electrical Systems and more Exams Biology in PDF only on Docsity!
American Boat and Yacht
Council ABYC Advanced
Pretest questions and
answers
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
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
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-32.4.7 __________ - 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 60092- 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
A-32.10.1 Devices capable of combining multiple independent shore power sources shall: A-32.10.1.1 Establish and maintain_______ while combining the sources. - answer synchronization A-32.10.1 Devices capable of combining multiple independent shore power sources shall: A-32.10.1.2 Prevent_______ of any source that is not intended to be energized or is disconnected. - answer backfeeding A-32.11 ____________ - answer SEAMLESS TRANSFER A-32.11.1 AC power sources shall be ______ before seamless transfer. - answer synchronized A-32.11.2 During seamless transfers between shore power and an onboard source, sources shall be paralleled for no more than I second to facilitate load transfer. EXCEPTION: Installations employing ___________ with provisions for seamless transfer and backfeed protection (See A-32.8 for backfeed protection requirements) - answer AC shore power converters and/or inverters A-32.11.3 During seamless transfers between onboard AC sources, reverse power protection shall be provided in accordance with the equipment___________ instructions. (See DIAGRAM 4 (FIGURE 7-4) and DIAGRAMS (FIGURE 7-5).) - answer manufacturer's A-32.12 _______________ - answer PARALLEL OPERATION OF POWER SOURCES A-32.12.1 AC power sources shall be_________ before paralleling. - answer synchronized A-32.12.2 A configuration that allows shore power sources to be operated in_______ with on board power sources shall have isolation transformer(s), polarization transformer(s), or shore power converters with isolation or polarization transformers. (See DIAGRAM I (FIGURE 7-1), DIAGRAM 2 (FIGURE 7-2), DIAGRAM 3 (FIGURE 7-3)) NOTE: The secondary of onboard isolation or polarization transformers
or shore power converters with isolation transformers is considered an onboard power source. EXCEPTION: Systems using an inverter capable of parallel operation with shore power. - answer parallel A-32.12.2 A configuration that allows shore power sources to be operated in parallel with on board power sources shall have isolation transformer(s), polarization transformer(s), or shore power converters with isolation or polarization transformers. (See DIAGRAM I (FIGURE 7-1), DIAGRAM 2 (FIGURE 7-2), DIAGRAM 3 (FIGURE 7-3)) NOTE: The secondary of onboard isolation or polarization transformers or shore power converters with isolation transformers is considered an onboard power source. EXCEPTION: Systems using an inverter capable of_____ operation with shore power. - answer parallel A-32.12.3 The grounding conductors of onboard power sources that may be operated in parallel shall be ________ per ABYC E-11, AC and DC Electrical Systems on Boats. - answer grounded A-32.12.4 Onboard power sources intended to be operated in parallel shall be provided with the following: A-32.12.4.1 Under/Over voltage________ and - answer protection A-32.12.4 Onboard power sources intended to be operated in parallel shall be provided with the following: A-32.12.4.2 Under/Over________ protection. - answer frequency A-32.12.5 _________ - answer Generators A-32.12.5.1 Provisions shall be made to load share paralleled_______ during steady state operation. - answer generators A-32.12.5.2 Reverse power protection shall be provided in accordance with the equipment_________ instructions. - answer manufacturer's
E-30.1 PURPOSE This standard is a guide for the design, construction, and installation of alternating current (AC) and direct current (DC) electrical systems on boats for the purpose of propulsion. NOTES: 1. _____________ has promulgated mandatory requirements for electrical systems in Title 33, CFR 183 Subpart I. Refer to the CFR for current federal requirements. - answer The United States Coast Guard E-30.1 PURPOSE This standard is a guide for the design, construction, and installation of alternating current (AC) and direct current (DC) electrical systems on boats for the purpose of propulsion. NOTES: 2. ABYC E-11, AC and DC Electrical Systems on Boats outlines information for voltages less than ___VAC and __VDC. - answer 300, 60 E-30.1 PURPOSE This standard is a guide for the design, construction, and installation of alternating current (AC) and direct current (DC) electrical systems on boats for the purpose of propulsion. NOTES: 3. Three phase power systems pose different and significant risks from those encountered with single phase systems and should only be installed and maintained by properly trained technicians under appropriate engineering supervision, and in accordance with specifications detailed in any of the various recognized standards including____, ABS, Det Norske Veritas, etc. - answer IEEE E-30.1 PURPOSE This standard is a guide for the design, construction, and installation of alternating current (AC) and direct current (DC) electrical systems on boats for the purpose of propulsion. NOTES: 3. Three phase power systems pose different and significant risks from those encountered with single phase systems and should only be installed and maintained by properly trained technicians under appropriate engineering supervision, and in accordance with specifications detailed in any of the various recognized standards including IEEE,____, Det Norske Veritas, etc. - answer ABS E-30.1 PURPOSE This standard is a guide for the design, construction, and installation of alternating current (AC) and direct current (DC) electrical systems on boats for the purpose of propulsion. NOTES: 3. Three phase power systems pose different and significant risks from those encountered with single phase systems and should only be installed and maintained by properly trained technicians under appropriate engineering supervision, and in accordance with specifications detailed in any of the
various recognized standards including IEEE, ABS, ___________, etc. - answer Det Norske Veritas E-30.2.1 alternating current (AC) systems on boats operating at more than ___VAC, but less than 1000VAC and - answer 300 E-30.2.1 alternating current (AC) systems on boats operating at more than 300VAC, but less than _____VAC and - answer 1000 E-30.2.2 direct current (DC) systems on boats operating at more than __VDC nominal but less than 1000VDC, including battery banks, motors, and controllers for the purpose of propulsion. NOTES: The electric propulsion system can include several components including but not limited to: 1. Generators, 2. Inverters, 3. Battery chargers, 4. Batteries, 5. Electric propulsion motors, 6. Transformers, 7. AC/DC, DC/DC, DC/AC, AC/AC converters, 8. Motor control devices - answer 60 E-30.2.2 direct current (DC) systems on boats operating at more than 60VDC nominal but less than _____VDC, including battery banks, motors, and controllers for the purpose of propulsion. NOTES: The electric propulsion system can include several components including but not limited to: 1. Generators, 2. Inverters, 3. Battery chargers, 4. Batteries, 5. Electric propulsion motors, 6. Transformers, 7. AC/DC, DC/DC, DC/AC, AC/AC converters, 8. Motor control devices - answer 1000 E-30.4.1 AC_____ Conductor - a current-carrying conductor that is intentionally maintained at ___________. NOTE: This may be referred to as the neutral (white) conductor in AC electrical systems. - answer Grounded E-30.4.2 AC ______ Conductor (green or green with a yellow stripe) - a conductor, not normally carrying current, used to connect the metallic non-current carrying parts of AC electrical equipment to the AC grounding bus, engine negative terminal or its bus, and to the source ground. - answer Grounding
E-30.4.11 __________ - an assembly of devices, such as circuit breakers, fuses, switches, instruments, and indicators, for the purpose of controlling and/or distributing electrical power. - answer Panelboard (switchboard) E-30.4.12 _____________ - voltage levels that can harm humans through electric shock (see UL 2231, Personnel Protection Systems for Electric Vehicle (EV) Supply Circuits: General Requirements and UL 2202, Electric Vehicle (EV) Charging System Equipment). DC voltages over 60 V and all AC voltages are considered potentially hazardous. - answer Potentially Hazardous Voltage E-30.4.13 __________- a device whose maximum output is restricted to a specified value by its magnetic or electrical characteristics. - answer Self-limiting E-30.4.14 __________ - All exterior areas exposed to weather and not fully enclosed by permanent boat structures. - answer Wet Area E-30.5.1 The electrical wiring, connections, and installation shall be in accordance with the requirements of ________, AC and DC Electrical Systems on Boats except when otherwise noted. - answer ABYC E- E-30.5.2 Optional equipment at or below 60 VDC or 300 VAC, dependent and connected to this system such as low voltage AC and/or DC appliances (e.g. ,galley stoves, HVAC, water heaters,), shall be powered by isolated sources, such as __________ DC to DC converters, galvanically isolated DC to AC inverters, or AC safety/isolation transformers. - answer galvanically isolated E-30.5.3 The ________________________ shall be considered when choosing cable size, 30°C (86 °F), 50°C (122°F) and 60°C (140°F) degree ambients are represented in TABLE I. The ambient environment design temperature of machinery spaces shall be considered to be 122°F (50°C). - answer ambient environment design temperature
E-30.5.4 The ________ shall be designed for the environment in which it is intended to be used. Where necessary, consideration shall also be given to ambient raw water- cooling temperature. - answer propulsion system E-30.5.5 The equipment shall be designed and tested for the________ where it is intended to be used (e.g., shock, vibration, humidity, salt-spray). - answer environment E-30.5.6 Distribution systems shall be fully insulated, ungrounded and: - answer ungrounded E-30.5.6 Distribution systems shall be fully insulated, ungrounded and: E-30.5.6.1 DC systems shall be a _________ system. - answer two-wire E-30.5.6.2 AC systems shall be either, or a combination of: E-30.5.6.2.1 _____________ that are: - answer single phase systems E-30.5.6.2 AC systems shall be either, or a combination of: E-30.5.6.2.1 single phase systems that are: E-30.5.6.2.1.1 ___________, - answer single phase 2 wire E-30.5.6.2 AC systems shall be either, or a combination of: E-30.5.6.2.1 single phase systems that are: E-30.5.6.2.1.2 single phase 3 wire with ______, or - answer neutral E-30.5.6.2.2 three phase systems that are: E-30.5.6.2.2.1 _____, - answer 3 wire E-30.5.6.2.2 three phase systems that are: E-30.5.6.2.2.2 _______ with neutral. - answer 4 wire E-30.5.7 There shall be a means of emergency stop which disables the propulsion system, and which can be reached quickly and safely for effective use without the
