Download ABYC Advanced Pretest Exam: Questions and Answers for Marine Technicians and more Exams Structures and Materials in PDF only on Docsity!
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A metallic shore power inlet becomes hot to the touch. Which would not be a contributing factor? - Correct Answers ✅Temperature rating of shore-cord insulation An inter-circuit short can cause: - Correct Answers ✅" 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 Answers ✅Power conditioning and conversion LED navigation lights are required to meet: - Correct Answers ✅72 Colregs Which of the following are recommended for 3-phase shore power? - Correct Answers ✅Power conditioning and phase- rotation monitoring Which of the following is an example of a power-quality issue?
- Correct Answers ✅Nuisance tripping of magnetic circuit breakers What tool can be used instead of a power-quality analyzer to measure phase amplitude? - Correct Answers ✅DVOM
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All of the following are functions of a generator voltage regulator EXCEPT: - Correct Answers ✅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 Answers ✅Blocking diode Which power sources can be seamlessly transferred? - Correct Answers ✅" All of the above; AC generators; Shore power; Inverters" Which of the following needs to be considered when retrofitting an electric-propulsion engine? - Correct Answers ✅Proper ventilation of batteries In a NMEA 2000 digital switching system it is necessary to use - Correct Answers ✅Terminating resistors A boat's hull potential is measured: - Correct Answers ✅Between a reference cell and main engine negative
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The maximum battery cable gauge that can be connected to a terminal via wingnut is: - Correct Answers ✅ 8 VFDs control the speed of electric motors (pumps, fans, hoists) by regulating ____? - Correct Answers ✅frequency Do VFDs typically display fault codes, and how can you determine the nature of a fault? - Correct Answers ✅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 Answers ✅ABYCA- True or False: four-wire sensors are the most common configuration in today's engine-control systems. - Correct Answers ✅FALSE; two- and three-wire configurations are more common. According to ABYC A-32, "synchronization" means matching all EXCEPT - Correct Answers ✅amperage Compared to traditional US power sources, _____ delivers three times the power with only 1.5 times the conductor material. - Correct Answers ✅three-phase power
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In a delta configuration, the phase voltage is _____ the line voltage - Correct Answers ✅equal to Three-phase power ______ than single-phase power - Correct Answers ✅is more efficient Proper overcurrent protection for a three-phase motor requires - Correct Answers ✅a triple-pole breaker Three-phase induction motors can be damaged by ____ in a three-phase power distribution system. - Correct Answers ✅loss of voltage The most common cause of AC ripple from an alternator is: - Correct Answers ✅Faulty/low-quality rectifier diode(s) Based on the Fourier method, total harmonic distortion is calculated using: - Correct Answers ✅First and third harmonics only The distortion caused by multiple frequencies in output is called: - Correct Answers ✅Harmonic distortion
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Cabling from the solar-panel positive terminal to the controller should induce a voltage drop of: - Correct Answers ✅not more than 3.0% Diode test function on a multi-meter (DMM) is important to ensure that: - Correct Answers ✅Series circuits don't have excessive resistance. A8YC Standard A-32 addresses power-conversion systems installed between all EXCEPT: - Correct Answers ✅the public utility and the dockside shore-power outlet. Synchronization may refer to compatibility of: - Correct Answers ✅any of the above; voltage;frequency ;waveform E-11.8.1 Load Calculations - __ - Correct Answers ✅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."
- Correct Answers ✅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
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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.) - Correct Answers ✅panelboard, other charging means Per ABYC Standards, before a seamless tranfer, power sources shall be: - Correct Answers ✅synchronized. When converting from a gasoline engine power source to an all-electric, which of the following does NOT need to be considered? - Correct Answers ✅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? - Correct Answers ✅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? - Correct Answers ✅24, The best choice for mounting a digital switching power distribution module is: - Correct Answers ✅Follow manufacturer's recommendations.
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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. - Correct Answers ✅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; - Correct Answers ✅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? - Correct Answers ✅ 60 Ohm What is the optimum tool to diagnose NMEA 2000 CAN bus faults? - Correct Answers ✅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? - Correct Answers ✅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
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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. - Correct Answers ✅ 10 A-32 POWER CONVERSION EQUIPMENT AND SYSTEMS - Correct Answers ✅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
- Correct Answers ✅ 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 - Correct Answers ✅board distribution systems, 300
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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, - Correct Answers ✅regular part of its business A-32.4.5 Independent Laboratory- a facility that: A-32.4.5. 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 - Correct Answers ✅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 - Correct Answers ✅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 - Correct Answers ✅vendor
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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. - Correct Answers ✅supplier A-32.4.6 __________- automatic and proportional sharing of the real (kW) and reactive (kVAR) power of paralleled AC power sources. - Correct Answers ✅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. - Correct Answers ✅Main AC grounding bus A-32.4.8 __________ - a connection of multiple synchronized AC power sources. - Correct Answers ✅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. - Correct Answers ✅Seamless Transfer A-32.4.10 __________ - achieving compatibility of voltage, frequency, waveform and phase angle of independent power sources. - Correct Answers ✅Synchronization
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A-32.5.3_______ sets shall meet the requirements of ABYC A- 27, Alternating Current (AC) Generator Sets. - Correct Answers ✅Generator A-32.5.4______ and combined inverter/chargers shall meet the requirements of ABYC A-31, Battery Chargers and Inverters. - Correct Answers ✅Inverters A-32.5.5 ________, if installed, shall meet the requirements of ABYC A-28, Galvanic Isolators. - Correct Answers ✅Galvanic isolators A-32.6 _____________ - Correct Answers ✅AC SHORE POWER CONVERTERS A-32.6.1 AC shore power converters shall meet the requirements of ___________ Equipment - Semiconductor converters. - Correct Answers ✅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. - Correct Answers ✅isolation transformers
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A-32.7 _____________________ - Correct Answers ✅AC SHORE POWER VOLTAGE REGULATORS A32.7.1 Automatic voltage regulators shall maintain ±% of rated voltage. - Correct Answers ✅ 10 A32.7.2 Manual voltage regulators shall indicate an under/over voltage condition outside ±% of rated voltage. - Correct Answers ✅ 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. - Correct Answers ✅voltage regulator A-32.8 ___________ - Correct Answers ✅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. - Correct Answers ✅switching devices
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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. - Correct Answers ✅synchronization A-32.10.1 Devices capable of combining multiple independent shore power sources shall: A-32.10.1. Prevent_______ of any source that is not intended to be energized or is disconnected. - Correct Answers ✅backfeeding A-32.11 ____________ - Correct Answers ✅SEAMLESS TRANSFER A-32.11.1 AC power sources shall be ______ before seamless transfer. - Correct Answers ✅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) - Correct Answers ✅AC shore power converters and/or inverters
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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).) - Correct Answers ✅manufacturer's A-32.12 _______________ - Correct Answers ✅PARALLEL OPERATION OF POWER SOURCES A-32.12.1 AC power sources shall be_________ before paralleling. - Correct Answers ✅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. - Correct Answers ✅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
