ABYC Electrical 2 Questions with correct Answers

ABYC Electrical 2 Questions with correct Answers D ABYC standard ________ applies to inverters A. E-2 B. A-27 C. A-28 D. A - 31 A A true RMS voltmeter is required to accuralty check output voltage from a(n): A. non-sinusoidal output inverter B. Isolation transformer C. Inverter DC input D. Galvanic isolator C An AC voltmeter is required at the panel if the boat is equipped with: A. A DC windlass B. An AC- powered water heater C. An inverter D. AC- powered reading lamps C All of the following could cause a conductor to overheat except. A. Undersized conductor B. Excessive Amperage C. Insulation temp rating too low D. Corroded connector A Tech A says that AC and DC are able to run together down the same conductor. Tech B says that this is technically impossible which tech is correct? A. Tech A B. Tech B C. Both techs D. Neither tech D To check for charger output to the battery de-enegize charger check batter open - circuit voltage re-energize the charger and check for a voltage ________V DC or more Conductance tester A. Rise of 14 B. Drop of 0.5 C. Drop pf 14 D. Rise of 0.5 C The tool of choice for testing AC generator winding insulation integrity is a: A. TDR B. Fox and hound C. Megohmmeter D. Clamp - type ammeter B On a brushless generator a possible cause for low AC voltage output under load could be: A. High engin RPM B. Faulty exciter winding diode rectifier C. Faulty output circuit breaker D. Excessively high DC voltage supply A All of the following could cause an overheated electrical connection except: A. Conductor with an excessively high insulation temperature rating B. Loose terminal connection C. Corroded connection D. Undersized conductor for the load demand B When trouble shooting AC appliances and equipment for safety considerations the tech should do all of the following except A. Use lock out and tag out procedures B. By-pass over current devices when possible C. De-enegrgize the circuit whenever possible D. Not wear jewelry C For Charging the battery, the alternator produces alternating current that must be changed to direct current by the. A. Solenoid B. Starter C. Rectifier D. Voltage regulator C On an inverter that does not provide a true sine wave output, low voltage troubleshoots must be accomplished using a(n) _________________ type DVOM A. Analog B. Average responding C. True RMS D. Oscillating A A tech is installing the cable run from the batteries to the main DC pannelboard on a boat as part of a refit. The boat has a 12-volt system, and the distance from panel to batteries is 15ft. The max current draw from panel is calculated at 90 amps. what gauge cable should you use? A. 0AWG B. 2AWG C. 4AWG D. 6AWG A Based on the material within section 11, high frequency transformers typically run ______ than traditional transformers. A. Cooler B. Hotter C. Faster D. Slower B If an isolator is used in a battery charging system, regulator voltage sensing should be at the ________ to insure batteries are charged appropriately. A. Batter charger output B. Batteries C. Alternator output D. Isolator input A A reverse polarity indicator should be connected between A. Neutral and ground B. AC ground and DC neg C. Hot and ground D. Hot and neutral C According to the ABYC the minimum size of primary conductor in a lightning production system is A. 8 AWG B. 6 AWG C. 4 AWG D. 000 AWG D In a galvanic isolator installation which of the following could cause a loss of galvanic isolation? A. A shorted isolator diode B. Improper current rating of the isolator C. An onboard neutral - to - ground connection D. All of the above are possible B Tech A says that combined AC/DC panel boards. Are grounded via the DC negative bus. Tech B says that the panelboard should be grounded to the AC grounding bus. which tech is correct? A. Tech A B. Tech B C. Both D. Neither D Sheathed, ungrounded conductors connected directly to a battery must have overcorrect protection devices located within _________ of connection to the battery. A. 7in (175mm) B. 36in (slightly less than 1m_ C. 40in (1m) D. 72 in (1.8m) A If a customer complains about receiving shocks from his boat when the boat is plugged into shore power, the first test should be a : A. Polarity check of the shore cord B. Polarity check of the battery system C. Current leakage test D. Converter voltage check C The metallic case of the battery charger should be connected to the: A. isolated Dc neg output B. Engin room bulkhead grounded terminal C. DC grounding system B According to ABYC, the shore power grounded conductor should: A. Be connected to the AC neutral B. not be grounded onboard the boat C. Be connected to the engine common + terminal D. Be tied to the battery isolator B What is the max allowed overcorrect protection rating in the secondary circuit of an isolation transformer? A. 100% B. 125% C. 135% D. 150% E. all of the above A In engine spaces the conductor insulation shall be out resistant and temp rating of ___________. A. 167 Degrees F B. 150 Degrees F C. 145 Degrees F D. 175 Degrees F C According to ABYC, the shore power grounding conductor should. A. Be connected to the AC neutral B. Not be grounded on board the boat C. Be connected to the engine negative terminal or its bus D. Tied to the battery isolator C Ungrounded conductors shall be provided with overcorrent protection within a distance of _____inches A. 6 in B. 3in C. 18in D. 7in D A "dropped neutral" conductor in a 240/120V shore power system will most likely show up as: A. nuisance tripping of the AC breaker B. Nuisance tripping of an appliance branch circuit breaker C. A loud humming noise emitting from an onboard television D. Burned out 120V appliance C Paralleling batteries increases A. Voltage B. Resistance C. Capacity D. Inductance A Tech A syas a generators neutral and ground must be tied together when the generator is supplying AC power. Tech B says they must always be kept isolated. Which tech is correct? A. Tech A B. Tech B C. Both Techs D. Neither Tech C What material is recommended for clamping conductors over engines and moving machinery according to ABYC A. PVC B. Nylon C. Metal D. Any of the above C When multiple conductors are bundled for a distance greater than _______in, the allowable amacity of each conductor must be derated based on a table found within Standard E-11 A. 15 B. 20 C. 25 D. 30 C When using an infrared temp sensor, a tech finds that the temp of a conductor rises 60 Degrees F when the circuit is activated. A problem cause for this could be... A. Conductor is toi large for the circuit B. Cable insulation is inappropriate to the circuit C. AMG of the conductor in question is too small D. Circuits over current protection rating is too high C To test a 120V AC element in a water heater, the tech may run a _______ test A. voltage B. capacitance C. continuity D. inductance C Tech A says that voltage supplied to the rotor controls alternator output voltage. Tech B says that the alternator output is proportionate to rotor voltage. Which tech is correct? A. Tech A B. Tech B C. Both techs D. Neither C Based on ABYC Standards, Cable attachment to batteries with wing-type nuts is allowed as long as the wire gauge does not exceed: A. 4 AWG B. 6 AWG C. 8 AWG D. 12 AWG B If a customer complains of low voltage at the AC panel, the Tech should first. A. Recalibrate the panel meter B. Check voltage at the dock pedestal C. Check the polarity indicator D. Replace the overcorrect protection device A Some battery manufacturers will only consider replacement on batteries whose condition has been determined by use of a: A. Conductance tester B. Load Tester C. Hydrometer D. Megohmmeter D When installing an inverter in a split bus application, it is important to provide A. An isolated hot bus B. Large inductive loads C. An isolated neutral bus D. Both A and C B The best fuse type to use for the DC feed to an inverter is A. AGC B. Class T C. ANL D. MDL