ABYC ELECTRICAL STUDY 1 questions with verified answers

ABYC ELECTRICAL STUDY 1 questions with verified
answers
1. A POSSIBLE CAUSE OF CORRECT NO LOAD VOLTAGE WITH A LOSS OF VOLTAGE
AT FULL LOAD ON A BRUSHLESS GENERATOR COULD BE: Ans✓✓✓-SHORTED
DIODE IN EXCITER ROTOR


1. A TECHNICIAN HAS INSTALLED A SPOTLIGHT RATED TO DRAW 14 AMPS AT 12
VDC. THE DISTANCE BETWEEN DC PANEL BOARD AND SPOTLIGHT IS 24'. WHAT
WOULD BE THE PROPER WIRE GAUGE SIZE BASED ON ABYC E-11 STANDARD?
Ans✓✓✓-10 GAUGE (REFER TO VOLTAGE DROP TABLE AT P. 32-33)


1. A TECHNICIAN IS INSTALLING THE CABLE RUN FROM THE BATTERIES TO THE
MAIN DC PANELBOARD ON A BOAT AS PART OF A REFIT. THE BOAT HAS A 12-
VOLT SYSTEM, AND THE DISTANCE FROM THE PANEL TO THE BATTERIES IS 15FT
(APPROXIMATELY 3 M). THE MAXIMUM CURRENT DRAW FROM THE PANEL IS
CALCULATED AT 90 AMPS. WHAT GAUGE CABLE SHOULD BE USED AT A
MINIMUM TO MAINTAIN STANDARDS COMPLIANCE? Ans✓✓✓-0 AWG
(DISTANCE FROM THE PANEL TO THE BATT 15 FT DISTANCE FROM THE BATTERY
TO THE PANEL 15FT, T=30FT)


1. A VOLTAGE REGULATOR CONTROLS? Ans✓✓✓-ALTERNATOR FIELD VOLTAGE


1. ACCORDING TO ABYC WHAT MATERIAL IS RECOMMENDED FOR CLAMPING
CONDUCTORS OVER ENGINES OR ANY TYPE OF MOVING MACHINERY Ans✓✓✓-
METAL


1. ACCORDING TO ABYC, ACCEPTABLE MINIMUM CLEARANCE FOR ROUTING WIRE
NEAR A DRY EXHAUST SECTION IS Ans✓✓✓-9 INCHES

,1. ACCORDING WITH THE RECOMMENDATION FROM STANDARD E-11 THE
WIRING COLOR CODE FOR "DC NEGATIVE CONDUCTOR" IS: Ans✓✓✓-BLACK OR
YELLOW


1. ALL OF THE FOLLOWING ARE AREAS THAT WOULD REQUIRE CHAFE
PROTECTION EXCEPT Ans✓✓✓-BILGE


1. ALL OF THE FOLLOWING ARE COMPONENTS THAT MAY BE FOUND IN SYSTEMS
DESIGNED TO CHARGE MULTIPLE BATTERY BANKS EXCEPT Ans✓✓✓-GALVANIC
ISOLATORS


1. ALL OF THE FOLLOWING COULD CAUSE A CONDUCTOR TO OVERHEAT EXCEPT
Ans✓✓✓-INSULATION TEMPERATURE RATING TOO LOW


1. AN ELECTRIC WATER HEATER THAT USES A 1000 WATT 120 VAC ELEMENT
REQUIRE A MINIMUM OVERCURRENT PROTECTION RATING OF Ans✓✓✓-10
AMPS


1. BASED ON ABYC STANDARDS, CABLE ATTACHMENTS TO BATTERIES WITH
WING-TYPE NUTS ARE ALLOWED AS LONG AS THE WIRE GAUGE DOES NOT
EXCEED? Ans✓✓✓-8 AWG


1. BASED ON THIS SECTION, THE MOST COMMON ELECTRICAL CIRCUIT PROBLEM
IN MARINE APPLICATIONS IS: Ans✓✓✓-UNWANTED OPEN


1. BASED ON WHAT THIS SECTION HAS TOLD YOU, THE TOOL OF CHOICE TODAY
FOR TRACING SHORTED AND OPEN CIRCUITS IS THE: Ans✓✓✓-TDR

, 1. CONDUCTORS #8 AWG AND LARGER SHALL BE PERMITTED TO BE CONNECTED
IN PARALLEL Ans✓✓✓-WHERE THE AMPACITY OF EACH INDIVIDUAL
CONDUCTOR IS SUFFICIENT TO CARRY THE ENTIRE LOAD CURRENT SHARED BY
THE PARALLEL CONDUCTORS


1. DC GROUNDED CONDUCTORS ON NEW BOATS THAT ARE ALSO EQUIPPED
WITH AC SYSTEMS SHOULD USE __________ INSULATION Ans✓✓✓-YELLOW


1. EXCESSIVE ELECTRICAL RESISTANCE CAN BE CAUSED BY: Ans✓✓✓-
UNDERSIZED WIRE, LOOSE CONNECTIONS AND CORROSION


1. FOR THE SAME LENGTH OF WIRE, A 12- GAUGE WIRE WILL SAFELY CARRY
MORE_________ THAN A 16 GAUGE WIRE Ans✓✓✓-AMPERAGE


1. FRICTION CONNECTORS ARE REQUIRED TO PASS A MINIMUM ___________
PULL TEST ACCORDING TO ABYC E-11. Ans✓✓✓-6 POUNDS


1. FROM THE ELECTRICAL DIAGRAM SYMBOLS SHOWN BELOW, SELECT THE
SYMBOL THAT ILLUSTRATES A VARIABLE RESISTOR: Ans✓✓✓-variable resistor


1. HOW MANY OHMS ARE USED TO LIMIT A CURRENT TO 1.2 AMP WITH 0.240
KV? Ans✓✓✓-200 OHMS (V=(I)(R), 240 = (1.2) (R), R= 240/1.2)


1. HOW MUCH CURRENT SHOULD FLOW THROUGH THE DC GROUNDING
CONDUCTOR IN A 25-AMP DC MOTOR CIRCUIT? Ans✓✓✓-0 AMPS