Electrical Wiring, Connectors, and Wire Identification & Selection Review Questions with Complete Solutions Latest Update

Electrical Wiring, Connectors, and Wire Identification & Selection Review Questions with Complete Solutions Latest Update What is potting compound in regards to electrical connectors? - Answers a liquid plastic resin used to insulate and protect connectors from moisture What protection to wires and cables does conduit provide when used in aircraft installation? - Answers mechanical When a connector assembly is installed, which side should be the "hot" and which side the ground? - Answers Female pin is always on power "hot" side, male is the ground When approved, splices may be used to repair manufactured harnesses or installed wiring. What is the maximum number of splices permitted between any two connectors? - Answers one Which aluminum electrical cable sizes would be selected to replace a no. 10 copper electrical cable? - Answers Number 8 What is the minimum bend radii for an electrical wire bundle? - Answers No less than 10 times the diameter of largest cable in the bundle During inspection of the terminal strips of an aircraft electrical system, what should be determined? - Answers the terminal studs are anchored against rotation For general electrical use in aircraft, what is the acceptable method of attaching a terminal to a wire? - Answers crimping What standards are AN/MS electrical connectors specifically designed to meet? - Answers military specifications What is the maximum resistance allowed when testing a grounding/bonding strap? - Answers .003 ohm What is the purpose of grounding, which is electrically connecting a conductive object to the primary structure? - Answers prevent development of radio frequency potentials What is the maximum distance between adel clamps in a run of aircraft wiring? - Answers 24 inches What is a "LRU" - Answers line replaceable unit What is the max allowable number of nicked wire strands when using size 10 aluminum wire? - Answers 0 What is the recommended knot for starting a single cord wire lacing? - Answers clove hitch Why must aluminum wire be stripped very carefully? - Answers individual strands will break easily after being nicked What is the max allowable number of broken wire strands when using size 8 copper wire? - Answers 6 What is the number assigned to a size in the American wire gauge (AWG) system of numbers, used to designate electrical wire sizes, related to? - Answers cross-sectional area How many wire splices are allowed between a circuit breaker and a component? - Answers one What is the most common way an aircraft wire is terminated? - Answers ring terminal What class connector would be used when routing wire through a pressurized structure? - Answers Class Y If a wire is installed so that it comes in contact with some moving parts, what protection should be given the wire? - Answers pass through conduit If several long lengths of electrical cable are to be installed in rigid conduit, how will the possibility of damage to the cable as it is pulled through the conduit be reduced? - Answers Dusting the cable with powdered in soapstone What should be avoided in conduit installation? - Answers locate conduit to provide a footstep or handhold for personnel What is a drip loop? - Answers a droop in a wire bundle to allow moisture to drip off before entering a component or connector Where electric cables must pass through holes in bulkheads, formers, ribs, firewalls, etc., how should the wires be protected from chafing? - Answers by using a rubber grommet What is the purpose of electrical connectors in an aircraft system? - Answers to facilitate maintenance where frequent disconnection is required In addition to providing good current carrying capabilities, what are electric wire terminals for most aircraft applications designed primarily to do? - Answers to prevent circuit failure due to terminal disconnection What are solid center coax cables primarily used for? - Answers they shouldn't be used What is the method of attaching a pin or socket to an individual wire in a Molex type electrical connector? - Answers crimping What are the primary considerations when selecting electric cable size? - Answers current carrying capacity and allowable voltage drop What is the maximum amount of terminal lugs that are allowed to be attached to a single terminal stud? - Answers 4