Electrical and Electronic Systems Flashcards
7 cards from real NAPA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Electrical and Electronic Systems flashcards as text
Three resistors of 2, 4, and 6 ohms are connected in series across 12 V. What is the circuit current?
Answer: 1 A
Total resistance is 12 ohms, and 12 V ÷ 12 ohms = 1 A.
Two 6-ohm resistors are connected in parallel. What is the total resistance?
Answer: 3 ohms
Equal parallel resistors give total resistance equal to one value divided by their number: 6 ÷ 2 = 3 ohms.
A 12 V circuit draws 5 A. How much power does the load consume?
Answer: 60 W
Power equals volts times amps: 12 × 5 = 60 W.
A customer says the left turn signal flashes much faster than normal. What is the most likely cause?
Answer: A burned-out turn signal bulb on the left side
Reduced current from a burned-out bulb makes a thermal flasher cycle faster.
On hybrid and electric vehicles, high-voltage cables are identified by what color?
Answer: Orange
Industry standard identifies high-voltage cabling in orange.
Headlights are dim and the headlight feed voltage is normal. What test best locates the problem?
Answer: Voltage drop test on the ground side
Normal feed voltage with dim lights points to resistance on the ground side, found by voltage drop testing.
Which wire gauge can safely carry the most current?
Answer: 10 AWG
In the AWG system, a lower number means a larger wire that can carry more current.