Electrical Power and Ohm's Law Quiz

NFPA 704 Diamond

• The blue section of the NFPA 704 Diamond represents health hazards or safety considerations.

Crimp Tool Positioning

• The jaw of a crimp tool should be positioned perpendicular to the seam of the crimp connector.

CEA Standard Color Code

• A solid orange wire (no stripes) in a CEA standard color code compliant wiring harness adapter represents illumination or function wires.

Troubleshooting Noise Problems

• The 3 MECP recommended steps to troubleshooting noise problems are:
  • Identify the source of the noise
  • Isolate the noise
  • Eliminate the noise

GPS Antenna Installation

• According to the MECP Basic Installation Technician Study Guide, the recommended practice for installation of a GPS antenna is to install it in a location that provides an unobstructed view of the horizon.

DMM Settings

• The Ohms (Ω) setting of a DMM is used to determine the various values of each key switch position in a low current (MUX) ignition circuit.

Ohm's Law

• The correct formula for finding voltage using Ohm's Law is V=I×R, where V is voltage, I is current, and R is resistance.

Primary Source of Power

• The primary source of power for the electrical system and any electrical accessories while the engine is running in a combustion engine vehicle is the alternator.

Measuring Audio Output Level

• A DMM should be set to AC Volts (VAC) to measure the audio output level of an amplifier at the speaker terminals.

Parallel Resistance

• When two 4 ohm loads are connected in parallel, the total resistance decreases to 2 ohms.