MECP Basic UPDATED Exam Questions
and CORRECT Answers
Alternating Current (AC) - CORRECT ANSWER - Energy that alternates back and forth at a
certain frequency that is measured in hertz.
(IMPORTANT): Audio signals are also measured in AC.
Accessory Power - CORRECT ANSWER - The source of power that gives 12 volts when the
ignition key is in the ACC, and RUN positions, BUT NOT at START.
Alternator - CORRECT ANSWER - Generates AC voltage, and rectifies it into DC Voltage,
The alternator is the primary source of the vehicles power while the engine is running.
Anode - CORRECT ANSWER - The positive pole of a diode
Bandpass Filter - CORRECT ANSWER - A device which incorporates both high-pass and
low-pass filters in order to limit both ends of the frequency range.
Bass - CORRECT ANSWER - Low audio frequency considered to be below 125 Hz.
BCM - CORRECT ANSWER - Body Control Module
Bluetooth - CORRECT ANSWER - Short-Range protocol allowing connections to wireless
devices on a 2.4 GHz band up to 30 feet.
Brain - CORRECT ANSWER - The common term used to refer to the main control unit of a
security system.
Cathode - CORRECT ANSWER - The negative pole of a diode
, Clipping - CORRECT ANSWER - Distortion that occurs when a power amplifier is over
driven. This can be seen visually on an oscilloscope. the peaks of a wave form are "clipped off"
at the signal's ceiling.
Crossover - CORRECT ANSWER - A device that separates the different frequency bands and
redirects them to different components.
Current - CORRECT ANSWER - The rate of electrical flow through a conductor between
objects of opposite charge, symbol is "i" or "A" measured in Amps.
Direct Current (DC) - CORRECT ANSWER - A flow of electrons that travels only in one
direction.
Decibel (dB) - CORRECT ANSWER - Used to measure the ratio between two power levels.
Diode - CORRECT ANSWER - A two-electrode device that allows a voltage to pass through
it in one direction only.
DIN - CORRECT ANSWER - Deutsche Industrie Norman. DIN refers to industrial standards
that are used in the manufacture of many goods in Europe, DIN refers to a standard headunit
dimension that fits into many cars.
DMM - CORRECT ANSWER - Digital Multimeter. Gives precise readings of voltage,
current, or ohms. this type of meter "samples" the input and feeds it to a digital readout.
ECM - CORRECT ANSWER - Electronic Control Module.
ECU - CORRECT ANSWER - Electronic Control Unit.
and CORRECT Answers
Alternating Current (AC) - CORRECT ANSWER - Energy that alternates back and forth at a
certain frequency that is measured in hertz.
(IMPORTANT): Audio signals are also measured in AC.
Accessory Power - CORRECT ANSWER - The source of power that gives 12 volts when the
ignition key is in the ACC, and RUN positions, BUT NOT at START.
Alternator - CORRECT ANSWER - Generates AC voltage, and rectifies it into DC Voltage,
The alternator is the primary source of the vehicles power while the engine is running.
Anode - CORRECT ANSWER - The positive pole of a diode
Bandpass Filter - CORRECT ANSWER - A device which incorporates both high-pass and
low-pass filters in order to limit both ends of the frequency range.
Bass - CORRECT ANSWER - Low audio frequency considered to be below 125 Hz.
BCM - CORRECT ANSWER - Body Control Module
Bluetooth - CORRECT ANSWER - Short-Range protocol allowing connections to wireless
devices on a 2.4 GHz band up to 30 feet.
Brain - CORRECT ANSWER - The common term used to refer to the main control unit of a
security system.
Cathode - CORRECT ANSWER - The negative pole of a diode
, Clipping - CORRECT ANSWER - Distortion that occurs when a power amplifier is over
driven. This can be seen visually on an oscilloscope. the peaks of a wave form are "clipped off"
at the signal's ceiling.
Crossover - CORRECT ANSWER - A device that separates the different frequency bands and
redirects them to different components.
Current - CORRECT ANSWER - The rate of electrical flow through a conductor between
objects of opposite charge, symbol is "i" or "A" measured in Amps.
Direct Current (DC) - CORRECT ANSWER - A flow of electrons that travels only in one
direction.
Decibel (dB) - CORRECT ANSWER - Used to measure the ratio between two power levels.
Diode - CORRECT ANSWER - A two-electrode device that allows a voltage to pass through
it in one direction only.
DIN - CORRECT ANSWER - Deutsche Industrie Norman. DIN refers to industrial standards
that are used in the manufacture of many goods in Europe, DIN refers to a standard headunit
dimension that fits into many cars.
DMM - CORRECT ANSWER - Digital Multimeter. Gives precise readings of voltage,
current, or ohms. this type of meter "samples" the input and feeds it to a digital readout.
ECM - CORRECT ANSWER - Electronic Control Module.
ECU - CORRECT ANSWER - Electronic Control Unit.
