MECP Basic Exam 2025 Questions
and Answers
What is ohms law? - ANSWER✔✔-Uses a mathematical formula to descibe a specific
and measurable relationship between voltage, current, and resistance
What is an arming delay? - ANSWER✔✔-A term used to describe the elapsed time
between the moment a security system is first told to arm and the moment it is actually
armed. This normally only applies to systems that are passively armed, but can apply to
actively armed systems as well
What is resistance? - ANSWER✔✔-The opposition to current flow
What is an ohm? - ANSWER✔✔-The unit of measurement for electrical resistance
named after Georg Simon Ohm
In Ohm's Law, what is current symbolized as? - ANSWER✔✔-"A" for ampere or "I" for
"intensity" of the electron flow
What is required for current flow? - ANSWER✔✔-Voltage
, What is rectification? - ANSWER✔✔-The process of turning AC into (pulsing) DC
What is an alternator? - ANSWER✔✔-A mechanically driven automotive device that
generates AC electricity & is rectified into DC to power the electrical accessories in the
vehicle. The alternator is the primary source of vehicle power while the engine is
running.
What is frequency measured in? - ANSWER✔✔-Cycles per second, or Hertz (Hz)
What is "DC"/Direct Current? - ANSWER✔✔-Current that supplies power to electronic
components, & is either positive or negative in polarity, but not both
What is "AC"/Alternating Current? - ANSWER✔✔-Current that alternates polarity (or
it's magnetic field) between positive and negative
What is the difference between AC & DC electrical current? - ANSWER✔✔-AC
periodically reverses direction of electrons flowing (back and forth), while DC always
flows in only one direction
What is a coulomb? - ANSWER✔✔-An amount of electrical charge which contains
6.24x1018 (6,240,000,000,000,000,000) electrons. One coulomb per second past a given
point is equal to 1 amp of current flowing
How is current flow measured? - ANSWER✔✔-In units called amperes or "amps" for
short
and Answers
What is ohms law? - ANSWER✔✔-Uses a mathematical formula to descibe a specific
and measurable relationship between voltage, current, and resistance
What is an arming delay? - ANSWER✔✔-A term used to describe the elapsed time
between the moment a security system is first told to arm and the moment it is actually
armed. This normally only applies to systems that are passively armed, but can apply to
actively armed systems as well
What is resistance? - ANSWER✔✔-The opposition to current flow
What is an ohm? - ANSWER✔✔-The unit of measurement for electrical resistance
named after Georg Simon Ohm
In Ohm's Law, what is current symbolized as? - ANSWER✔✔-"A" for ampere or "I" for
"intensity" of the electron flow
What is required for current flow? - ANSWER✔✔-Voltage
, What is rectification? - ANSWER✔✔-The process of turning AC into (pulsing) DC
What is an alternator? - ANSWER✔✔-A mechanically driven automotive device that
generates AC electricity & is rectified into DC to power the electrical accessories in the
vehicle. The alternator is the primary source of vehicle power while the engine is
running.
What is frequency measured in? - ANSWER✔✔-Cycles per second, or Hertz (Hz)
What is "DC"/Direct Current? - ANSWER✔✔-Current that supplies power to electronic
components, & is either positive or negative in polarity, but not both
What is "AC"/Alternating Current? - ANSWER✔✔-Current that alternates polarity (or
it's magnetic field) between positive and negative
What is the difference between AC & DC electrical current? - ANSWER✔✔-AC
periodically reverses direction of electrons flowing (back and forth), while DC always
flows in only one direction
What is a coulomb? - ANSWER✔✔-An amount of electrical charge which contains
6.24x1018 (6,240,000,000,000,000,000) electrons. One coulomb per second past a given
point is equal to 1 amp of current flowing
How is current flow measured? - ANSWER✔✔-In units called amperes or "amps" for
short
