MECP PRACTICE 2025/2026 EXAM
QUESTIONS AND ANSWERS | 100%
PASS
To find voltage drops on Amplifier grounds, what setting should be used on
the DMM while loading down and testing between the amplifier ground and
the vehicles chassis ground point? - 🧠 ANSWER ✔✔DC volts
If an insufficient ground in an amplifier and is measured under load (i.e.
While typical current is flowing), it will show a difference of potential
between which points listed? - 🧠 ANSWER ✔✔Between the (-) negative
battery post and the (-) negative input of the amplifier
Kirchhoff's Voltage Law (KVL) states which one of the following? - 🧠
ANSWER ✔✔The voltage applied to a DC series circuit must equal the
sum of the voltage drops within the circuit .
Inductors used in aftermarket mobile audio systems perform which one of
the functions listed as their primary purpose? - 🧠 ANSWER ✔✔Oppose a
change in current flow
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
1
,When wiring multiple relays to trigger from a single low current output, how
many 80 ohm coil relays can safely be connected at 12 volts if that output
that supplies 500mA current? - 🧠 ANSWER ✔✔3
Resistors used in aftermarket mobile audio systems perform which one of
the functions listed their primary purpose? - 🧠 ANSWER ✔✔Oppose current
flow.
What electrical unit expresses difference of potential in an electrical circuit?
- 🧠 ANSWER ✔✔Volts
As car batteries age, their internal impedance drops. - 🧠 ANSWER
✔✔False
A resistor with a value of 6.6K Ohm is an abbreviation for which value? - 🧠
ANSWER ✔✔6600 Ohms
How much electrical power consumption results from measured values of
14 volts and 8 amps? - 🧠 ANSWER ✔✔112 Watts
What type of electronic component has emitter, collector, and base
terminals? - 🧠 ANSWER ✔✔NPN Transistor
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
2
, AC ripple in a healthy automotive alternator is highest at idle (roughly 800
to 1000 RPM). - 🧠 ANSWER ✔✔False
What is the measured voltage on two 12v batteries connected in parallel as
pictured? - 🧠 ANSWER ✔✔12volts
If a diode is operating normally in a forward biased condition....? - 🧠
ANSWER ✔✔Positive current on the anode flows to the cathode
An inductance value of 1 Henry is equal to how many milliHenries (mH)? -
🧠 ANSWER ✔✔1000 mH
An inductance value of 1 Henry is equal to how many milliHenries (mH)? -
🧠 ANSWER ✔✔1000 millihenry
Which two terminals shown in the diagram of an SPDT automotive relay
are the coil terminals? - 🧠 ANSWER ✔✔A and E
Which two terminals shown in the diagram are the Normally Open and
Common terminals of an SPDT automotive relay? - 🧠 ANSWER ✔✔B and
D
Rectification of AC in a standard automotive alternator involves how many
phases of AC? - 🧠 ANSWER ✔✔3 phases
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
QUESTIONS AND ANSWERS | 100%
PASS
To find voltage drops on Amplifier grounds, what setting should be used on
the DMM while loading down and testing between the amplifier ground and
the vehicles chassis ground point? - 🧠 ANSWER ✔✔DC volts
If an insufficient ground in an amplifier and is measured under load (i.e.
While typical current is flowing), it will show a difference of potential
between which points listed? - 🧠 ANSWER ✔✔Between the (-) negative
battery post and the (-) negative input of the amplifier
Kirchhoff's Voltage Law (KVL) states which one of the following? - 🧠
ANSWER ✔✔The voltage applied to a DC series circuit must equal the
sum of the voltage drops within the circuit .
Inductors used in aftermarket mobile audio systems perform which one of
the functions listed as their primary purpose? - 🧠 ANSWER ✔✔Oppose a
change in current flow
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
1
,When wiring multiple relays to trigger from a single low current output, how
many 80 ohm coil relays can safely be connected at 12 volts if that output
that supplies 500mA current? - 🧠 ANSWER ✔✔3
Resistors used in aftermarket mobile audio systems perform which one of
the functions listed their primary purpose? - 🧠 ANSWER ✔✔Oppose current
flow.
What electrical unit expresses difference of potential in an electrical circuit?
- 🧠 ANSWER ✔✔Volts
As car batteries age, their internal impedance drops. - 🧠 ANSWER
✔✔False
A resistor with a value of 6.6K Ohm is an abbreviation for which value? - 🧠
ANSWER ✔✔6600 Ohms
How much electrical power consumption results from measured values of
14 volts and 8 amps? - 🧠 ANSWER ✔✔112 Watts
What type of electronic component has emitter, collector, and base
terminals? - 🧠 ANSWER ✔✔NPN Transistor
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
2
, AC ripple in a healthy automotive alternator is highest at idle (roughly 800
to 1000 RPM). - 🧠 ANSWER ✔✔False
What is the measured voltage on two 12v batteries connected in parallel as
pictured? - 🧠 ANSWER ✔✔12volts
If a diode is operating normally in a forward biased condition....? - 🧠
ANSWER ✔✔Positive current on the anode flows to the cathode
An inductance value of 1 Henry is equal to how many milliHenries (mH)? -
🧠 ANSWER ✔✔1000 mH
An inductance value of 1 Henry is equal to how many milliHenries (mH)? -
🧠 ANSWER ✔✔1000 millihenry
Which two terminals shown in the diagram of an SPDT automotive relay
are the coil terminals? - 🧠 ANSWER ✔✔A and E
Which two terminals shown in the diagram are the Normally Open and
Common terminals of an SPDT automotive relay? - 🧠 ANSWER ✔✔B and
D
Rectification of AC in a standard automotive alternator involves how many
phases of AC? - 🧠 ANSWER ✔✔3 phases
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
