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SOS Mechanic Certificate - Electrical
Questions and Correct Answers
After installing a new battery how long should you wait to allow
for pcm time Ans: no need to wait
As blower motor speed decreases the voltage drop across the
resistance block.... Ans: increases
What should you do first when replacing junction block or fuse?
Ans: Unlock the battery ground cable
The polarity of the voltage applied to the electromagnetic coils of
an actual working DC motor is.... Ans: a commutator
When performing a volt drop test the volt meter setting should be
set to the following.. Ans: 3 volts
The symbol at the RIGHT represents..... Ans: a relay
Which device is used to monitor throttle position on the computer
Ans: potentiometer
A reading of .8 volts on the volt meter #2 would indicate..... Ans:
excessive resistance
In a conventional wiring diagram a dot at the enter section Ans:
Splice
After replacement of a defective blower motor the teen found
motor spins but no air? Ans: reversed polarity to the motor
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Which piece of test equipment must be connected parallel Ans:
Volt meter
A vehicles blower motor only works on high..... Ans: blower
resistor
The component D in the following Ans: lamp
Which one of the following component can be damaged by
electrical discharge Ans: all of the above
An am-meter should be connected in which of the following Ans:
In series with the load
Direct transmitter controlled switches of a component Ans: less
current, high frequency
The following symbol at the right Ans: Diode ->}-
A technician finds a horn relay that is stuck closed Ans: the horn
is constantly blowing
A fusable link can be tested with... Ans: all of the above
In the circuit below the left front + left rear turn signals Ans:
excessive resistance at point b
When testing a remote mounted starter relay Ans: When testing a
remote mounted starter relay
An ohm meter Ans: can be connected without regard to polarity,
unless electrical contains a diode
© 2025 All rights reserved
SOS Mechanic Certificate - Electrical
Questions and Correct Answers
After installing a new battery how long should you wait to allow
for pcm time Ans: no need to wait
As blower motor speed decreases the voltage drop across the
resistance block.... Ans: increases
What should you do first when replacing junction block or fuse?
Ans: Unlock the battery ground cable
The polarity of the voltage applied to the electromagnetic coils of
an actual working DC motor is.... Ans: a commutator
When performing a volt drop test the volt meter setting should be
set to the following.. Ans: 3 volts
The symbol at the RIGHT represents..... Ans: a relay
Which device is used to monitor throttle position on the computer
Ans: potentiometer
A reading of .8 volts on the volt meter #2 would indicate..... Ans:
excessive resistance
In a conventional wiring diagram a dot at the enter section Ans:
Splice
After replacement of a defective blower motor the teen found
motor spins but no air? Ans: reversed polarity to the motor
© 2025 All rights reserved
, 2 | Page
Which piece of test equipment must be connected parallel Ans:
Volt meter
A vehicles blower motor only works on high..... Ans: blower
resistor
The component D in the following Ans: lamp
Which one of the following component can be damaged by
electrical discharge Ans: all of the above
An am-meter should be connected in which of the following Ans:
In series with the load
Direct transmitter controlled switches of a component Ans: less
current, high frequency
The following symbol at the right Ans: Diode ->}-
A technician finds a horn relay that is stuck closed Ans: the horn
is constantly blowing
A fusable link can be tested with... Ans: all of the above
In the circuit below the left front + left rear turn signals Ans:
excessive resistance at point b
When testing a remote mounted starter relay Ans: When testing a
remote mounted starter relay
An ohm meter Ans: can be connected without regard to polarity,
unless electrical contains a diode
© 2025 All rights reserved
