CM 411 EXAM 1 (ACTUAL 2025/2026) FLASHCARDS CAL POLY
CM 411 ELECTRICAL MIDTERM QUESTIONS AND ANSWERS
Assume that you have a 120 volt circuit with 2 lights (of equal
resistance) connected in a series. What is the voltage across
each light? - ---Answers---60
Which of the following is true? - ---Answers---Moving a wire
through a magnetic field causes a current to flow into the wire
A(n) ______ changes AC to DC - ---Answers---rectifier
A(n) ______ changes DC to AC - ---Answers---inverter
From your site plan reading assignment, what was the
minimum burial depth indicated on the drawings for power
conduits? - ---Answers---Not shown on drawings
From your site plan reading assignment, what is/are the
size(s) of the electrical power conductors shown on the single
line diagram between the manholes and building? - ---
Answers---500 kcmil and #2 AWG
From your lighting plan take-off, what type(s) of conduit
was/were used? - ---Answers---EMT and flexible metal
conduit
, From your lighting plan take-off, what size conduit was used?
- ---Answers---¾"
From your lighting plan take-odd, how many neutral
conductors were used for the electrical home-runs? - ---
Answers---one
From your lighting plan take-off, what size wire was used? - -
--Answers---12 AWG
A building may have: - ---Answers---One system ground at
the service only
Types of grounds include: - ---Answers---A copper ground
rod, a metal cold water pipe, or a UFER ground
Locations where a GFCI is required by code include: - ---
Answers---Bathrooms and Outdoors
Which is capable of providing a large amount of current, a
short circuit (line-to-line) fault or a ground fault? - ---
Answers---Short circuit
What are the TWO internal devices inside a GFCI? - ---
Answers---an Ammeter & a Circuit Breaker
CM 411 ELECTRICAL MIDTERM QUESTIONS AND ANSWERS
Assume that you have a 120 volt circuit with 2 lights (of equal
resistance) connected in a series. What is the voltage across
each light? - ---Answers---60
Which of the following is true? - ---Answers---Moving a wire
through a magnetic field causes a current to flow into the wire
A(n) ______ changes AC to DC - ---Answers---rectifier
A(n) ______ changes DC to AC - ---Answers---inverter
From your site plan reading assignment, what was the
minimum burial depth indicated on the drawings for power
conduits? - ---Answers---Not shown on drawings
From your site plan reading assignment, what is/are the
size(s) of the electrical power conductors shown on the single
line diagram between the manholes and building? - ---
Answers---500 kcmil and #2 AWG
From your lighting plan take-off, what type(s) of conduit
was/were used? - ---Answers---EMT and flexible metal
conduit
, From your lighting plan take-off, what size conduit was used?
- ---Answers---¾"
From your lighting plan take-odd, how many neutral
conductors were used for the electrical home-runs? - ---
Answers---one
From your lighting plan take-off, what size wire was used? - -
--Answers---12 AWG
A building may have: - ---Answers---One system ground at
the service only
Types of grounds include: - ---Answers---A copper ground
rod, a metal cold water pipe, or a UFER ground
Locations where a GFCI is required by code include: - ---
Answers---Bathrooms and Outdoors
Which is capable of providing a large amount of current, a
short circuit (line-to-line) fault or a ground fault? - ---
Answers---Short circuit
What are the TWO internal devices inside a GFCI? - ---
Answers---an Ammeter & a Circuit Breaker
