CM 411 EXAM 1 ACTUAL FLASHCARDS CAL POLY

CM 411 EXAM 1 (ACTUAL / ) 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

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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

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