Electrical 1.2 midterm practice #2

Electrical 1.2 midterm practice #2

Professional Development

10 Qs

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Electrical 1.2 midterm practice #2

Electrical 1.2 midterm practice #2

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Professional Development

Practice Problem

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andrew h

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10 questions

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1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

_____ voltage can originate from a single-phase generator.


Single-phase

Three-phase

Single-phase or Three-phase

none of these

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Voltages in a three-phase circuit originate from a _____ where the voltage of each phase wire is out-of-phase with each other by 120˚.


generator

transformer

motor

all of these

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Normally _____ means the contacts are closed when the coil is de-energized.

open


closed

powered

none of these

none of these

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

_____ transformers contain a primary and a secondary mounted on a single laminated iron core.

Single-phase

two-phase

three-phase

none of these

5.

FILL IN THE BLANK QUESTION

5 mins • 1 pt

The _____ windings of a three-phase delta/wye-connected transformer are connected end-to-end with each other.

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

In a delta/delta high-leg 4-wire system, the voltage between any two primary wires is known as the “_____ line-to-line voltage,” while the voltage between any two secondary wires is referred to as the “_____ line-to-line voltage.”

primary, primary

secondary, secondary

primary, secondary,

secondary, primary

7.

FILL IN THE BLANK QUESTION

5 mins • 1 pt

Inverse time circuit breakers have a(an) _____ trip unit that responds to short-circuit and ground-fault currents.

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