Quiz about pm 6

Question 1

An atomic nucleus consists of balanced numbers of protons and neutrons and, therefore, has no electrical charge.

Accepted Answer

false

Answer

true

Question 2

The tendency for electrons to jump from one atom to another makes electricity possible.

Accepted Answer

true

Answer

false

Question 3

n ampere is a unit of measure related to a certain number of electrons passing a given point per second.

Accepted Answer

true

Answer

false

Question 4

Ohm's law states that current in a circuit is proportional to the voltage and the resistance.

Accepted Answer

flase

Answer

true

Question 5

Electrical power is measured in watts (W).

Accepted Answer

true

Answer

false

Question 6

The power formula is the relationship between ___ in a circuit.

Accepted Answer

power, voltage, and current

Answer

power, polarity, and conductivity

Answer

power, resistance, and voltage

Answer

power, resistance, and current

Question 7

A conductor is a material that has little ___ .

Accepted Answer

resistance

Answer

electrical charge

Answer

insulation

Answer

polarity

Question 8

A(n) ___ is a subatomic particle that has a positive electrical charge of one unit.

Accepted Answer

proton

Answer

neutron

Answer

electron

Answer

atom

Question 9

Current is measured in ___ .

Accepted Answer

amperes

Answer

volts

Answer

ohms

Answer

watts

Question 10

A(n) ___ is a subatomic particle that has a negative electrical charge of one unit.

Accepted Answer

electron

Answer

proton

Answer

neutron

Question 11

6.2.1. No electrical work is done in an open circuit.

Accepted Answer

false

Answer

true

Question 12

6.2.2. Voltage is the same throughout a series circuit.

Accepted Answer

false

Answer

true

Question 13

6.2.3. Ampacity is the amount of current that a conductor can safely carry.

Accepted Answer

true

Answer

false

Question 14

6.2.4. Larger AWG numbers indicate larger diameter conductors.

Accepted Answer

false

Answer

true

Question 15

6.2.5. Most industrial electrical circuits are strictly parallel circuits.

Accepted Answer

false

Answer

true

Question 16

6.2.1. A ___ is a device that uses electricity, such as a lamp, heating element, or motor, to produce a useful output.

Accepted Answer

load

Answer

conductor

Answer

circuit

Answer

breaker

Question 17

6.2.2. ___ is the reduction of circuit voltage caused by the resistance of circuit conductors and loads.

Accepted Answer

voltage drop

Answer

short ciruitting

Answer

insulation

Answer

grounding

Question 18

6.2.3. Circuit ___ is the set of operational characteristics of a circuit as determined by the arrangement of switch devices.

Accepted Answer

logic

Answer

display

Answer

functionality

Answer

dirtribution

Question 19

6.2.4. A grounding conductor has ___ insulation or is bare and is connected to a metal grounding electrode.

Accepted Answer

green

Answer

white

Answer

grey

Answer

black

Question 20

6.2.5. Two or more switches connected in parallel form what is called ___ logic.

Accepted Answer

AND

Answer

OR

Answer

SERIES

Answer

SAFETY

Question 21

6.3.1. A generator is an electrical component that converts AC to DC by allowing voltage and current to flow in only one direction.

Accepted Answer

false

Answer

true

Question 22

6.3.2. Three-phase circuits do not always require a neutral wire.

Accepted Answer

true

Answer

false

Question 23

6.3.3. All points in an AC circuit have polarity.

Accepted Answer

false

Answer

true

Question 24

6.3.4. In three-phase AC voltage, the coils are out-of-phase with each other.

Accepted Answer

true

Answer

false

Question 25

6.3.5. Larger emergency generators are usually powered by diesel engines.

Accepted Answer

true

Answer

false

Question 26

6.3.1. A ___ is an electric device that converts mechanical energy into electrical energy by means of electromagnetic induction.

Accepted Answer

generator

Answer

paelboard

Answer

rectifier

Answer

load

Question 27

6.3.2. Frequency is measured in cycles per second, or ___ .

Accepted Answer

hertz

Answer

volts

Answer

waves

Answer

watts

Question 28

6.3.3. Three-phase AC voltage is a combination of three alternating voltage waveforms, each displaced ___ electrical degrees apart.

Accepted Answer

120

Answer

60

Answer

90

Answer

180

Question 29

6.3.4. A ___ is a piece of equipment that breaks down incoming electrical power into smaller units for distribution throughout a building.

Accepted Answer

switchboard

Answer

disconnect

Answer

lighting panel

Answer

busway

Question 30

6.4.1. Voltage measurements are used to determine the amount of circuit loading or the condition of an electrical component (load).

Accepted Answer

false

Answer

True

Question 31

6.4.2. A clamp-on probe does not need to touch a conductor to measure current.

Accepted Answer

true

Answer

false

Question 32

6.4.3. Always disconnect the potentially energized (red) test lead first.

Accepted Answer

true

Answer

false

Question 33

6.4.4. Location is not factor that affects CAT ratings.

Accepted Answer

false

Answer

true

Question 34

6.4.5. Voltage indicators do not indicate the type or level of voltage, only that voltage is present.

Accepted Answer

true

Answer

false

Question 35

6.4.1. A ___ is a test instrument that indicates the presence of voltage when the test tip is near an energized conductor or metal part.

Accepted Answer

voltage indicator

Answer

circuit analyzer

Answer

digital multimeter

Answer

megohmmter

Question 36

6.4.2. A ___ is used to measure the very high resistances of insulating components.

Accepted Answer

megohmmeter

Answer

digital multimeter

Answer

continuity tester

Answer

circuit analyzer

Question 37

6.4.3. A(n) ___ value is the result of a sequence of calculations applied to a changing value that provides an overall, or effective, representation of the waveform.

Accepted Answer

root mean square

Answer

peak

Answer

MIN/MAX

Answer

relative

Question 38

6.4.4. The ___ function establishes a baseline value and displays the current measurement as a positive or negative difference from that baseline.

Accepted Answer

RELATIVE

Answer

MIN/MAX

Answer

HOLD

Answer

PEAK

Question 39

6.4.5. Resistance is displayed on a meter as ___ .

Accepted Answer

ohms

Answer

volts

Answer

watts

Answer

amperes

Question 40

6.5.1. Small voltage fluctuations typically cause significant circuit and load problems.

Accepted Answer

false

Answer

true

Question 41

6.5.2. The fundamental line frequency in the United States is 60 Hz.

Accepted Answer

true

Answer

false

Question 42

6.5.3. Lightning is the most common source of transient voltages on utility power distribution systems.

Accepted Answer

false

Answer

true

Question 43

6.5.5. Typically, for every 1% of voltage unbalance, current unbalance is 4% to 8%.

Accepted Answer

false

Answer

true

Question 44

6.5.1. A ___ voltage is a temporary, undesirable voltage spike that ranges from a few volts to several thousand volts and lasts from a few microseconds up to a few milliseconds.

Accepted Answer

transient

Answer

transverse

Answer

transparent

Answer

translucent

Question 45

6.5.2. A voltage sag is a drop in voltage of more than ___ % (but not to 0 V) below the normal rated line voltage that lasts from 0.5 cycles up to 1 min.

Accepted Answer

10

Answer

2

Answer

5

Answer

25

Question 46

6.5.3. A voltage ___ is an increase in voltage of more than 10% above the normal rated line voltage that lasts from 0.5 cycles up to 1 min.

Accepted Answer

swell

Answer

wave

Answer

surge

Answer

transient

Question 47

6.5.4. A ___ power interruption is a decrease in voltage to O V that lasts from 3 sec to 1 min.

Accepted Answer

temporary

Answer

momentary

Answer

sustained

Answer

dropped

Question 48

6.5.5. ___ is the complete loss of one phase on a 3? power supply.

Accepted Answer

single phasing

Answer

voltage unbalance

Answer

phase unbalance

Answer

improper phase sequence

Question 49

6.6.1. A bimetallic strip is made of two dissimilar metals that expand at the same rate when heated.

Accepted Answer

false

Answer

truth

Question 50

6.6.2. High-intensity discharge (HID) lamps require several minutes to begin emitting light and most produce a humming sound from their ballasts.

Accepted Answer

true

Answer

flase

Question 51

6.6.3. An induction motor is a motor that rotates due to the interaction between the magnetic fields of the stator and rotor.

Accepted Answer

true

Answer

false

Question 52

6.6.4. In a step-up transformer, the secondary coil has more turns of wire than the primary coil.

Accepted Answer

false

Answer

true

Question 53

6.6.5. A solenoid is a relay designed for high-current loads.

Accepted Answer

false

Answer

true

Question 54

6.6.1. A ___ is an OCPD with a metal strip that quickly melts and opens a circuit when the current flowing through the strip is greater than the rating of the fuse.

Accepted Answer

fuse

Answer

cb

Answer

switch

Answer

lamp

Question 55

6.6.2. ___ occurs when contacts do not close, do not open, or offer resistance to current flow.

Accepted Answer

contact failure

Answer

power interruption

Answer

voltage drop

Answer

time delay

Question 56

6.6.3. A(n) ___ switch is a switch that is operated by the movement of an object.

Accepted Answer

mechanical

Answer

manual

Answer

automatic

Answer

semi-automatic

Question 57

6.6.4. A(n) ___ lamp is an electric lamp that produces light as electricity passes through a gas.

Accepted Answer

fluorescent

Answer

incandescent

Answer

light-emitting diode (LED)

Answer

electroluminescent

Question 58

6.6.5. A(n) ___ is the moving part of a coil-operated device.

Accepted Answer

rotor

Answer

drive

Answer

armature

Answer

relay

Question 59

6.7.1. Line diagrams are commonly used for power circuits, and wiring diagrams are commonly used for low-voltage control circuits.

Accepted Answer

false

Answer

true

Question 60

6.7.2. Solid black dots at line intersections mean that the wires are connected electrically.

Accepted Answer

true

Answer

false

Question 61

6.7.3. Frequently, solid lines are drawn around certain sections of a wiring diagram to identify that portion as a group.

Accepted Answer

false

Answer

true

Question 62

6.7.1. In a diagram, wires crossing without a dot, or with one wire drawn as jumping" over the other

Accepted Answer

no electrical connection

Answer

a terminal connected to both wires

Answer

a splice connecting the wires together

Answer

a mistake in the wiring

Question 63

6.7.2. By convention, terminal 1 is always the ___ source conductor.

Accepted Answer

ungrounded

Answer

grounded

Answer

neutral

Answer

cold

Question 64

6.7.3. The wiring diagram of a standard start-stop station shows the motor starter and its wiring with ___ lines to identify it as part of the power circuit.

Accepted Answer

thick

Answer

ladder

Answer

red

Answer

dashed

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