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OEC > Closed Book 2 > Flashcards

Closed Book 2 Flashcards

1
Q

Your foreman asked you to measure the insulation resistance of some conductors. To do this you would use a _____.

A) hydrometer
B) megger
C) ball tester
D) wattmeter

A

Megger

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2
Q

The main difference between a pipe thread and machine thread is that a pipe thread is _____.

A) finer
B) longer
C) uneven
D) tapered

A

Tapered

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3
Q

Receptacles in residential wiring are regularly connected in _____.

A) parallel
B) perpendicular
C) series
D) diagonal

A

Parallel

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4
Q

A foreman in charge of a crew of men preparing to work on a low voltage tension circuit should caution them to _____.

A) work only when the load is zero
B) consider the circuit hot at all times
C) never work on any circuit alone
D) wait until the circuit has been killed

A

Consider the circuit hot at all times

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5
Q

The term pneumatic refers to _____.

A) electricity
B) steam
C) air
D) oil

A

Air

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6
Q

What type of fastener would you use to mount a box to a hollow tile while?

A) expansion bolts
B) toggle bolts
C) rawl plugs
D) bolts with backing plate

A

Toggle bolts

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7
Q

Which of the following locations would most likely require the installation of a ground fault circuit interruptor?

A) living room
B) closet
C) bedroom
D) bathroom

A

Bathroom

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8
Q

The lubricant used to make pulling wires through a conduit easier is _____.

A) grease
B) powdered pumice
C) vaseline
D) powdered soapstone

A

Powdered soapstone

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9
Q

The instrument by which electric power is measured is a _____.

A) ammeter
B) rectifier
C) voltmeter
D) wattmeter

A

Wattmeter

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10
Q

The connection between the grounded circuit conductor and the equipment grounding conductor at the service is called the _____ bonding jumper.

A) circuit
B) equipment
C) main
D) appliance

A

Main

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11
Q

The larger the conductor, the _____.

A) higher the resistance
B) lower the ampacity
C) higher the voltage
D) lower the resistance

A

Lower the resistance

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12
Q

A hook at the end of a fish tape is NOT to _____.

A) keep it from scratching on joints and bends
B) tie a swab to
C) tie the wires, to be pulled
D) protect the end of the wire

A

Protect the end of the wire

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13
Q

Know the difference between an LL and LR conduit body

A
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14
Q

When soldering two copper conductors together, they are kept clean while heating by _____.

A) the use of flux
B) applying the solder quickly
C) rubbing often with emery cloth
D) not permitting the open flame to touch them

A

The use of flux

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15
Q

Metal cabinets used for lighting circuits are grounded to _____.
A) reduce shock hazard
B) eliminate electrolysis
C) assure that the fuse will blow in a defective circuit
D) simplify the wiring

A

Reduce shock hazard

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16
Q

In sockets, extension cord is protected by means of the _____ knot.

A) underwriters’
B) clove hitch
C) sheepshank
D) western union

A

Underwriters’

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17
Q

A branch circuit that supplies a number of outlets for lighting and power is a/an _____ branch circuit.

A) individual
B) multi-purpose
C) general purpose
D) utility

A

General purpose DEF 100

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18
Q

When three equal reistors are connected inparallel, the total resistance is _____.

A) equal to the resistance of each
B) less than any resistor
C) greater than any one resistor
D) none of these

A

Less than any one resistor

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19
Q

The efficiency of a motor is a measure of _____.

A) the natural speed of the motor
B) the torque the motor produces
C) how well it converts electrical energy into mechanical energy
D) the power output of the motor in horsepower

A

How well it converts electrical energy into mechanical energy

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20
Q

When stripping insulation from an aluminum conductor _____.

I. remove insulation as you would sharpen a pencil
II. Ring the conductor and slip the insulation off the conductor
III. peel the insulation back and then cut backwards

A) I, II and III
B) I and II only
C) I and III only
D) II and III only

A

I and III only

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21
Q

The _____ angle is the angle between the real power and apparent power.

A) lag
B) power factor
C) voltage-current
D) watt

A

Power factor

22
Q

The most heat is created when current flows through which of the following?

A) a 10 ohm condenser
B) a 10 ohm inductance coil
C) a 10 ohm resistor
D) heat would be equal

A

10 ohm resistor

23
Q

60 cycle frequency travels 180 degrees in how many seconds?

A) 1/60
B) 1/120
C) 1/180
D) 1/30

A

1/120

24
Q

The current carrying capacity of conductors expressed in amperes is _____.

A) demand
B) pressure
C) ampacity
D) duty-cycle

A

Ampacity DEF 100

25
Q

The electricians tapered reamer is used for _____.
A) reaming the threads in couplings
B) reaming the holes in bushings
C) reaming the ends of rigid consuit after it is cut
D) making holes in boxes

A

Reaming the ends of rigid conduit after it is cut

26
Q

Electricity is sold by the kilowatt which is _____ watts.

A) 10,000
B) 1000
C) 100
D) 100,000

A

1000

27
Q

Three way switching does not use the folloing conductor:

A) ungrounded
B) traveler
C) grounded
D) switch leg

A

Grounded 402.2(A)

28
Q

The greater the number of free elwcteons, the better the _____ of a metal.

A) insulation value
B) resistance
C) voltage drop
D) conductivity

A

Conductivity

29
Q

To cut wiremold you would _____.

A) use a chisel
B) use an approved cutter like an MM cutter
C) use a pair of snips
D) use a hacksaw and remove the burr with a file

A

Hacksaw and a file

30
Q

Electrical contacts that are open or closed when the electrical current energizes the coils of a device are called _____.

A) thermostat
B) reactor
C) condenser
D) relay

A

Relay

31
Q

A clamp on ammeter will measure _____.

A) voltage when clamped on a single conductor
B) current when clamped on a multi conductor cable
C) accurately only when parallel to a cable
D) accurately only when clamped perpindicular to a conductor

A

Accurately only when clamped perpindicular to a conductor

32
Q

When current leaves its intended path and returns to the source bypassing the load the circuit is _____.

A) open
B) shorted
C) incomplete
D) broken

A

Shorted

33
Q

The electric pressure or electromotive force is measured by the _____.

A) volt
B) eletric meter
C) watt
D) kilowatt

A

Volt

34
Q

Conduit installed in a concrete slab is considered a _____.

A) damp location
B) moist location
C) wet location
D) dry location

A

Wet location

35
Q

It is best as a safety measure, not to use water to extinguish electrical equipment fires. The main reason is that water _____.

A) may transmit shock back to the user
B) will turn to steam
C) will not put the fire out
D) may damage the wiring

A

May transmit shock to the user

36
Q

The total opposition to current flow in an AC circuit is expressed in ohms and is called _____.

A) impedance
B) conductance
C) reluctance
D) resistance

A

Impedance

37
Q

Know what a rotometer is

A
38
Q

When a person is burned, the basic care steps are ______.

A) cover and cool the burn
B) prevent infection
C) care for shock
D) all of these

A

All of these

39
Q

A multimeter is a combonation of _____.

A) ammeter ohmmeter and wattmeter
B) voltmeter, ohmmeter and ammeter
C) voltmeter, ammeter and megger
D) voltmeter, wattmeter and ammeter

A

Voltmete, ohmmeter and ammeter

40
Q

A good magnetic material is _____.

A) brass
B) copper
C) iron
D) aluminum

A

Iron

41
Q

Since fuses are rated by an amperage and voltage, a fuse will work on ______.

A) AC only
B) AC or DC
C) DC only
D) any voltage

A

AC or DC

42
Q

A fuse puller is used in replacing _____.

A) cartridge fuses
B) plug fuses
C) link fuses
D) ribbon fuses

A

Cartridge fuses

43
Q

A pendant fizture is a ______.

A) hanging fixture
B) recessed fixture
C) bracket fixture
D) none of these

A

Hanging fixture

44
Q

To fasten an outlet box between the studs in a wall constructed of metal lath and plater, you would use _____.

A) cement or mortar
B) iron wire
C) nylon lath or twine
D) an approved box hanger

A

An approved box nanger

45
Q

The unit of measure for electrical resistance to current is the _____.

A) watt
B) ohm
C) volt
D) amp

A

Ohm

46
Q

A low energy power circuit ______.

A) is a remote control circuit
B) is a signal circuit
C) has its power supplied by transformers and batteries
D) none of these

A

Supplied by transformers and batteries

47
Q

To convert AC to DC you will use a _____.

A) generator
B) rectifier
C) vibrator
D) auto transformer

A

Rectifier

48
Q

S, is a symbol used on a drawing to indicate a _____ switch.

A) flush
B) single pole
C) four-way
D) three-way

A

Single pole

49
Q

Action requiring personal intervention for its control:

A) controller
B) automatic
C) periodic duty
D) non automatic

A

Non automatic

50
Q

A voltmeter is connected in _____ with the load.

A) series
B) parallel
C) series-parallel
D) series-shunt

A

Parallel

OEC (5 decks)

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