Closed Book 2 Flashcards
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
Megger
The main difference between a pipe thread and machine thread is that a pipe thread is _____.
A) finer
B) longer
C) uneven
D) tapered
Tapered
Receptacles in residential wiring are regularly connected in _____.
A) parallel
B) perpendicular
C) series
D) diagonal
Parallel
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
Consider the circuit hot at all times
The term pneumatic refers to _____.
A) electricity
B) steam
C) air
D) oil
Air
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
Toggle bolts
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
Bathroom
The lubricant used to make pulling wires through a conduit easier is _____.
A) grease
B) powdered pumice
C) vaseline
D) powdered soapstone
Powdered soapstone
The instrument by which electric power is measured is a _____.
A) ammeter
B) rectifier
C) voltmeter
D) wattmeter
Wattmeter
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
Main
The larger the conductor, the _____.
A) higher the resistance
B) lower the ampacity
C) higher the voltage
D) lower the resistance
Lower the resistance
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
Protect the end of the wire
Know the difference between an LL and LR conduit body
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
The use of flux
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
Reduce shock hazard
In sockets, extension cord is protected by means of the _____ knot.
A) underwriters’
B) clove hitch
C) sheepshank
D) western union
Underwriters’
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
General purpose DEF 100
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
Less than any one resistor
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
How well it converts electrical energy into mechanical energy
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
I and III only
The _____ angle is the angle between the real power and apparent power.
A) lag
B) power factor
C) voltage-current
D) watt
Power factor
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
10 ohm resistor
60 cycle frequency travels 180 degrees in how many seconds?
A) 1/60
B) 1/120
C) 1/180
D) 1/30
1/120
The current carrying capacity of conductors expressed in amperes is _____.
A) demand
B) pressure
C) ampacity
D) duty-cycle
Ampacity DEF 100
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
Reaming the ends of rigid conduit after it is cut
Electricity is sold by the kilowatt which is _____ watts.
A) 10,000
B) 1000
C) 100
D) 100,000
1000
Three way switching does not use the folloing conductor:
A) ungrounded
B) traveler
C) grounded
D) switch leg
Grounded 402.2(A)
The greater the number of free elwcteons, the better the _____ of a metal.
A) insulation value
B) resistance
C) voltage drop
D) conductivity
Conductivity
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
Hacksaw and a file
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
Relay
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
Accurately only when clamped perpindicular to a conductor
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
Shorted
The electric pressure or electromotive force is measured by the _____.
A) volt
B) eletric meter
C) watt
D) kilowatt
Volt
Conduit installed in a concrete slab is considered a _____.
A) damp location
B) moist location
C) wet location
D) dry location
Wet location
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
May transmit shock to the user
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
Impedance
Know what a rotometer is
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
All of these
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
Voltmete, ohmmeter and ammeter
A good magnetic material is _____.
A) brass
B) copper
C) iron
D) aluminum
Iron
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
AC or DC
A fuse puller is used in replacing _____.
A) cartridge fuses
B) plug fuses
C) link fuses
D) ribbon fuses
Cartridge fuses
A pendant fizture is a ______.
A) hanging fixture
B) recessed fixture
C) bracket fixture
D) none of these
Hanging fixture
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
An approved box nanger
The unit of measure for electrical resistance to current is the _____.
A) watt
B) ohm
C) volt
D) amp
Ohm
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
Supplied by transformers and batteries
To convert AC to DC you will use a _____.
A) generator
B) rectifier
C) vibrator
D) auto transformer
Rectifier
S, is a symbol used on a drawing to indicate a _____ switch.
A) flush
B) single pole
C) four-way
D) three-way
Single pole
Action requiring personal intervention for its control:
A) controller
B) automatic
C) periodic duty
D) non automatic
Non automatic
A voltmeter is connected in _____ with the load.
A) series
B) parallel
C) series-parallel
D) series-shunt
Parallel
