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WorksheetsRVTI Level 1 Electrical Systems
Total questions: 50
Worksheet time: 25mins
Which statement is true?
Electrons in the outer orbits are attracted less powerfully to the nucleus.
Electrons in the outer orbits are attracted more powerfully to the nucleus.
Protons in the outer orbits are attracted less powerfully to the nucleus.
Protons in the outer orbits are attracted more powerfully to the nucleus.
Which of these is a function of insulators?
confines electron flow
helps electrons flow freely
magnetizes electrons to it
increases electron quantity
What is true about the ends of permanent magnets?
They are more concentrated than the middles.
They are less concentrated than the middles.
They are just as concentrated as the middles.
They have a high concentration, only on one end.
If a length of wire carrying a current is bent to form a loop, the lines of force around the conductor will leave at one side of the loop and enter
on the same side
on the opposite side
on the east side
on the west side
What is the symbol for current flow?
J
k
kw
l
When two points of unequal potential or voltage are connected
current flows
no electromotive force exists
current ceases to flow
electrons move at different times
Joining RV batteries in series allows the technian to
keep the same voltage and add amperage
keep the same amperage and voltage
keep the same amperage and add voltage
add both voltage and amperage
To properly measure current with a VOM, you must connect the VOM
in parallel with the source
across the component
in series with the source
on the positive side
Convert 125 milliamps to amperes.
12.5
1.25
.0125
.125
What is the correct setting on a VOM for measuring DC Amperage?
DV or V-
DCV or V ∼
Ω
mA or DCA
When using a voltmeter to test for voltage in a simple circuit, always connect the meter in with the load
series
parallel
resistance
relation
Convert 400 millivolts to volts
.004
.04
.40
4.0
What is the basic unit of resistance?
ohm
volt
watt
amp
At constant voltage, double the resistance is equal to _____ the current.
1/4
1/2
double
triple
In the final calculations of Ohm's Law, current is always expressed in
amperes
microamperes
volts
microvolts
Referring to the circuit diagram, indicate what current equals.
.5 amps
5 amps
.1 amps
10 amps
When an accident occurs, it must be reported to
a coworker
the team leader
the supervisor
a bystander
Which of these is associated with system grounding?
The power supply cord is connected to power pedastal.
Noncurrent carrying metal parts are connected to the ground.
Non-current carrying conductors are disconnected from ground.
Galvanic isolation is required to prevent electrical shock.
The intentional grounding of all metal non-current carrying parts of the electrical system is called?
circuit grounding
equipment grounding
ground fault circuit protection
neutral isolation
An electrical circuit is any combination of a _____ and _____ connected together to permit electrons to travel around in a continuous stream.
series; parallel circuit
proton; neutron
conductor; electricity source
resistor; transformer
What type of current flow is illustrated in the graphic below?
simple DC circuit
simple AC circuit
AC series
parallel circuit
Components, devices, and equipment in the RV that utilize low-voltage direct current are often referred to as
AC loads
dry cell loads
wet cell loads
DC loads
Receptacles located in which of these places must have GFCI protection?
the bathroom
15 feet of any faucet
on any interior room in the RV
within 5 feet of room entrances
Batteries connected _____ provide a higher current capacity.
in series
in parallel
in reverse polarity
to transformers
What is the total voltage available across the combination of parallel-connected batteries in the picture?
6 volts
12 volts
24 volts
36 volts
Electrons are _____, and protons are _____.
negative; positive
positive; negative
neutral; negative
positive; neutral
What is the function of a conductor?
stops the flow of electrons
permits electrons to move through it
confines the flow of current
creates a barrier inside the insulator
Current is measured in
volts
amps
ohms
watts
Electromotive force is equal to
powerage
wattage
voltage
the potential of the charge
A parallel RV battery bank allows the technician to
increase the voltage and keep current the same
keep current and voltage the same
increase the current and keep voltage the same
increase both voltage and current
An unknown resistor is connected across a battery. The voltage across it is 12 volts and the current flowing is 4 amperes. What is the resistance of the resistor?
3 ohms
4 ohms
5 ohms
6 ohms
In reference to current, what is the minimum threshold for irreparable damage to body tissues?
1 mA
5 mA
from 0 to 1 amps
over a few amps
In DC currents, the direction of current flow
is constant
reverses periodically
is bi-directional
is controlled by the cable
Wire size is expressed in terms of
watts
gauge
length
voltage
Steps for measuring AC current on an analog or digital meter include placing the meter in a safe position, selecting AC current mode, and then immediately switching to the _____ current range.
lowest
medium-low
medium-high
highest
When measuring current on an analog or digital meter, what relationship should the meter capacity have to the expected amperage?
it should never be lower
it should be higher
it should be equal
it should be equal or lower
When testing for an electrical short during the hot skin test, place one voltmeter probe on an earth ground surface and the other on what type of surface?
plastic
bare metal
glass
insulated
If the skin of the unit is not hot, the voltmeter will read
-1.00
-0.75
0
2.00
When conducting an AC voltage test, an acceptable reading will be at or near _____ VAC or equal to the voltage output of the source.
100
120
140
160
When conducting an AC voltage test, place the test probes into _____ slotted openings of a receptacle.
1
2
3
4
A GFCI has receptacles that are protected at this place if the receptacle is properly wired.
downstream
upstream
to the left of
to the right of
Inverters are rated in
watts
kilowatts
kilowatt-hours
milliwatts
Identify an advantage of alternators.
increased battery life
their output is perfectly clean DC
converts alternative sources of electricity
delivers higher current to lower rpm than generators
RV batteries contain _____ acid.
sodium
lead
caustic
sulfuric
What is true of smoke alarms for RVs?
they need to be listed for RV use and installed
if installed, they need to be listed for RV use
they do not need to be installed per listing requirements
the rules vary from state to state
Identify the necessary electrical safety tests.
120 VAC, Hot Skin, AC Voltage, and GFCI
120 VAC, Cold Skin, AC Voltage, and AFCI
140 VAC, Hot Skin, DC Voltage, and GFCI
140 VAC, Cold Skin, DC Voltage, and AFCI
When pressing the button on a tester during a GFCI test, what must happen?
The circuit breaker must trip.
Low-resistance shorts must occur.
Dead shorts must happen.
Shorts of high resistance must occur.
What is a safety precaution to take when working with batteries?
Wear splash-proof goggles
Use metallic containers when filling a battery
Store acid in warmer locations
No additional protective clothing is necessary
Why do RVs use converters?
replace generators
convert AC to DC
convert DC to AC
increase battery life
What is true of carbon monoxide alarms for RVs?
they do not need to be installed if 120 VAC is used
all CO alarms do not need to be part of PDI
they must be installed regardless of fuel type
they are not required and only operational for RV use
