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WorksheetsElectrical Principles and Wiring Materials - Jr Ag Mech Practice
Total questions: 43
Worksheet time: 22mins
Name
Class
Date
1.
It is important to maintain electrical circuits and equipment properly to ensure their
a)
sturdiness and operation
b)
ability and clarity
c)
long life and safe operation
d)
functioning and short-term work
2.
The form of energy that can produce light, heat, magnetism, and chemical change is
a)
lightning
b)
Electricity
c)
solar
d)
current
3.
A __________________ glows as a result of electricity flowing through gas.
a)
fluorescent light
b)
incandescent light
c)
globe light
d)
arc light
4.
A material that provides great resistance to the flow of electricity is called
a)
retardant
b)
keyless light
c)
conductor
d)
insulator
5.
____________ is the tendency of a material to prevent electrical flow is.
a)
resistance
b)
conductor
c)
insulator
d)
prevention
6.
If electricity flows easily, the metal is said to be a good
a)
insulator
b)
conductor
c)
conduit
d)
insulation
7.
___________ are a measure of the rate of flow of electricity in a conductor.
a)
watts
b)
current
c)
volts
d)
amperes
8.
_______ are a measure of electrical pressure.
a)
volts
b)
amperes
c)
Ohms
d)
watts
9.
________ are a measure of the amount of energy or work that can be done by amperes and volts.
a)
Ohms
b)
watts
c)
circuits
d)
calories
10.
If equation for determining Amperes is Amperes = Watts / Volts. Therefore is a 100-watt light bulb operates at 120 volts, it will draw _________ amperes of electricity.
a)
2.2
b)
1.2
c)
0.83
d)
0.45
11.
The equation for calculating watts is Watts = Volts X Amperes. Therefore, if a 4-ampere motor motor running on 120 volts will consume _______ watts of electricity.
a)
30
b)
4810
c)
400
d)
480
12.
The unit used to measure a materials resistance to the flow of electrical current is known as the _____________.
a)
ohm
b)
watt
c)
volt
d)
amperes
13.
Ohms Law states that electromotive force is equal to amperes times resistance or
a)
R = EI
b)
W = VA
c)
E = IR
d)
V = W/A
14.
What do the following letters stand for when referring to Ohm's Law:
E
I
R
E
I
R
a)
E = Watts, I = Amperes, R = Resistance
b)
E = Volts, I = Amperes, R = Resistance
c)
E = Volts, I = Current, R = Resistance
d)
E = Volts, I = Amperes, R = Insulator
15.
A VOM Meter is a popular combination meter used in electronics. What does VOM stand for?
a)
very over done multi-tool
b)
volt-ornate-meter
c)
volt-ohm-millionaire
d)
volt-ohm-millampere
16.
A milliampere is a ___________ of an ampere.
a)
thousandth
b)
hundredth
c)
tenth
d)
millionth
17.
_____________ is a force that attracts or repels iron or steel.
a)
electricity
b)
magnetism
c)
force
d)
amperes
18.
Magnets have two ends called
a)
conductors
b)
poles
c)
terminals
d)
points
19.
A sources of electricity plus two or more wires connected to a load such as a light, heater, or motor are known collectively as a
a)
wire
b)
current
c)
breaker
d)
circuit
20.
If a circuit is broken so that the current cannot flow through it, it is said to be an
a)
open circuit
b)
closed circuit
c)
broken circuit
d)
current circuit
21.
For wiring safety, an extra wire is provided that connects a piece of equipment to the earth. This is called
a)
forcing
b)
elimination wire
c)
grounding
d)
currenting
22.
A ground __________ is connected to the service entrance panel where electricity enters a building.
a)
conductor
b)
wire
c)
bar
d)
rod
23.
What does GFCI stand for?
a)
Grounding Force Current Identification
b)
Guard Force Calculation Indicator
c)
Ground Fault Circuit Interrupter
d)
Ground Fault Current Interrupter
24.
Which of the following is NOT an electrical safety precaution:
a)
keep appliances dry to reduce shock
b)
keep electrical motors lubricated and free of dirt
c)
do not place extension cords under carpeting
d)
never ground a metal electrical device box
25.
An ______________ is a waterproof device used to attach exterior wires to interior wires of a building.
a)
entrance head
b)
service interrupter
c)
entrance panel
d)
interior head
26.
A _________________ converts high voltage from the power lines to 240 volts for home and farm installations.
a)
reducer
b)
transformer
c)
motor head
d)
pressurizer
27.
A ________________ is a box with fuses or circuit breakers where electricity enters a building.
a)
source entrance position
b)
source entrance portal
c)
service entrance panel
d)
service exterior panel
28.
The diagram points to a 'service drop'. Which of the following best describes the service drop:
a)
The incidental breakage of electrical current from an outlet source
b)
Wires designed to carry electrical current underground from a transformer
c)
The main wire bundle inside a home or office complex
d)
An assembly of electrical wires used to transmit electricity from the transformer to the entrance head
29.
A ___________ is the use of 1 watt for 1 hour.
a)
watt-hour
b)
kilowatt
c)
watt
d)
wasted time
30.
1,000 watts used for 1 hour is called
a)
watt-hour
b)
kilowatt-hour
c)
megawatt-hour
d)
gigawatt-hour
31.
Circuits beginning from the service entrance panel are called
a)
branch currents
b)
beginning circuits
c)
branch circuits
d)
big electrical circuits
32.
A _________ is a plug or cartridge containing a strip of metal that melts when more than a specified amount of current passes through it.
a)
fuse
b)
breaker
c)
circuit
d)
panel
33.
A ____________ is a switch that trips and breaks the circuit when more than a specified amount of current passes through it.
a)
breaker line
b)
entrance panel
c)
fuse
d)
circuit breaker
34.
Copper or aluminum wires covered with paper and vinyl for insulation and protection are called
a)
nonmetallic sheathed cable
b)
nonmetallic serviced cable
c)
metallic sheathed cable
d)
sheathed safety cable
35.
Armored cable consists of a _____________ with individual wires inside.
a)
rigid metal sheath
b)
flexible metal sheath
c)
rigid nonmetallic sheath
d)
flexible metal coating
36.
Tubing that contains individual insulated wires is called
a)
sheathed cable
b)
insulator
c)
conductor
d)
conduit
37.
What does AWG stand for when referring to wire size?
a)
Authorized Wire Gauge
b)
American Wire Gauge
c)
American Wire Guild
d)
Automatic Wire Gauge
38.
What does the standard electrical symbol 'S' stand for?
a)
Battery
b)
Bell
c)
Ceiling Outlet
d)
Switch
39.
What standard electrical symbol is pictured?
a)
fan outlet
b)
single receptacle outlet
c)
duplex receptacle outlet
d)
convenience outlet
40.
What standard electrical symbol is pictured?
a)
ceiling outlet
b)
duplex receptacle outlet
c)
single receptacle outlet
d)
dimmer switch
41.
This term refers to when there is a loss of voltage as it travels along a wire.
a)
voltage loss
b)
voltage drop
c)
volt metered loss
d)
voltage stop
42.
What type of wire is used for dry locations with high temperature?
a)
THHN
b)
T
c)
TW
d)
UF
43.
If a nonmetallic sheathed cable is stamped with the marking '12-2', it will contain...
a)
three strands of No. 12 wire, one black, and one red.
b)
Two strands of red wire and one white
c)
two strands of No. 12 wire, one black and one white
d)
1 strand of white wire and 1 strand of black wire made of aluminum.
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