IMSA Traffic Control Tech 1
High-Traffic Areas - correct answer ✔High-volume streets, such as arterials.
Typically wide and have multiple lanes of travel.
Low-Traffic Areas - correct answer ✔Low-volume streets such as local
streets or collector streets. Typically narrow and have single lanes of travel.
Insulated Hand Tools - correct answer ✔Tools with insulated handles,
designed to protect from electric shock when working with live electricity.
Insulated Mats/Blankets - correct answer ✔Safe place to stand when
working on electric systrems
Circuit Breaker Finders - correct answer ✔Tool that helps locate the
appropriate circuit breaker or fuse that controls the electrical supply to the
area.
Conductors - correct answer ✔Materials that conduct electricity
Ex. Most metals
Insulators - correct answer ✔Materials that do not conduct electricity
EX. plastic, rubber, glass, ceramic
Understanding electricity - correct answer ✔Electricity is similar as water
flowing through pipes
Voltage is like water pressure.
Current is like amount of water.
, Resistance is like the size of the pipe.
Ohm's Law - correct answer ✔E = I x R
E = Voltage(Electromotive Force) (Volts)
I = Current(Intensity) (Amps)
R = Resistance (Ohms)
120 VAC/ 24 VDC - correct answer ✔Typical voltages used in traffic signal
circuits
Alternating Current - correct answer ✔The electrons flow in a switching
direction going forward and backwards. In a power grid usually 120 Volts at 60
cycles per second(Hertz)
EX.Powers homes, businesses, factories
Direct Current - correct answer ✔electrons flow in one direction
5, 12, 24 Volts usually
EX. Batteries, power supplies
Bonding and grounding - correct answer ✔Joining metallic parts and using
them to provide an electrically conductive path to the ground
Phases - correct answer ✔Through phases are typically even numbered and
left turn phases are odd numbered. Phases 1- 2- 5- 6 are the main street,
while 3 -4 - 7 -8 are the side street
High-Traffic Areas - correct answer ✔High-volume streets, such as arterials.
Typically wide and have multiple lanes of travel.
Low-Traffic Areas - correct answer ✔Low-volume streets such as local
streets or collector streets. Typically narrow and have single lanes of travel.
Insulated Hand Tools - correct answer ✔Tools with insulated handles,
designed to protect from electric shock when working with live electricity.
Insulated Mats/Blankets - correct answer ✔Safe place to stand when
working on electric systrems
Circuit Breaker Finders - correct answer ✔Tool that helps locate the
appropriate circuit breaker or fuse that controls the electrical supply to the
area.
Conductors - correct answer ✔Materials that conduct electricity
Ex. Most metals
Insulators - correct answer ✔Materials that do not conduct electricity
EX. plastic, rubber, glass, ceramic
Understanding electricity - correct answer ✔Electricity is similar as water
flowing through pipes
Voltage is like water pressure.
Current is like amount of water.
, Resistance is like the size of the pipe.
Ohm's Law - correct answer ✔E = I x R
E = Voltage(Electromotive Force) (Volts)
I = Current(Intensity) (Amps)
R = Resistance (Ohms)
120 VAC/ 24 VDC - correct answer ✔Typical voltages used in traffic signal
circuits
Alternating Current - correct answer ✔The electrons flow in a switching
direction going forward and backwards. In a power grid usually 120 Volts at 60
cycles per second(Hertz)
EX.Powers homes, businesses, factories
Direct Current - correct answer ✔electrons flow in one direction
5, 12, 24 Volts usually
EX. Batteries, power supplies
Bonding and grounding - correct answer ✔Joining metallic parts and using
them to provide an electrically conductive path to the ground
Phases - correct answer ✔Through phases are typically even numbered and
left turn phases are odd numbered. Phases 1- 2- 5- 6 are the main street,
while 3 -4 - 7 -8 are the side street
