IMSA Traffic Control Tech 1 UPDATED
ACTUAL Exam Questions and CORRECT
Answers
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=IxR
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
Concurrent group - CORRECT ANSWER - phases that are grouped on the same street.
phases usually turn on with the the others in their group. divided by barrier, e.g main street/ side
street
ACTUAL Exam Questions and CORRECT
Answers
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=IxR
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
Concurrent group - CORRECT ANSWER - phases that are grouped on the same street.
phases usually turn on with the the others in their group. divided by barrier, e.g main street/ side
street
