module 4 test
Why must the tower be contacted before work can be accomplished? (STS 12.1)
All answers are correct
Why aren't flashing white lights allowed in clear zones or on objects in the immediate vicinity of runways? (STS 12.1)
Approaching pilots may mistake them for other flashing white lights
What are three main issues that negatively affect the quality of light? (STS 13.1)
Brightness, glare, and CRLGlare, uniformity of illuminance, and CRI
What is the purpose of a traffic control system? (STS 16.5.1)
Ensures traffic safety and the orderly movement of traffic for motorists
Which of the following is true about a yellow filter installed at the runway edge lights? (STS 12.1)
For the last 2,000 feet, the lights have yellow filters installed to indicate a caution zone to the pilot
Which of the following is true about a counter poise? (STS 12.1)
It provides both ground return and lightning protection for airfield circuit
What is the theory of operation of a constant current regulator? (STS 12.1)
Regulates the voltage in order to keep the current constant
Which of the following fixture classifications would best be used in a location that requires 60 to 90% light output to be directed downward with the remaining light directed upward? (STS 13.1)
Semi-direct
When power is out to the control cabinet for more than two hours, the ____________? (STS 16.5.1)
Signals should flash for another two hours afterwards
Why is it important to not touch the lamp with your hands? (STS 12.1)
So oil doesn't cause hotspots thus reduces the life of the bulb
Why are constant-current regulators loaded to not less than 50 percent and not more than 100 percent of their maximum kilowatt output? (STS 12.1)
So they can make emergency connections
Why is it important to match the bulb with the preexisting one during re-lamping operations? (STS 12.1)
The IL is rated as such that the bulb may be damaged or dimly lit if not matched
What is the purpose of the automatic lamp changer? (STS 12.1)
To change the lamp once preventing loss of beacon operation
What is the purpose of an obstruction light? (STS 12.1)
To define the vertical and horizontal limits of natural or manmade objects which are hazards to air navigation
What is the purpose of an airfield beacon that is green with double flash white? (STS 12.1)
To let pilots know there is a military airfield near by
What is the purpose of a semi-flush light fixture? (STS 12.1)
To provide lighting in areas where normal fixtures would not be enough to lite the areaTo provide lighting in areas that could damage normal fixtures
What is the purpose of the Airfield Lighting System? (STS 12.1)
To provide pilots with a visual approach path
Why is it a common practice to replace all traffic signal lamps at the same time? (STS 16.5.1)
To reduce the number of repeat calls and maintenance costs
What is the purpose of control cable? (STS 12.1)
To transfer control back and forth from tower to vault
When installing a lighting system in an office building, which fixture type would be best suited for mounting in a suspended ceiling? (STS 13.1)
Troffer
When there is a conflict between FAA and USAF airfield regulations, the technician should? (STS 12.1)
Use the USAF regulations
What is the purpose of radios? (STS 12.1)
Used to coordinate work activities on and with airfield light circuits
When a fault in the traffic light electrical system is detected, the flash transfer relay switches to ____________. (STS 16.5.1)
all read lights flashing
What is the purpose of the Fiber Gear? (STS 12.1)
to prevent the motor from burning up
