2-6-11 Traffic Signal Hardware and Equipment

Question 1

The top of a signal lens is labeled to ensure that it is positioned correctly in the signal face.

Answer 1

True

Question 2

The two types of signal visors are cut-a-way and __?__.

Answer 2

tunnel

Question 3

A signal head with three 12-inch sections would be referred to as a __?__.

Answer 3

12-12-12

Question 4

A 150-watt traffic signal lamp is required to illuminate the red lens in an eight-inch signal section.

Answer 4

False

Question 5

Traffic signal lamps are typically rated for __?__ of use.

Answer 5

8,000 hr

Question 6

Backplates are used to increase the __?__ of the signal faces.

Answer 6

visibility

Question 7

The bottom of a pedestrian traffic signal head must be at least seven feet above the sidewalk.

Answer 7

True

Question 8

When used in pedestrian signal heads, an LED module consumes the same amount of power as an incandescent lamp with an equal wattage rating.

Answer 8

False

Question 9

A typical size for a pedestrian signal head section is __?__.

Answer 9

12 × 12

Question 10

The traffic signal industry has not adopted international symbols for pedestrian signals.

Answer 10

False

Question 11

The 12-inch section of a pedestrian signal head requires a __?__ incandescent lamp to illuminate the lens.

Answer 11

116 W

Question 12

The time allowed for the pedestrian to finish crossing the street before conflicting vehicle traffic is allowed to proceed is known as pedestrian __?__.

Answer 12

clearance interval

Question 13

The countdown timer is only displayed during the time that the flashing DON’T WALK appears.

Answer 13

True

Question 14

An audible pedestrian signal sends a distinctive tone during the __?__ interval

Answer 14

WALK

Question 15

Pedestrian push buttons should be installed at __?__ above the finished grade.

Answer 15

42”

Question 16

Audible pole locators use a tone with a slower pulse interval than audible pedestrian signals.

Answer 16

True

Question 17

Mastarms are based on a __?__ design.

Answer 17

cantilever

Question 18

Wind load on a mastarm is rated in pounds per square inch.

Answer 18

False

Question 19

In a mastarm intersection, the traffic signal cable is protected from exposure to the weather.

Answer 19

True

Question 20

When installing a plumbizer, the single set screw should be positioned on the __?__ side of the plumbizer.

Answer 20

bottom

Question 21

When properly installed, the bottom of traffic signal heads will be at least __?__ above the traveled roadway.

Answer 21

15’

Question 22

In a span wire intersection, the __?__ wire carries the signal cable across the span.

Answer 22

messenger

Question 23

A strand vise kit contains a strand vise, a clip, and a __?__.

Answer 23

bail

Question 24

Signal cables are attached to tether wires by the use of cable rings.

Answer 24

False

Question 25

When installing a ceramic insulator in a span, both bails must interlock with each other and pull across the thickest part of the insulator.

Answer 25

True

Question 26

The balance adjuster of a span wire hanger assembly is also called a __?__.

Answer 26

gooseneck

Question 27

On span intersections where tether wires are used, a tether __?__ assembly needs to be installed on the bottom of the signal head.

Answer 27

clamp

Question 28

Pedestrian poles or pedestal poles are used at intersection corners where no structural support is required for mastarms or span wires.

Answer 28

True