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Devices practice questions

34 questions from the flagger and work zone traffic control practice test.

Devices practice test

10 questions, graded as you go, with the reason for every answer. No sign-up.

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Sample questions

Which background color may be used on warning signs set up for a traffic incident such as a crash scene?

  1. Fluorescent blue
  2. Fluorescent pink
  3. Fluorescent green
  4. Fluorescent purple
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B. Fluorescent pink

Signs in a traffic incident management area may use a fluorescent pink background with black legend, which sets them apart from planned road work. The other colors have no such use on warning signs.

Reference: MUTCD Part 6, traffic incident management areas (2009 Edition Section 6I.01)

What is the minimum mounting height for a sign on a portable support, measured from the bottom of the sign to the traveled way?

  1. 3 feet
  2. 5 feet
  3. 7 feet
  4. 1 foot
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D. 1 foot

Signs on portable supports must be at least 1 foot above the traveled way. 7 feet is the height used for post-mounted signs where pedestrians or parked vehicles are present.

Reference: MUTCD Part 6, sign placement (2009 Edition Section 6F.03)

A portable sign stand keeps blowing over. What is the proper way to ballast it?

  1. Place sandbags low on the legs or base
  2. Hang a concrete block from the top
  3. Chain it to a steel wheel rim
  4. Stack rocks and asphalt on the base
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A. Place sandbags low on the legs or base

Ballast should be something like sandbags kept at ground level, so the stand stays crashworthy. Hard, heavy objects such as concrete, rims or rocks can become projectiles or snag a vehicle when the sign is hit.

Reference: MUTCD Part 6, general characteristics of devices and crashworthiness (2009 Edition Sections 6F.01 and 6F.03)

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