Alaska Contractors License Exams

Alaska Unlimited Sheet Metal Contractor

Sample Questions for the Alaska Unlimited Sheet Metal Contractors Exam

  1. In a heating and/or cooling system, what is the accessory used to supply and control the introduction of outside air and to exhaust stale air?
    1. The humidistat
    2. The HEPA filter
    3. The energy recovery ventilator (ERV)
    4. The indoor air quality equalizer
  2. Which of the following precautions should be taken when welding near combustible materials?
    1. Have some sort of extinguishing device readily available
    2. Stay clear of sparks
    3. Try to direct the sparks away from the combustible material
    4. Use a heat shield
  3. What is a sling psychrometer used for?
    1. Measuring dew point
    2. Determining relative humidity through the relation of wet bulb temperature to dry bulb temperature
    3. Checking the performance of air conditioning equipment
    4. To balance a heating/cooling split system
  4. What is the composition of air?
    1. 21% oxygen, 78% nitrogen, and 1% carbon dioxide, argon, and trace amounts of other rare gases, vapor, and particulates
    2. 50% oxygen, 30% nitrogen, and 10% carbon monoxide, and 10% other rare gases & particulates
    3. 30% oxygen, 20% nitrogen, and the remaining 50% is composed of carbon dioxide and other gases, vapors, and particulates
    4. 21% oxygen, 78% nitrogen, and 1% carbon dioxide
  5. When installing insulation in the interior of a duct, which of the following characteristics of insulation would be MOST effective in reducing sound transmission?
    1. density
    2. porosity
    3. elasticity
    4. ductility
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