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UNIT 78 REVIEW QUESTIONS ANSWER KEY GO BACK TO INDEX
78-1) Describe one method to determine if a ladder is correctly set up.
One method is that for every 4 feet that the ladder is extended, it should be 1
78-2) Besides the manufacturer, where can the rooftop unit installer consult for
proper unit installation?
78-3) If the rooftop unit is installed in a seacoast area, what is one consideration as
to its location?
78-4) If the rooftop unit is subjected to a corrosive environment, and can’t be
installed in an area away from the offending corrosion, what would be a
possible alternative?
78-5) What is one of the main reasons the rooftop units has to be level?
78-6) Proper clearances are required for what purpose concerning the condenser?
78-7) What are the two possible duct configurations for a rooftop unit?
78-8) If using a heat pump rooftop unit, why is proper height off of the roof
important?
78-9) Why must the technician secure the rooftop unit’s panels when servicing the
unit?
78-10) Where can weight for a rooftop unit be found?
78-11) The gasket material used between the rooftop unit and the roof curb is used
for what purpose?
78-12) Why is it important for the roof curb to be square with the roof joists or
rafters?
78-13) Utilities can be run to the rooftop unit in what two ways?
78-14) What code specifies the correct way for electrical connections to be made?
78-15) When installing units requiring three phase power, what is one of the
concerns with the three phase installation?
78-16) What process allows for condensation of moisture on the evaporator coil?
78-17) What must be installed in the drain line to assure proper condensate
removal?
78-18) If PVC pipe is used for the construction of the drain line, what must be done
to prevent deterioration of the pipe and what causes this deterioration?
78-19) If the rooftop unit utilizes gas heat, what two processes have to be
considered in the installation of the unit?
78-20) What is the customer’s number one concern relative to the rooftop unit?
