How can an installer accurately determine the weight for a particular rooftop unit?
A) An accurate estimate can be obtained by multiplying the unit volume times 2 lb.
B) Balance the unit on top of an electronic charging scale.
C) Calculate the unit volume and divide that volume by the density of copper.
D) Look in the manufacturer's installation instructions.
D
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The NEC® article that lists the requirements for installing a service disconnect is _____.
a. NEC Article 110 b. NEC Article 210 c. NEC Article 220 d. NEC Article 230
Replacement boars and gilts should be bought _____ days before they are to be used
a. 5 to 20 c. 20 to 25 b. 10 to 20 d. 30 to 60
Items such as aluminum, glass, and plastic are being recycled into new products
Indicate whether the statement is true or false
Technician A says that proper starter operation depends on the battery being at a 95% charge and battery cables being of the correct size (gauge) and having no more than 0.8-volt drop. Technician B says that voltage-drop testing includes cranking the engine, measuring the drop in voltage from the battery to the starter, and measuring the drop in voltage from the negative terminal of the battery
to the engine block. Who is right? A) Technician A only B) Technician B only C) Both technicians D) Neither technician