For a given number of poles, which of the following determines the speed of an AC motor?
a. Voltage
b. Current
c. Frequency
d. Frame size
c. Frequency
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An extensive range of ____ are manufactured, including products such as sun control screens, shutters, louvers, screens for security, and panels that provide insulation and protection against storms.
A. exterior protection devices B. exterior protective covers C. lockers D. identifying devices
Sizing of a generator set for a particular application is _____.
a. detailed in NEC Article 701 b. achieved by referring to tables in local building codes c. typically done using computer software or manufacturer’s literature d. based on calculations using NFPA guidelines
What is the unit of measurement for admittance?
What will be an ideal response?
If an air conditioning system must be pressurized of service work it can be safely done with:
A. Oxygen B. Nitrogen C. Polyalkylene D. Acetylene