A sound level meter is placed in front of a loudspeaker of a 60W audio system reads 70dB. All else being equal, when placed in front of a 120W system, the meter will read ________?
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A sound level meter is placed in front of a loudspeaker of a 60W audio system reads 70dB. All else being equal, when placed in front of a 120W system, the meter will read ________?
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- A residential air-conditioning unit is installed in the attic. a. Is a lighting outlet required? __________ b. What Code section applies? __________ c. If a lighting outlet is required, how shall it be controlled? __________ d. What Code section applies? __________ e. Is a receptacle outlet required? __________ f. What Code section applies? __________The ________parameters may not reflect the actual operating conditions but simply provide an indication of the level of each parameter to expect for general use. a.hybrid-pi b.hybrid c.pi d.re1.1 PV modules can be wired together in an array using ______ connections to increase voltage. a. Terminating b. Series c. Parallel d. AC 1.2 A PV module, also called a solar panel, is comprised of individual photovoltaic _______ wired and mounted together as an integrated unit. a. Capsules b. Compartments c. Chips d. Cells 1.3 A __________ system uses a storage system that stores the generated electricity so it can provide during times when the system’s panels are not receiving solar energy. a. Direct coupled b. Self regulating c. Charge controlled d. Indirectly connected 1. 4 __________ energy may have the potential to supply all of the world's energy needs, but at this time, it provides a very small percentage. a. Coal b. Natural Gas c. Diesel d. Solar
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- 6. According to the NEC, allowance for the future expansion of installations isA. an exception.B. in everyone's best interest.C. defined.D. a requirement.If an electrical system operates at a potential higher than 600 volts, the nonmetallic conduit must be encased in at least_of concrete. A. 1 inch B. 2 inches C. 4 inches D. 6 inchesAn isolator is used to: Select one: a. To be mounted on towers for insulation purpose b. All of the above c. to disconnect part of the system for maintenance from live circuit d. Insulate the wires to avoid electrocution and short circuits Clear my choice