According to the U.S. Green Building Council (USGBC), buildings in the United States are responsible for ________ percent of CO2 emissions, 40 percent of the total energy consumption, and 13 percent of all water consumption
A) 39 B) 40 C) 38 D) 30
A
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Technician A says that carbon dioxide is classified as a greenhouse gas (GHG). Technician B says that water vapor produced by combusting HC fuel is not classified as a GHG because it is harmless. Who is right?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
Flowering trees are called hardy perennials
Indicate whether the statement is true or false
Using nodal analysis, find v? in the circuit in Fig. 3.57.
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Which of the following statements on the application of the SQO sequencer instruction is NOT true?
A) The SQO rung is false during the first scan for all timer-driven applications. B) A pulse stream with a constant duty cycle or one with a variable duty cycle is used when the SQO trigger is a series of timer pulses. C) When external events are used to trigger the SQO instruction, an internal trigger in the sequencer linked to external events determines if the sequencer moves a word to the destination file. D) The SQO instruction can be stepped to the next sequencer word by two types of triggers: series of timed pulses or a sequence of external events.