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.
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.