Which of the following best describes the action of pulse-triggered flip-flops?
A) The data is entered on the leading edge of the clock, and transferred out on the trailing edge of the clock.
B) A pulse on the clock transfers data from input to output.
C) The synchronous inputs must be pulsed.
D) The clock and R-S inputs must be pulse shaped.
A
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____ methods such as finite element analysis (FEA), modal analysis, and thermal analysis have enabled engineers to design systems in a fraction of the time that traditional design methods require.
A. Graphical B. Differential C. Numerical D. Programmatic
Most grasses need a pH range of _____
A) 5.0-6.0 B) 5.0-5.5 C) 6.0-7.0 D) 6.0-6.5
Answer the following statement(s) true (T) or false (F)
1. The two most important control issues in fuel cells are water and heat.
2. In general, input air should be in excess of 20% humidity for SPFC (PEM) cells to operate efficiently.
3. While there are many hydrocarbon fuels that can serve as feed gases for reformation, the simplest is oxygen.
4. In the steam reformation reactions, steam is recycled through the system at high temperatures to the reformation anode and the following reaction occurs: 
5. In general, SPFC (PEM) cells might convert only half the available energy to electricity with the other half converted to heat.
Residential air filters that remove particulates from the air include fiberglass, pleated paper, and ____ precipitators.
A. electric B. hydrolic C. electrostatic D. hydrostatic