According to the text, what gas can disable the catalyst if it contaminates the PEM fuel cell?
A) N2O B) CO C) CO2 D) NOx
B
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A watershed with 40% impervious cover would probably have what kind of stream quality?
What will be an ideal response?
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If the primary current is less than two amperes for a transformer rated at 600 volts or less, the short-circuit protective device can be set at not more than ____ percent of this value.
A. 100 B. 200 C. 300 D. 400
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What unit of electricity is used as a signal for a computer?
A) Watt B) Ampere C) Ohm D) Volt
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The output of a gate has an internal short. A current tracer will ________
A) identify the defective gate B) show whether the gate is shorted to Vcc or ground C) be able to identify the defective load node D) probably not be able to locate the problem
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