A hydrogen fuel cell is ____ source of DC current.

a. a very complex
b. the least recommended
c. a very efficient
d. a somewhat antiquated


c. a very efficient

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A MAP sensor is being discussed. Technician A says that many MAP sensors act as a barometric pressure sensor when the ignition switch is turned off. Technician B says that on many MAP sensors the signal voltage should increase when the vacuum at the sensor decreases. Who is right?

A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B

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Increasing the airflow across a coil:

A) Increases the static pressure drop across the coil. B) Increases the temperature drop across the coil. C) Decreases the static pressure drop across the coil. D) Increases the latent cooling capacity of the coil.

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Plant quarantine is enforceable only at international ports of entry

Indicate whether the statement is true or false

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Draw the output waveshape of an unrectified LVDT in the following figure when the core is perfectly centered, the core is above center, and the core is below center.

What will be an ideal response?

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