The type of fuel cell that will undoubtedly be used first in an automobile is the:
A. Proton exchange membrane fuel cell
B. Solid oxide fuel cell
C. Molten carbonate fuel cell
D. Alkaline fuel cell
B. Solid oxide fuel cell
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Which of these tasks falls into the category of rough carpentry?
a. Applying exterior siding b. Building and installing cabinets c. Applying exterior trim d. Framing a house
The twisting force used to turn a fastener against the friction between the threads and between the head of the fastener and the surface of the component is called _____.
A. twist B. rotation C. power D. torque
If the operating frequency decreases in Figure 12-1, the current ________
A) decreases to zero B) decreases C) increases D) remains the same
In the accompanying figure, the item identified as number 1 represents the ____.
A. y-axis B. x-axis C. primary quadrant D. secondary quadrant