358 Engineering Fundamentals
wheel and axle: A simple machine that uses a
circular wheel with an axle in the middle to
create a mechanical advantage. (10)
wind turbine: A type of windmill used to
generate electricity from wind energy. (13)
work: The application of force to move an object
a distance. (10)
working drawing: A type of engineering
drawing that shows the most complete
drawing produced. (5)
X
XNOR gate: A gate that is an exclusive NOR
gate. XNOR gates provide an output of 1 if
the inputs are both 1 or both 0, but not if one
is 0 and one is 1. (12)
XOR gate: A gate that is an exclusive OR gate.
XOR gates only provide an output of 1 if one
input is 1, but not if both are 1. (12)
Y
yaw: The side-to-side movement of the nose and
tail of an aircraft. (13)
Z
zener diode: A diode that can conduct in reverse
bias and is commonly used in voltage
regulation. (8)
Zeroth Law: An observation dealing with
thermodynamic equilibrium. (15)