The accompanying picture shows a standard double-loop armature and its corresponding torque graph for one complete revolution. Would the graph look the same if one of the two loops was rotated 90º so that the two loops were parallel to one another? If so, why? If not, draw or describe the new graph.
If you were to rotate one of the two conductors 90º, the torque graph would change. One of the two traces on the graph would shift so that the two traces overlapped. This would defeat the purpose of placing two conducting loops in the armature. The second loop was added in order to even out the pulsations in the torque.
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Gas at constant T and P is contained in a supply line connected through a valve to a closed tank containing the same gas at a lower pressure. The valve is opened to allow flow of gas into the tank, and then is shut again.
(a) Develop a general equation relating 
and 
the moles (or mass) of gas in the tank at the beginning and end of the process, to the properties 
and 
the internal energy of the gas in the tank at the beginning and end of the process, and H?, the enthalpy of the gas in the supply line, and to Q, the heat transferred to the material in the tank during the process.
(b) Reduce the general equation to its simplest form for the special case of an ideal gas with constant heat capacities.
(c) Further reduce the equation of (b) for the case of 
= 0.
(d) Further reduce the equation of (c) for the case in which, in addition, Q = 0.
(e) Treating nitrogen as an ideal gas for which 
apply the appropriate equation to the case in which a steady supply of nitrogen at 25°C and 3 bar flows into an evacuated tank of 4 
volume, and calculate the moles of nitrogen that flow into the tank to equalize the pressures for two cases:
1. Assume that no heat flows from the gas to the tank or through the tank walls.
2. Assume that the tank weighs 400 kg, is perfectly insulated, has an initial temperature of 25°C, has a specific heat of 
and is heated by the gas so as always to be at the temperature of the gas in the tank.
Power steering systems usually have two hoses: one for pressure and the other for return. Discuss the differences between the two.
What will be an ideal response?
The typical PAL has
A) only latch inputs. B) variable voltage inputs. C) 8 or more inputs. D) 8 or fewer inputs.
An information block provides ____.
A. an identification number B. revision dates C. parts list D. all of the above