Technician A says that vehicles with electronic returnless fuel systems use pulse width modulation to power the fuel pump and maintain fuel pressure. Technician B says that the electronic returnless fuel system uses a power transistor to control the fuel pump. Which technician is correct?
A) Technician A only B) Technician B only
C) Both technicians A and B D) Neither technician A nor B
C
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Una diferencia de temperatura entre dos cuerpos hace que la energía térmica se transfiera del cuerpo con temperatura _____ al cuerpo con temperatura_____ .
a. del aire; ambiente b. externa; interna c. mayor; menor d. interna; externa
Write a computer program based on Eq. 9.15, and obtain the plot in Fig. 16.1. Now consider that a thin sheet specimen of an alloy of iron, containing 0.018 percent carbon, is heated to 800 K and held there long enough to come to equilibrium before being quenched in iced brine.
(a) Estimate from your figure the amount of carbon in solid solution just after the quench. (b) If the specimen is maintained in the iced brine for a very long time, would you expect the amount of carbon in solid solution to remain the same as that existing just after the quench?
In order to gain EA Credit 6, a minimum of ________ percent of the ________ supplied to the building must come from renewable energy sources
A) 100, nutrients B) 35, electricity C) 50, water D) 45, paper products
Which of the following is an advantage of using the CDMA standard?
A) increased number of subscribers per cell B) reduced chance that the call will be lost during handoff C) reduced power consumption of the telephones due to the way the bits are transmitted and received D) all of the above E) increased security provided by spreading the information across the spectrum