When performing an EGR system test on a vacuum operated EGR valve, how much should intake manifold vacuum decrease when the EGR valve is opened at fast idle?
A) 6-8 PSI B) 6-8 in. Hg. C) 14.7 PSI D) 1-2 in. Hg.
B
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The most effective method of power factor correction is the installation of _____.
a. branch circuits b. capacitors c. controllers d. grounding conductors
A piece of 1 ? 4 or 1 ? 6 stock called a ____ is installed around the walls of a closet to support the shelf and the rod.
a.frame b.back band c.brace d.cleat
Which switching device uses LEDs?
A) Magnetic reluctor B) Optical sensor C) Hall effect D) Pickup coil
A temperature sensor in a production line under normal operating conditions produces a no-load (i.e., sensor current = 0) voltage:
vs = Vpk cos(?t) Rs = 400?
Vpk = 500mV ? = 6.28 krad/s
The temperature is monitored on a display (the load) with a vertical line of light-emitting diodes. Normal conditions are indicated when a string of the bottommost diodes 2 cm in length is on. This requires that a voltage be supplied to the display input terminals where
Ro = 12 k? vo = Vm cos(?t) Vm = 6V
The signal from the sensor must be amplified. Therefore, a voltage amplifier, shown in Figure P8.2, is connected between the sensor and CRT with
Ri = 2k? Ro = 3k?
Determine the required no-load gain of the amplifier.
