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1. What are the most common sources of refrigeration system contamination?
2. Explain how contaminants from a previous compressor failure can cause a replacement compressor to fail.
3. What is the purpose of collecting system baseline performance data?
An analog signal consists of three sinusoids with frequencies 3.1 KHz, 4.82 KHz, and 5.64 KHz. The signal is sampled at asampling rate of 32 KHz producing the Discrete signal x(n).
Construct the RC differentiator. Set the channel 1 input coupling switch to dc. Next adjust the dc offset, amplitude, and frequency controls of the function generator to produce the input waveform.
Are these two relationships linear? Is linearity necessary to have an automatic operation? Switch the system back to auto and hold your hand over the tube so as to cause a restriction. What happens when controlling the ball to a set height?
Three screws are drawn at random from a lot of 100 screws, 10 of which are defective. Find the probability that the screws drawn will be nondefective in drawing (a) with replacement, (b) without replacement.
A voltage of 60cos(4πt) V appears across the terminals of a 3 m-F capacitor. Calculate the current through the capacitor and the energy stored in it from t=0 to t=0.125 sec.
a dc series with an unsaturated field and negligible resistance, when running at a cirtain speed on a given load takes 50A at 460V. If the load -torque variase as the cube of the speed. Calculate the resistance required to reduce the speed 25%.
with general block diagrams, show how to obtain the following frequencies from a 10 MHz clock by using single flip-flop, modulus-5 counters, and decade counters for 5MHz 2.5MHZ 2MHz 1MHz 500kHz 250 kHz 62.5 kHz 40 kHz 10 kHz 1 kHz
Select a learning outcome of any subject area from your state for Pre-Kindergarten or Kindergarten. List the content standard and describe an activity that facilitates learning this concept. Then, describe a form of authentic assessment that you will..
Calculate (i) the parallel capacitance C1 that would be required to change the power factor of the total load on the supply to 0.80 lagging and (ii) find the value of the supply current at this power factor
Assume you have a current source connected to a parallel RLC circuit. The current source is i(t)=cos(2t). The Resistor is 2ohms, inductor L=1H, capacitor C=1/2F. compute the average power consumed by this circuit in SSS
A 0.01-µF capacitor has ceramic with a dielectric constant of 7500. If the ceramic is removed, the plate separation doubled, and the spacing between plates filled with oil, what is the new value for C?
Determine and compare the intrinsic impedance, attenuation constant, and skin depth of copper [σcu =5.80 × 10^7 (S/m)], silver[σag=6.15 × 10^7 (S/m)], and brass[σbr=1.59 × 10^7 (S/m)]
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