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1. Describe the difference between a flooded and a dry (direct expansion) type cooler.
2. What are some advantages and disadvantages of flooded coolers?
3. Why are low-pressure refrigerants well suited for centrifugal compressor chillers?
you borrowed $10000 from a local bank with the agreement that you will pay back the loan in five years the pay back plan includes two parts: a graduated payment plan with the first payment set at 1500 at year 1 and a gradient of $600 afterward
a control system is needed to control a small shopping center parking lot lighting system and the exterior lighting
Determine the force exerted on q2 by q1 if q1 = 3 x 10-4 C and q2 = -10-4 C and are located at point A(1, 2, 3) and point B(2, 0, 5). respectively.
A single phase AC circuit is conected to a 120V, 60Hz. The circuit impedance is Z=8+j6Ω at 60Hz. Calculate the rms phase current, real & reactive power and power factor.
A permanent increase in government purchases has a larger effect than a temporary increase of the same amount." Use the saving-investment diagram to evaluate this statement, focusing on effects on consumption, investment, and the real interest rate f..
A machine operates at 0·8 p.f. lagging and has a monthly demand of 750 kVA.- Calculate the annual saving effected by the use of capacitors.
Find i(t), vL(t), v(t), the energy stored in the capacitance, the energy stored in the inductance, and the total stored energy for the circuit of Figure, given that vC(t) = 10 cos(1000t)V. (The argument of the cosine function is in radians.) Show ..
A type of transformer known as an autotransformer is shown in Figure. Assuming that all of the flux links all of the turns, determine the relationship between v1, v2, and the number of turns.
Design an interface for a 12 V, 500 mA bipolar stepper motor. There are 200 steps per revolution. Write software to spin the motor at 1 rps.
What is the full (expanded) address of the abbreviated IPv6 address FDEC::CF:0:FFFF?
The first load takes 600 kVA at 0.7 p.f. lagging. The second takes 150 kW at unity power factor. The line to line voltage at the load end of the line is 3810.5 V.
A steel rod subjected to compression is modeled by two bar elements, as shown in Figure P2.10. Determine the nodal displacements and the axial stress in each element. What other concerns should be examined?
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