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1. What are the indications a check valve has stuck closed on an outside coil?
2. Name the four most predominant defrost systems.
3. A temperature-differential defrost system will not go into defrost. This is the most common complaint on this control. Describe the correct solution to this problem.
Give a different equation, in terms of the input and output, to describe the system. Is the system stable?
Given the following system of linear equations: x1 + 2x2 + x3 = 4, 12x1 + 16x3 = 28, 8x1 - x2 + 5x3 = 12(a) Write it in the form of Ax = b (b) Find all solutions to the system using Gauss elimination method
A Schottky diode is formed between a metal of work function eφm=4.7eV, and a semiconductor of electron affinity eφB=4.0eV. The semiconductor is n-type with Nd=1016 cm-3, Nc=1019 cm-3 and εR =12.
When a bridge rectifier and a capacitor-input filter drive a voltage regulator, the capacitor voltage during discharge is almost a perfect ramp. Why do we get a ramp instead of the usual exponential wave?
Express the voltage pulse, v(t), in Figure mathematically using unit step functions - Find the Laplace transform, V(s), of the voltage pulse in Figure 1
Calculate the magnitude and phase angle of the current through the coil, and the magnitude and phase angle of the voltage across the coil. Also, calculate S, P and Q for the circuit
A 220 V shunt motor has armature and field resistance of 0.2-ohm and 220-ohm respectively. The motor is driving a constant load torque and running at 1000 rpm drawing 10 A current from the supply.
Two capacitors, one 6.6 µF the other 29 µF, are connected in parallel across a 12 V battery.
The output becomes 1 and remains 1 thereafter when at leasttwo 0s and at least two 1s have occured as inputs, regardless ofthe order of occurrence. Assuming this is to be implemented as aMoore machine, draw a state diagram for the machine.
The fault level at the grid connection point is 1000 MVA. What will now be the required rating of circuit breakers connected to the busbars?
At t=40s, the capacitor is disconnected from the charging circuit and connected in parallel with a 5- Mega ohm resistor. Determine the voltage across the capacitor at t=40s and at t=100s.
For the current-to-voltage converter circuit in given Figure, the parameters are as described in Problem l2.30. If Ri = 10 k Ω, determine the closed loop input resistance Ri f.
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