Two technicians are describing how an air-conditioning system gets rid of the heat. Technician A says that heat always flows from the hotter to the colder object. Technician B says that as a refrigerant evaporates, it absorbs heat as it changes from a liquid to a gas. Who is correct?
A. Technician B only
B. Technician A only
C. Both Technicians A and B
D. Neither Technician A nor B
Answer: B. Technician A only
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The portion of masonry work that extends from the window frame to the face of the masonry wall is known as the _____ .
A. reveal B. veneer C. foundation D. frame plate
Name an example of a non-linear amplifier output
A) A square wave B) An output signal from a electric guitar C) A sinusoidal waveform D) An amplified audio signal
It is critical to _____ from the system before performing any maintenance on any component
A) purge contaminants B) increase pressure C) remove the parts D) relieve all pressure
A generator bus (slack bus) supplies a 100 MW, 50 Mvar load through a lossless transmission line with parameters on 100 MVA base below. Also, there is a 10 Mvar shunt capacitor at the load bus.
A generator bus (slack bus) supplies a 100 MW, 50 Mvar load through a lossless transmission line with parameters on 100 MVA base below. Also, there is a 10 Mvar shunt capacitor at the load bus.
1. Determine the bus admittance matrix (Ybus) for the system.
10 Mvar = 0.1 p.u.
Assuming 1 pu bus voltage 
2. Calculate the voltage magnitude and angle at the load bus using the Newton-Rapson method. Use the flat-start. Provide the values after 2 iterations. General power balance equations are given below.
