At a 155 kV substation the PT ratio is 1000:1 and the CT ratio is 1200:5. The potential going into the watt-meter is 155 V. What is the MW indicated when the watt-meter reads 800 watts. (EE Oct 1997)

a. 192 MW

b. 19.2 MW

c. 15.0 MW

d. 150 MW

Draw a circuit diagram with a three-cell battery in series with an open switch, a resistor, an ammeter showing the current flowing from the resistor, and a fuse. Also, draw a voltmeter measuring the potential difference across the source.

In this stage, you will review the physical connections and operation of RS-232.
1. List the name of each signal/pin of a 9-pin RS-232 connector.
2. List the purpose of each signal/pin you listed in (1).
3. Identify the voltages that represent each logic level for all the signals you listed in (1).
4. Describe the sequence of signals asserted when a Data Terminal Equipment (DTE)
wants to send data to a Data Communication Equipment (DCE). Clearly indicate the
direction of each signal.