58) Define Dirty Power and the three causes of it. 21) On a 3" Fresnel or "Inkie" they origionally used single contact bayonet lug lamp bases (BA-15s) but now use dual contact bayonet (BA-15d) bases. Why would a old single contact bayonet lamp in a new double contact lamp base explode, but a double contact lamp in an old single contact base not do anything? 46) What two reasons make it necessary to ground a transformer? 53) What is the difference between a generator/alternator, and dynamo? 55) What is the only equipment which can be installed before the service disconnecting means? 60) What piece of equipment is designed to do the following: 1) during normal operations, not interfere with the circuits they protect, 2) transfer the excess voltage to ground in a surge, not to exceed the voltage rating of the equipment it protects, 3) Clamping speed must be fast enough to prevent damage to the protected equipment, and 4) be capable of withstanding surges without damage to itself. 61) What are the two purposes of grounding? 62) Power relays are required for lighting booths when what condition exists? 63) A small voltage imbalance will produce a proportional or large current imbalance? 64) A simple inductive ballast is what? 70) Which is the proper way (most accurate way) of determining power requirements, A) figure out how many thousands of watts of watts is the total load on the system, and divide by 1,000 than times that figure by 8.3, multiply that figure by 1.2 for safety and divide that figure by 3 for the phases, or B) distribute the load, take total wattage of each leg, divide by 120 to get the amperage, multiply by 1.2 for a safety factor, and round up to the next size service available for the load? 76) The unit of electrical pressure is called the what? 77) The ampere is a unit of electrical what? 79) The drier the area around a grounding rod, the higher or lower the resistance to ground? 80) Over-loaded fuses will have a clear or darkened window? 81) One Hz is the A) amount of time between center of two peaks of current B) the amount of peaks in 60 seconds C) the amount of peaks+valleys in one second D) the amount of time between the centers of one peak and one valley of a wave? 91) Causes of high voltage drop are: excessively long cable runs, poor connections, and what? 103) The resistance of a conductor is directly proportional to its what? 104) The resistance of a conductor is inversely proportional to what? 105) Does temperature affect resistance of conductors, if so, would higher color temperature lamps be higher wattage at the end of their lamp life, or does wattage always stay the same in a lamp in-spite of the age of a lamp? What does this have to do with superconductivity? 107) What is the skin effect, and what does it have to do with voltage loss and capacity? 108) What is the difference in resistance between series and parallel? 109) The total resistance of the combined resistances in this circuit is always less than the resistance of the lowest-value resistor in this circuit. The combined total resistance of a number of unequal resistances in this circuit is equal to the reciprical of the sum of the reciprocals of the individual resistances. What type of circuit is this, Series or Parallel? 110) Voltage drop in this type of circuit equals the sum of the voltage drops of the resistors in the circuit, and thin turn equals the voltage at the supply source. Also the current in this circuit is the same throughout the circuit. What type of circuit is this? 111) Explain the effect of induced emf. 117) What is the difference between electricity and magnetism?