Second Year IEC Final Exam Questions and Answers 100% Pass

Second Year IEC Final Exam Questions and Answers 100% Pass ______ in utility transmission lines reduces the power losses in the transmission conductors. increasing the voltage ______ shall not support luminairs weighing over 6 lb. lampholder _______ surrounds the windings in typical "pole-mounted" transformers. oil 40C = ____ F 104 A .25KVA transformer has a nameplate rating of 240/480 primary volts 120/240 secondary volts. IF rated voltage is applied to the primary the secondary voltage will be _____ than the nameplate secondary voltage because these small transformers have compensation built into their secondaries. Higher/lower higher A 100-gallon water heater is to be installed to supply hot water to the restrooms in an office building. The water heater is rated for 9.8 KW at 240 volts 1- phase. The minimum size THHN/THWN copper wire that can be installed between the required disconnect switch and the water heater is _____ AWG. 6 A 120/240 volt 1 phase 3 wire panelboard is to be fed from a transformer. The minimum calculated size of the transformer is ______ KVA where the following loads are connected. : Circuit 1 : 120-volt lighting that draws 10 amps Circuit 3 : 17 amps of 120-volt lighting Circuit 5-7 : 16 AMP 240 volt swimming pool motor 7.92 A 175- amp breaker protects a feeder that originates in a 277/480-volt, 3-ph, 4 wire service panel in an office building. Which of the following conductors is the smallest size permitted for the feeder ? 2/0 A 20-amp multiwire branch circuit is connected to breakers 1 and 3 in a 120/208 volt 3 phase 4 wire panelboard. _____ if the "hot" from breaker 3 and the neutral are connected to a 2000-watt lighting fixture load. The load will operate normally and the breaker will not trip A 200-amp breaker protects a feeder that originates in a 120/240 volt, 3 ph, 4 wire service panel in a movie theatre. Which of the following THHN/THWN conductors is the smallest size permitted for the feeder ? 3/0 A 240-volt safety switch is fed from a 100 KVA transformer that hs Z= 1.8% on its nameplate. If the tqo 1 phase conductors going to the 240-colt switch are "shorted" together , about ______ amps of current will flow through the transformer winding. The fuses in the safety switch should have an AIC rating of at least this many amps. 23,148 A certain piece of equipment is to be connected with SOO flexible cord. The equipment requires 2 ungrounded and 1 grounded conductors. Whati