1) A 600-volt to 200-volt transformer would become a 600-volt to __________-volt transformer if the con a) 100 b) 300 c) 1800 d) 1200 2) Apparent power is generally called ______. a) current voltage b) volt amps c) circuit current d) capacitance 3) Assume that an inductor has an inductive reactance of 100 ohms and the wire has a resistance of 10 ohms. What is the impedance? a) 10.5 b) 100.5 c) 110 d) 1000 4) When two parallel feeders are installed to each of the synchronous condensers, the conductors can be sized for _______ the value of the required ampacity. a) half b) one-quarter c) double d) four times 5) Most capacitors used in industry, especially for power factor correction, are called ______ capacitors. a) polarized b) conducting c) DC d) nonpolarized 6) When the power factor of the plant is 1.0 (unity), the kilovarmeter reads ______. a) infinity b) 50 c) 0 d) 100 7) In a three-phase circuit, the apparent power can be computed using this formula: VA = volts times _______ times the square root of three. a) amps b) resistance c) inductance d) capacitance 8) In the precipitator, wires made of which metal give the particles a positive charge? a) aluminum b) palladium c) tungsten d) silver 9) One option for protecting a motor-compressor from overloads and failure to start is to use a time-delay fuse or inverse- time circuit breaker rated at not more than ______ percent of the rated load current. a) 105 b) 95 c) 115 d) 125 10) The cooling system for the drugstore and bakery in the chapter example is a ________ system with the compressor a) joint b) split c) unified d) dual 11) In most instances, the rated load-current (RLA) is at least equal to _____ percent of the hermetic refrigerant motor- compressor’s maximum continuous current (MCC). a) 32.1 b) 16.1 c) 64.1 d) 96.1 12) The evaporator in a commercial installation normally consists of a ________ coil, through which the building air is circulated by a motor-driven fan. a) fan plate b) helical tube c) fin tube d) plate 13) The compressor serves as a pump to draw the expanded refrigerant gas from the evaporator, boosts ______ of the gas, and sends it to the condenser. a) temperature b) volatility c) pressure d) stability

Review for Quiz 2 Class 4

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