5 1-27.   In the parallel-resonant circuit, which of the following circuit conditions is NOT normal? 1.  X_C equals X_L 2.  I_C equals I_L 3.  I_line is minimum 4.  I_line is maximum Figure 1D.—Parallel-resonant circuit curves. IN ANSWERING QUESTIONS 1-28 AND 1-29, REFER TO FIGURE 1D. 1-28.   In the figure, what does response curve A represent? 1.  Current 2.  Impedance 3.  Reactance 4.  Resistance 1-29.   What does response curve B represent? 1.  Power 2.  Impedance 3.  Reactance 4.  Resistance 1-30.   As a parallel-resonant circuit approaches resonance, which of the following circuit actions takes place? 1.  Impedance decreases 2.  Oscillating current increases 3.  Inductance increases 4.  Capacitance decreases 1-31.   When a parallel-resonant circuit operates BELOW resonance, which of the following component characteristics describes circuit action? 1.  Inductive 2.  Capacitive 3.  Resistive 1-32.   When a parallel-resonant circuit operates ABOVE resonance, which of the following component characteristics describes circuit actions? 1.  Inductive 2.  Capacitive 3.  Resistive 1-33.   In a parallel-resonant circuit, which of the following circuit conditions is observed? 1.  Oscillating current is less than line current 2.  Oscillating current is greater than line current 3.  Line current is maximum 4.  Impedance is minimum 1-34.   What is the level of impedance offered at resonance in (a) a series-resonant circuit and (b) a parallel-resonant circuit? 1.  (a) High (b) high 2.  (a) High (b) low 3.  (a) Low (b) low 4.  (a) Low (b) high 1-35.   The ability of a resonant circuit to separate currents of desired frequencies from those of undesired frequencies makes them useful in which of the following circuit applications? 1.  Filters 2.  Counters 3.  Amplifiers 4.  Voltage dividers