15 2-33.   When using the AN/USM-465 portable service processor, which of the following procedures is possible? 1.   Identifying faulty components on digital printed circuit boards 2.   Troubleshooting its own printed circuit boards 3.   When using the guided probe, it will tell you if you have placed the probe on the wrong test point 4.   All of the above 2-34.   Which of the following measurements add resistance and inductive and capacitive reactance? 1.   Q 2.   Resonance 3.   Impedance 4.   Figure of merit 2-35.   Bridge circuits are used in the measurement of impedance for which of the following reasons? 1.   Bridges are one of the most accurate devices for measuring impedance 2.   Bridges are only slightly less accurate than vtvm's when measuring impedance 3.   Bridges are useful in measuring frequency 4.   Both 2 and 3 above 2-36.   Bridge circuits typically contain which of the following sections? 1.   A measuring circuit and comparing circuit 2.   A detector circuit 3.   A power circuit 4.   All of the above 2-37.   When approximate values for resistance, capacitance, or inductance to be measured by a bridge are unknown, which, if any, of the following actions should you take? 1.   Connect two bridges in parallel to make the measurement 2.   Assign a temporary value to the component and set up the bridge accordingly 3.   Place an adjustable shunt across the meter terminals 4.   None of the above 2-38.   The most serious errors affecting the accuracy of bridge measurements can be attributed to which of the following problems? 1.   The capacitive and inductive characteristics of the connecting leads 2.   The resistance of the test leads 3.   D'Arsonval meter movements used as detectors 4.   Improper selection of meter shunts 2-39.   Which of the following considerations should be given when applying external excitation to a bridge circuit? 1.   The voltage applied should equal the maximum voltage rating of the component under test 2.   The higher the voltage, the more accurate the measurement 3.   Apply only enough voltage to obtain a reliable indicator deflection 4.   External excitation should be limited to 115 v 60 Hz