Description : A station is known to operate at 60-meters. What is the frequency of the unknown station?
Last Answer : 5 megahertz.
Description : In reference to dB meters, 0 dBm represents 1 milliwatt into what value of load?
Last Answer : 600-ohm load.
Description : What do impedance-angle meters and vector bridges have in common?
Last Answer : Both measure phase angle and magnitude in determining impedance.
Description : What is the advantage of using in-line wattmeters over output power meters?
Last Answer : Most in-line wattmeters are capable of measuring both forward and reflected power.
Description : What are two types of frequency meters?
Last Answer : Vibrating reed and moving disk.
Description : Why is a multimeter preferred over separate meters?
Last Answer : It is much more convenient to have one meter with several functions than several meters each with a single function.
Description : What two types of meters can be used to check a switch?
Last Answer : An ohmmeter and a voltmeter.
Description : What meters operate from their own power sources?
Last Answer : Self-excited.
Description : Which of the meters listed should only be used after a circuit has been electrically disconnected? A. Wattmeter B. Frequency meter C. Ammeter D. Ohmmeter
Last Answer : Answer: D
Description : A resistance in a circuit of unknown value is to be tested using the voltmeter/ammeter method. Therefore, the meters should be connected with _____________. A. both meters in series with the ... parallel with the resistance D. the ammeter in parallel and the voltmeter in series with the resistance
Last Answer : Answer: C
Description : Power (P) in a 3 phase circuit with two watt meters at unity power factor is (W1 & W2 = watt meter readings)
Last Answer : Power (P) in a 3 phase circuit with two watt meters at unity power factor is P = W1 + W2 (W1 & W2 = watt meter readings)
Description : The resistance of a few meters of wire conductor in closed electrical circuit is?
Last Answer : The resistance of a few meters of wire conductor in closed electrical circuit is practically zero.
Description : Which type of splice is used to splice a lighting fixture to a branch circuit?
Last Answer : Fixture joint.
Description : What type circuit is used to produce square or rectangular waves?
Last Answer : Multivibrator.
Description : . What characteristic of an RL circuit allows it to act as an integrator?
Last Answer : The ability of the inductor to oppose a change in current.
Description : What are the requirements for an integration circuit?
Last Answer : The time constant is long and the output is taken across the capacitor in an RC circuit.
Description : If C4 were removed from the circuit, what would happen to the output of the amplifier?
Last Answer : The output would decrease. (C4 decouples R2 preventing degenerative feedback from R2.)
Description : Can a parallel LC circuit be used as the frequency determining network for an rf amplifier?
Last Answer : Yes.
Description : If the output impedance of an amplifier circuit is decreased, what is the effect on the gain?
Last Answer : The gain decreases.
Description : What component in an amplifier circuit tends to limit the low-frequency response of the amplifier?
Last Answer : The coupling capacitor (C3).
Description : What type filter is used to allow a narrow band of frequencies to pass through a circuit and attenuate all other frequencies above or below the desired band?
Last Answer : Bandpass.
Description : What term is used to describe the frequency at which the filter circuit changes from the point of rejecting the unwanted frequencies to the point of passing the desired frequencies?
Last Answer : Frequency cutoff (fco).
Description : What is the band of frequencies called that is included between the two points at which current falls to 70 percent of its maximum value in a resonant circuit?
Last Answer : Bandwidth of the circuit
Description : When is line current minimum in a parallel-LC circuit?
Last Answer : At the resonant frequency.
Description : In a parallel-resonant circuit, what is the relationship between impedance and current?
Last Answer : Maximum impedance, minimum current.
Description : What is the term for the number of times per second that tank circuit energy is either stored in the inductor or capacitor?
Last Answer : Natural frequency or resonant frequency (f r).
Description : When the magnetic field of the inductor is completely collapsed, where is the energy of the tank circuit stored?
Last Answer : . Capacitor.
Description : When the capacitor is completely discharged, where is the energy of the tank circuit stored?
Last Answer : Inductor magnetic field
Description : In a series-RLC circuit, what is the condition of the circuit if there is high impedance, low current, and low reactance voltages
Last Answer : Nonresonant (circuit is either above or below resonance)
Description : . In an "ideal" resonant circuit, what is the relationship between impedance and current?
Last Answer : Impedance low Current high.
Description : In an a.c. circuit that contains both an inductor and a capacitor, what term is used for the difference between the individual reactances?
Last Answer : Resultant reactance.
Description : What is the output current in the common-collector circuit?
Last Answer : IE.
Description : What is the current gain in a common-base circuit called?
Last Answer : Alpha (α).
Description : What method for checking transistors is cumbersome when more than one transistor is bad in a circuit?
Last Answer : The substitution method.
Description : What is the input current in the common-emitter circuit?
Last Answer : Base current (IB).
Description : What must be done to a circuit before you can use an ohmmeter for testing?
Last Answer : It must be de-energized.
Description : Is an ammeter connected in series or in parallel with the circuit under test?
Last Answer : . In series.
Description : When taking a voltage measurement, which lead of the voltmeter should you connect to the circuit first?
Last Answer : Ground.
Description : What tool is used to de-energize capacitors in a circuit that has been disconnected from its power source?
Last Answer : Shorting probe.
Description : What precaution should you take when substituting a synchro tester in a circuit for a transmitter?
Last Answer : Use only one receiver so as not to overload the tester.
Description : What type of indicator is usually placed in the stator circuit of a torque synchro system?
Last Answer : An overload indicator.
Description : How are synchro capacitors connected in a circuit?
Last Answer : They are delta-connected across the stator windings.
Description : What is the most common type of integrated circuit packaging found in military equipment?
Last Answer : DIPs (dual inline packages).
Description : Serial-to-parallel and parallel-to-serial conversions are accomplished by what type of circuit?
Last Answer : Shift register.
Description : What is needed to use a monostable or one-shot multivibrator for a clock circuit?
Last Answer : Triggers.
Description : What is the simplest type of clock circuit?
Last Answer : An astable or free-running multivibrator.
Description : What type of adder is used to handle a carry from a previous circuit?
Last Answer : Full adder.
Description : The area between base 1 and base 2 in a UJT acts as what type of common circuit component?
Last Answer : Variable resistor.
Description : If the permeability of the core of a coil increases, what happens to (a) inductance and (b) true power in the circuit?
Last Answer : (a) Inductance increases; (b) true power decreases.