Description : As shown in the illustration, the circuit has been on the line for several days when component 'E1' burns out. The operator receives an alarm, switches over 'B' to energize the standby ... than required for the circuit therefore limiting the current through the alarm relay which will not pick up
Last Answer : Answer: D
Description : What device sweeps a band of frequencies to determine frequencies and amplitudes of each frequency component?
Last Answer : Spectrum analyzer.
Description : What term describes sounds capable of being heard by the human ear?
Last Answer : Sonics.
Description : What term describes a single object?
Last Answer : Unit
Description : What term describes a material whose resistance remains relatively constant with changes in temperature?
Last Answer : Zero temperature coefficient.
Description : What term describes voltage or emf?
Last Answer : Difference of potential.
Description : What term describes how much of a cycle has been completed?
Last Answer : Phase or phase angle.
Description : The term dispersion describes the process of ∙ A. separating light into its component frequencies ∙ B. reflecting light from a smooth surface ∙ C. the process by which light is absorbed by an uneven rough surface ∙ D. light scattering
Last Answer : A. separating light into its component frequencies
Description : When an SCR is forward biased, what is needed to cause it to conduct?
Last Answer : A gate signal.
Description : Does a rectifier tube conduct on the positive or negative alternation of the input signal?
Last Answer : Positive.
Description : An ac voltage is applied across a diode. The tube will conduct when
Description : Before a diode will conduct, the cathode must be what polarity relative
Last Answer : Negative.
Description : When testing an SCR with an ohmmeter, the SCR will conduct if what two elements are shorted together?
Last Answer : Gate and anode.
Description : A test harness is a A. A high level document describing the principles, approach and major objectives of the organization regarding testing B. A distance set of test activities collected into a manageable phase ... conduct a test D. A set of several test cases for a component or system under test
Last Answer : C. A test environment comprised of stubs and drives needed to conduct a test
Description : Which of these best describes how to conduct an immediate review of a text book section?
Last Answer : spend a few minutes writing down everything you can remember about what you've just read.
Description : What term is used for the ability of a spot on a CRT screen to continue to glow after the electron bean has struck it and moved away?
Last Answer : Persistence.
Description : Which term describes the movement of materials away from a place?
Last Answer : Erosion
Description : The device in figure 'B' shown in the illustration will conduct when the ____________. EL-0067 A. base-emitter is forward biased and the collector-base is reverse biased B. anode-cathode is forward ... is reversed biased D. terminal 1-2 is forward biased and the emitter-terminal 1 is reverse biased
Last Answer : Answer: B
Description : Presynaptic neurons conduct impulses a. toward the synapse b. away from the synapse c. both correct d. both in correct
Last Answer : toward the synapse
Description : What component in a blocking oscillator controls pulse width?
Last Answer : Transformer.
Description : What component is in parallel with the output in a parallel limiter?
Last Answer : The diode.
Description : What component(s) is/are used for low-frequency compensation for Q2?
Last Answer : R9 and C5.
Description : What component(s) is/are used for high-frequency compensation for Q1?
Last Answer : L1, L2, and R5.
Description : What component in an amplifier circuit tends to limit the low-frequency response of the amplifier?
Last Answer : The coupling capacitor (C3).
Description : If current gain is required from an rf amplifier, what type of component should be used as an output coupling element?
Last Answer : A step-down transformer.
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 : Which receiver component converts the IF pulses to video pulses?
Last Answer : Detector.
Description : Which component of the receiver produces the signal that is mixed with the received signal to produce the IF signal?
Last Answer : Local oscillator.
Description : What transmitter component allows the radiation of a large number of discrete frequencies over a wide band?
Last Answer : . Frequency synthesizer.
Description : What radar component permits the use of a single antenna for both transmitting and receiving?
Last Answer : Duplexer.
Description : When you are measuring a component using a bridge, what is the most common cause of inaccurate measurements?
Last Answer : The capacitive and inductive characteristics of the test leads.
Description : In an electron tube regulator, the electron tube replaces what component?
Description : Which fiber optic component (splice, connector, or coupler) makes a permanent connection in a distributed system?
Last Answer : Splice.
Description : Describe an optical fiber cable component (OFCC).
Last Answer : OFCCs are tight-buffer fiber surrounded by arimid yarn and a low-halogen outer jacket.
Description : To perform microminiature component repair, a 2M technician must be currently certified in what area?
Last Answer : Microminiature component repair.
Description : When removing the component, under what circumstances may component leads be clipped?
Last Answer : If the component is known to be defective or if the board may be damaged by normal desoldering.
Description : In what direction are component leads clinched on single and double-sided boards?
Last Answer : In the direction of the run.
Description : How is oxide removed from pads and component leads?
Last Answer : A fine abrasive.
Description : A cylindrical copper block with resonant cavities around the circumference is used as what component of a magnetron?
Last Answer : Anode or plate
Description : The folded waveguide in a bwo serves the same purpose as what component in a twt?
Last Answer : Helix.
Description : What methods are used to prevent unwanted component interaction?
Last Answer : Ground planes, shielding, and component placement.
Description : Microcircuit refers to any component containing what types of elements?
Last Answer : Integrated circuits.
Description : The head driver circuit in a tape recorder’s direct record electronics component (figure 5-1) performs what function?
Last Answer : It takes the signal from the summing network, amplifies it, and sends it to the record head for recording.
Description : The control electronics component of a floppy or hard disk drive performs what three main functions?
Last Answer : a. Spins the disk at the correct speed. b. Moves the heads across the recording surface. c. Tells the write/read heads when to write data and when to read it.
Description : What component is used in a triode amplifier to convert variation in
Last Answer : A plate load resistor RL
Description : What component causes a generator to produce dc voltage rather than ac voltage at its output terminals?
Last Answer : A commutator
Description : What information must be known to determine the component values for a voltage divider?
Last Answer : The source voltage and load requirements (voltage and current).
Description : Which component in figure 3-7 develops the af signal at the input?
Last Answer : R1.
Description : When you are testing individual components in a circuit, what may cause a defective component to appear good?
Last Answer : A parallel resistor or diode of similar value.
Description : What physical component of a galvanometer provides the restoring force for the coil?
Last Answer : Phosphor bronze ribbons.