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RF amplifiers used in television receivers usually require a bandwidth of what?
6 MHz
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Which term that describes the size of a signal?
Amplitude
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Which type of device enables an input signal to control an output signal?
Amplifier
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An audio amplifier is designed to amplify frequencies between 15 Hz and what?
20 kHz
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Which operating class is the amplifier if the amplifying device is biased in such a way that current flows in the device for 51% - 99% of the input signal?
Class AB
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What is the process known as of transferring energy between circuits?
Coupling
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What is the most commonly used coupling in amplifiers?
RC Coupling
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What is accomplished by adding part of the output signal in phase with the input signal?
Positive feedback
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What is caused by a small part of the signal from the amplifier output being sent back to the input of the amplifier?
Oscillation
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Which type of device produces two signals that differ in phase from each other from a single input signal?
Phase splitter
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What is the process of sending part of the output signal of an amplifier back to the input of the amplifier called?
Feedback
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What is accomplished by adding part of the output signal out of phase with the input signal?
Negative feedback
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An audio amplifier has been described as an amplifier with a frequency response from 15 Hz to what?
20 kHz
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Which standard block diagram symbol is used for an amplifier?
Triangle
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Which two ways can most amplifiers be classified?
Function or Frequency response
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What is an amplifier in which the output signal voltage is larger than the input signal voltage?
Voltage amplifier
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To meet military specifications, all standard synchros must be capable of continuous operation for 1,000 hours at how many revolutions per minute (rpm) without a load?
1,200
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What is an amplifier in which the output signal power is greater than the input signal power?
Power amplifier
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A video amplifier is an amplifier designed to amplify a band of frequencies from 10 Hz to what
6 MHz
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Which name is given to a variety of rotary, electromechanical, position-sensing devices?
Synchro
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Which type of simple system should the synchro capacitor never be used in?
Transmitter-receiver
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The advent of long-range missiles and high-speed aircraft has brought about the need for accurately transmitting very large quantities. This is best done by what type of synchro system?
Tri-speed
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Which signal lights are used to aid maintenance personnel in locating synchro trouble quickly?
Trouble indicators
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Audio amplifier, RF amplifier, along with what else are the three broad categories of frequency response for amplifiers?
Video amplifier
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RF amplifiers are designed to amplify frequencies between 10 kHz and what?
100,000 MHz
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How many classes of operation for an amplifier are there?
4
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Which type of amplifier has the worst fidelity?
Class C
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Low-speed prestandard synchros must be capable of continuous operation for 1,500 hours at what RPM without a load?
1,200
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How many symbols meet the standard military specifications for schematic diagrams of synchros and synchro connections?
5
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Synchros used in shipboard equipment are designed predominately for how many volts?
115
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Prestandard synchros operate in a range of −13º F to what temperature?
185º F
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When stator voltages are measured, reference is always made to what voltages instead of to a single coil's voltage?
Terminal-to-terminal
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Which class of amplifier has the characteristics of good fidelity and low efficiency?
Class A
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For the AC voltmeter method of zeroing a synchro to be as accurate as possible, an electronic or precision voltmeter having 0- to 250-volt and a 0- to 5-volt ranges should be used. On the low scale this meter should also be able to measure voltages as low as what?
0.1 volt
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Which method is used in synchro receivers to prevent the rotor from oscillating or spinning?
Damping
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How many conditions must exist for a control transformer (CT) to be on electrical zero?
2
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Synchro torque receivers, commonly called synchro receivers, are electrically identical to torque transmitters of the same size except for the addition of some form of what?
Damping
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Which term means that the output signal is just like the input signal in all respects except amplitude?
Fidelity
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Which unit of measurement are torque synchro measurements in?
Ounce-inches
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Synchros are used primarily for the rapid and accurate transmission of what between equipment and stations?
Information
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What is the measurement of work?
Foot-pounds
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How many volts do most aircraft synchros operate on?
26
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What is the most widely used frequency for airborne equipment?
400 Hz
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What is any undesired change in a signal from input to output?
Distortion
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What is a control synchro device accurately governing some type of power amplifying device used for moving heavy equipment?
Control transformer
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Which type of synchros are used in systems that are designed to move heavy loads such as gun directors, radar antennas, and missile launchers?
Control
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Which part of a synchro is a cylindrical structure of slotted laminations on which three Y-connected coils are wound with their axes 120º apart?
Stator
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Which type of amplifier uses two transistors whose output signals are added together to provide a larger gain (usually a power gain) than a single transistor could provide?
Push-pull
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What are the two types of damping methods?
Electrical and Mechanical
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What is a measure of how much load a machine can turn?
Torque
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Standard synchros are designed to withstand surrounding temperatures ranging from −67º F to what at the terminal board?
+257º F
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Which type of transmitter converts the angular position of its rotor (mechanical input) into an electrical output signal?
Synchro torque
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What are the two common types of synchro rotors in use?
Salient-pole and Drum/Wound
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The strength of the magnetic field produced by what determines the torque?
Stator
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What is the angle called through which a transmitter rotor is mechanically rotated?
Signal
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Data that covers a wide range of values are handled very effectively and still maintain a high degree of accuracy in what type of synchro system?
Multispeed
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When a symbol is used on a schematic, it will be accompanied by the military abbreviation of one of how many synchro functional classifications?
8
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Military standard and Navy prestandard synchros are designed to operate on either 115 volts or how many volts?
26
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What is perhaps tile fastest method of zeroing synchros?
Electrical lock
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When large amounts of power and a higher degree of accuracy are required, as in the movement of heavy radar antennas and gun turrets, torque synchro systems give way to the use of what type of synchros?
Control
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What is the reference point for alignment of all synchro units?
Electrical Zero
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What are used primarily for quickly locating a defective synchro?
Synchro testers
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What is a low voltage used in multispeed synchro systems that contain CTs to prevent false synchronizations?
Stickoff voltage
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Which two broad categories can the synchros used in the Navy be grouped into?
Military standard and Prestandard Navy
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Which principle does a synchro run on?
Electromagnetic induction
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What are the two general classifications of synchro systems?
Torque and Control
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Which frequency are syncrhos designed to operate on?
60 or 400 Hz
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Low-speed prestandard synchros must be capable of continuous operation for how many hours at 300 rpm without a load?
500
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The turns ratios in synchros may vary widely, depending upon design and application, but there is commonly a stepdown of what between the rotor and a single coil?
2.2:1
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Which condition exists when both transmitter and receiver rotors in a synchro system are on zero or displaced from zero by the same angle?
Correspondence
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What is necessary to determine the actual position of the synchros rotor?
Labeling
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Which Control Transformer (CT) windings are considered to be the primary windings?
Stator
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What is the most accurate method of zeroing a synchro?
AC voltmeter
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Which rotary electromechanical devices provide outputs that are trigonometric functions of their inputs?
Resolvers
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Generally, there are how many major categories of trouble occurring in synchro systems?
2
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How many basic rules should be applied to synchro maintenance?
2
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How many important factors must be considered to obtain maximum accuracy in a torque system consisting of one transmitter and one receiver?
2
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In a torque system where either a TX or TDX drives several receivers, the accuracy with which each receiver follows the position-data signal applied to its stators is determined by how many factors?
3
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How many sizes of MIL-S-20708 synchros is the clamping disc assembly made for?
5
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What amplifies signals received and then retransmits them back to earth?
Repeater
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What can be used to amplify electrical signals?
Repeaters
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Which equipment is used for taking bearings on objects outside the ship?
Gyro repeaters
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What is the direction of an object from the observer, measured clockwise from the ship's heading as indicated by the lubber's line in the binnacle or the gyro repeater?
Relative bearing
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What is used in conjunction with the ship control console which includes the rudder angle order indicator-transmitter, helm angle indicator, ship's course indicator, course-to-steer indicator, magnetic compass repeater, and emergency steering switch?
Steering control console
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The purpose of a radar indicator (repeater) is to analyze radar system echo return video and to display that information at various remote locations. How many specific inputs from the radar selected must the repeater have to present correct target position data?
3
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