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175 Cards in this Set
- Front
- Back
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Power in an audio-frequency circuit is stated in which of the following units? |
dB and dBm |
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Applicants to the Naval Academy in addition to other requirements must be scholastically qualified with an acceptable secondary school transcript with college preparatory subjects and grades indicating college capability and a class standing normally in the top what percent in high school? |
40% |
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The blotting paper in a dry cell serves which of the following purposes? |
• Separates the paste from the zinc • Permits the electrolyte from the paste to filter through to the zinc slowly |
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In a cavity wavemeter, moving the plunger farther into the cavity space causes which of the following changes to (a) the cavity size and (b) the resonant frequency of the cavity? |
(a) Increase (b) decrease |
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When reverse bias is applied to the gate lead of a JFET, what happens to (a) source-to-drain resistance of the device and (b) current flow? |
(a) Increases (b) decreases |
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The intensity knob on the spectrum analyzer controls what display function(s)? |
• Brightness of the CRT trace • Brightness of the readout display |
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Maintenance was performed on an item identified by a Work Unit Code. What type of code describes this action? |
Action Taken |
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In the reflection-type, circulator-coupled tunnel-diode amplifier, what component prevents feedback to the tuned input circuit? |
The circulator |
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The sum point in a position servo system combines what two signals to produce an error signal? |
Feedback and input |
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To develop a flowchart, which of the following must you know first? |
What problem you are to solve |
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Who ensures all deck watch stations are manned with qualified personnel and all watch standers in previous watch sections are relieved? |
BMOW |
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The field of research that is developing computer systems which mimic human thought in a specific area and improve performance with experience and operation is what field of research? |
Artificial intelligence |
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Flexible computers that are byte oriented can operate in either a fixed- or variable-word-length mode by which of the following techniques? |
Proper program instructions |
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The result of subtraction is known as the |
difference |
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An ac servo motor would probably be used instead of a dc servo motor in which of the following situations? |
To move light loads at a constant speed |
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The positive and negative output pulses of the astable multivibrator are sent to the indicator for which of the following purposes? |
• To intensify the crt beam • To gate the range-marker generator |
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For a multimode graded-index fiber, the numerical aperture is at its maximum value at which of the following locations? |
At the core-cladding interface |
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Frequency-domain plots are used by technicians to graphically view which of the following waveform parameters? |
Amplitude versus frequency |
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Frequency deviation of an fm signal is usually expressed in which of the following units of measurements? |
Kilohertz |
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An ac directly heated filament has which of the following advantages? |
Rapid heating effect |
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Coaxial lines are more efficient than two-wire lines at microwave frequencies for which of the following reasons? |
Because electromagnetic fields are completely confined in coaxial lines |
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A magnetic shield or screen used to protect a delicate instrument should be made of which of the following materials? |
Soft iron |
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A folded dipole can be used instead of a simple, center-fed dipole for which of the following purposes? |
Matching impedance |
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The LC choke-input filter is used primarily where which of the following types of regulation is/are important? |
Voltage and current |
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In a line-of-sight communications system, propagation is affected by which of the following layers of the atmosphere? |
Troposphere |
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When performing measurements with an oscilloscope, you should ensure that the trace extends across what minimum portion of the vertical viewing area? |
60% |
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In the radio-frequency-carrier shift system, translation of an rf signal to an audio signal is done by which of the following equipment? |
A radio receiver |
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Which of the following types of synchros is used in a system requiring large amounts of power and high accuracy? |
Control |
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When the crank of a 500-volt megger is rotated faster than its designed rate, what maximum output voltage does it produce? |
500 volts |
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What effect does sweep frequency that is higher than the incoming signal frequency have on the displayed signal? |
It produces less than a complete view of the incoming signal |
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What is the major advantage of the telegraph over earlier methods of communication? |
Range |
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Which, if any, of the following problems occur when klystrons are left in storage or not used for more than 6 months? |
They become gassy |
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Which type of training is used to provide physical fitness and nutrition education to commands? |
GMT |
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Operators of transmitters and receivers use a circuit to coordinate the service of messages and to make frequency changes. What is the name of this circuit? |
Order-wire circuit |
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When using a stroboscope to measure an unknown frequency, which, if any, of the following steps should you take? |
Start the measurement at the highest frequency that the stroboscope can deliver and reduce the flashing rate until a single stationary image is obtained |
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The group velocity of a wavefront in a waveguide may be increased by which of the following actions? |
Increasing the frequency of the input energy |
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Which of the following systems provides an inventory of test equipment actually located in the fleet? |
SCLSIS |
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What is the money paid after all deductions and allotments are paid called? |
Net income |
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An additional bit in each storage location called parity bit is used for what purpose? |
To detect errors |
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The use of plastic-clad silica and all plastic fibers has what primarydrawback? |
Limited optical performance |
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If applied to a coil, what voltage waveform will cause a linear rise in current? |
Trapezoidal wave |
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Fundamental symbols are standard for the military, as directed by Department of the Navy Automated Data Systems Documentation Standards, SECNAVINST 5233.1. |
True |
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Enlisted OCS applicants in what paygrades or above are designated as officer candidates in their present paygrades? |
E-5 |
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To overcome the applications software compatibility problem, which of the following is done so the application can be run under several different operating systems? |
Some software comes in several versions |
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What is the primary use of analog computers in the Navy? |
Gun fire control |
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The primary cell is completely discharged when which of the following conditions exists? |
• The cathode is completely eaten away • The active ingredient in the electrolyte is used up • The voltage of the cell is reduced to zero |
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Stability is a problem in which, if any, of the following tunnel-diode frequency converters? |
High-gain converter |
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The coefficient of coupling between two coils is a measure of what factor? |
The magnetic flux ratio linking the coils |
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Which of the following fields is/are present in wave guides? |
E and H fields |
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What is the value of 5 times 100? |
5 |
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An atom is the smallest possible particle that retains the characteristics of which of the following substances? |
An element |
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Normally, the intermediate maintenance organization has a total of how many production divisions? |
Four |
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The control of an output signal by an input signal resulting in the output signal having some (or all) of the characteristics of the input signal is known by which of the following terms? |
Amplification |
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The MOSFET is normally constructed so that it operates in either the depletion mode or the enhancement mode. The depletion mode MOSFET (a) uses what type of bias and (b) has what type of doped channel to cause a depletion of current carriers in the channel? |
(a) Forward (b) heavily |
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A Hay bridge measures unknown inductances by comparing them with which, if any, of the following components? |
A standard capacitor |
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When using an oscilloscope to measure a high voltage, you should use which of the following procedures? |
Use the high voltage probe instead of the normal probe |
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The POSITION control on the spectrum analyzer is used to adjust which of the following CRT display features? |
Vertical and horizontal position |
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On an ohmmeter, which of the following switches allows selection of ac or dc readings? |
FUNCTION |
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Which of the following terms applies to the process that holds the atom together in crystal? |
Covalent bonding
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At what intervals must the air be changed out when working in enclosed spaces while using chlorinated-cleaning solvents? |
3 minutes |
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Radio set control units are often used aboard ship to remotely control transmitters and receivers. Under standard operating conditions what is the maximum number of units that can be paralleled with a single transmitter and receiver group? |
Four |
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In the input of the first video amplifier of a radar receiver, the differentiator circuit performs which of the following functions? |
Ftc |
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What are the two basic components of a galvanometer? |
A stationary permanent magnet and a movable coil |
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Which of the following actions will recharge a secondary cell? |
Connecting the negative terminal of a voltage source to the cathode of the cell and the positive terminal of the voltage source to the anode of the cell |
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What transmission-line loss is caused by magnetic lines of force not returning to the conductor? |
Radiation |
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In some installations tuning must be done without the use of rf power, as rf is suppressed except during brief transmission periods. Under these conditions, which of the following methods of tuning should be used? |
Silent |
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What is the term given to arranging records in a predefined sequence or order? |
Sorting |
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Fourth generation technology has which of the following results for the computer industry? |
Computers that are significantly smaller and lower in cost |
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The CX and CDX differ from the TX and TDX because the CX and CDX have which of the following characteristics? |
Higher impedance windings |
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What age must Surface Warfare Officers (1160) be commissioned by? |
29 |
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Which of the following is/are an advantage of ssb transmission? |
Ssb requires one-sixth of the output power and less than half the bandwidth required by AM to transmit the same amount of intelligence power
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What are practices called that have been established for so long that they now have the force of law? |
Customs |
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A comparator compares signal strength during which of the following types of receiver operation? |
• Space diversity • Frequency diversity |
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What is the first step in performing maintenance on a secondary-cell battery? |
Check the technical manual for information on the specific type of battery |
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The hollow form of nonmagnetic material found in the center of an air core coil has what purpose? |
To support the windings |
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The RCL bridge measures an unknown resistance by balancing the resistance value of the unknown component with that of known components inside the test set. What type of circuit is used in this method of measurement? |
Wheatstone bridge |
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Why is it necessary to electrically isolate a component while testing individual components with the Huntron Tracker 2000? |
A diode in series may give you an inaccurate signature |
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For a gyro to be universally mounted, it MUST have a total of how many gimbals, if any? |
Two |
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Once an SCR is turned on by a positive pulse of current applied to the gate lead, what action turns the SCR off? |
Reducing the collector current to a value below that necessary to maintain conduction |
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The greatest hazard from thermal effects appears to come from equipment operated in which of the following frequency ranges? |
1 to 3 gigahertz |
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Of the following available rf wattmeter power ranges, which one should you select when measuring an unknown power? |
1000 watts |
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Which of the following is a basic difference between an open-loop control system and a closed-loop control system? |
System of feedback |
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What administers medical examinations for Naval Academy applicants? |
DODMERB |
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Online HELP screens serve what purpose? |
Tell the operator how to perform a given function |
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What is the PMA awarded for a Must Promote? |
3.8 |
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When performing measurements above 1 GHz in a flow calorimeter, which of the following dielectrics do you normally use? |
Water |
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What is another name for thermionic emission? |
The Edison effect |
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When you are testing a transistor with a transistor tester, for the reading to have ±15 percent accuracy, the resistance from emitter to base must be what minimum value? |
300 ohms |
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Who ensures U.S. Navy Regulations conform to the current needs of the Department of the Navy? |
CNO |
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The magnetic field surrounding a straight conductor is (a) what shape, and (b) is in what position relative to the conductor? |
(a) Concentric circles (b) Perpendicular |
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The second specific part of the predicate in a computer instruction, known as the operand, in general answers what question? |
Where |
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Oscillations in an echo box are known as ringing. Which of the following conditions cause this ringing? |
A saturated receiver |
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What is the unit of measurement for inductance? |
Henry |
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What does a translucent substance do to light rays that fall on it? |
Reflects and absorbs them |
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When a hydrometer is used to check the specific gravity of the electrolyte in a battery, to what level should the electrolyte be drawn? |
Enough so the float will rise without entering the suction bulb |
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Data is stored on all disks in a number of invisible concentric circles called what? |
Tracks |
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The dimensions of a transmitting antenna are determined by which of the following factors? |
Transmitted frequency |
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What term is used for programs such as assemblers, compilers, operating systems, and applications programs? |
Software |
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Which part of the atom has a negative charge and a small mass? |
Electron |
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Fixed-word-length computers have slower calculating speeds than character-addressable computers. |
False |
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Horizontal half-wave antennas mounted at right angles to each other in the same horizontal plane make up which of the following antennas? |
Turnstile |
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Which of the following units should be used in measuring the amount of turning force of a synchro? |
Ounce-inches |
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What are computers called that combine the functions of both analog and digital? |
Hybrid computers |
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What year was the first Continental Navy squadron put to sea by Esek Hopkins? |
1776 |
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Which of the following terms is used for the decrease in resistance as the temperature of the semiconductor increases? |
Negative temperature coefficient |
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The magnetic field radiated from an antenna is produced by what electrical property? |
Current |
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EPROM can be erased by what method? |
With a burst of ultra-violet light |
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How are records on a track separated? |
By a gap in which no data is recorded |
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Who serves as the primary advisor and subject matter expert to commanders and CMEO Managers as well as provides assistance to other members in the chain of command on EO issues? |
EOA |
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When friction-clutch damping is used in a servo system, the first overshoot of the load may be characterized as |
large |
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You are using a radio set control unit to remotely control 1 of 8 transmitters. Operating knob number 1 on transmitter transfer switchboard number 1 is used to select transmitters 1 through 6. If you want to control transmitter number 7, what switch position must be selected? |
X |
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The peak power of a transmitted rf pulse depends on which of the following factors? |
Amplitude of the modulator pulse |
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When you are using a transmitter transfer switchboard, what is the maximum number of transmitters that may be connected to a single remote control station? |
One |
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A voltmeter with a 10-microampere meter movement has a sensitivity of how many maximum ohms per volt? |
1,000 |
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Which advancement candidates are designated SBE on the basis of their CO/OIC recommendation and their TIR eligibility? |
E8 and E9 |
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Of the following terms, which one describes the period of time required for one earth terminal to yield control of a satellite to another? |
Hand over |
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Inside the All-Weather Coat, Blue lining, ownership markings must be 3 inches below collar seam, and inside on outer shell on manufacturer's tag, how many inches from bottom left front? (Section 3501.1) |
5" |
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What is the physical restraint of a person called? (Page 2-17) |
Confinement |
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Which of the following substances is a good example of a transparent substance? |
Clear glass |
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Which of the following twt characteristics makes it ideal for use as an rf amplifier? |
Low-noise and wide-bandwidth |
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When making base-to-emitter bias voltage checks on a transistor, you should read which of the following voltage ranges? |
5 to 20 microvolts |
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Which of the following terms is used for the vehicle through which a wave travels from point to point? |
Medium |
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What are the major types of aircraft maintenance? |
Rework and upkeep |
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What is the maximum number of channels available when you are using the emergency portable transceiver covered in chapter 5? |
2 |
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The difference in potential across a resistor, created by current through the resistor is an example of which of the following forces? |
Electromotive |
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For shipboard applications, which of the following types of splices isrecommended? |
Rotary |
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The transmission method that uses a single set of start and stop message characters per block of data is which of the following types? |
Synchronous |
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Which awards are considered Letters of Commendation that are signed by flag officers? |
Gold and Silver Wreath |
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Matter can be found in which of the following forms? |
• Solid • Liquid • Gaseous |
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Which digit is the MSD in the binary number 1011001? |
The 1 farthest to the left |
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What type of rotor can be composed of a single winding or three Y-connected windings? |
Drum or wound |
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A material whose resistance remains constant as the temperature increases has what temperature coefficient? |
Zero |
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Capacitance meters can be grouped into which of the following basic categories? |
Bridge-type and reactance-type |
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How many-months are served by Petty Officers with the U.S. Naval Ceremonial Guard Unit Petty officers per tour? |
36 |
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Prior to working on a circuit, you use a shorting probe discharge which of the following types of components? |
Capacitors and cathode-ray tubes |
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What are the inputs to a D flip-flop? |
Data and clock |
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Fusion splicing is not recommended for Navy use for all of the following reasons except which one? |
High level of expertise required for splicer operator |
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In a stowage space aboard ship, what device(s) should be used to hold the test equipment in place? |
Stretch seat-belt-type straps |
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The initial pulse (or spike) at the beginning and at most connections in a link on the OTDR trace is caused by which of the following processes? |
Reflected power at each air gap in the link |
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How does the stator of a TX receive voltage? |
By a magnetic coupling with the rotor |
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The MOSFET has which of the following advantages over the JFET? |
Higher input impedance |
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Who develops the written procedures to ensure that chaplains/religious program specialists execute their suicide prevention program responsibilities throughout the Navy? |
OPNAV, Chief of Chaplains (N097) |
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What type of fiber optic link is the basic building block of all fiber optic systems? |
Point-to-point |
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The initial waves that travel from the source to the load of a transmission line are referred to as what type of waves? |
Incident |
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What are the three types of control synchros? |
CX, CT, CDX |
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In a klystron, the placement of additional cavities between the buncher cavity and catcher cavity increases the power output by causing which of the following electronic actions? |
Increased velocity modulation |
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There are differences between low- and high-power transmitters. The main difference is the high power transmitter contains a larger number of which of the following types of amplifiers? |
Intermediate power |
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How many grids are there in a pentagrid tube? |
Five |
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What is the size of the neckerchief square? |
36" |
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What are the two basic classifications of fiber optic links? |
Digital and analog |
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In a hybrid-ring duplexer, the fields at the entrance of an arm must have what phase relationship to propagate energy down the arm? |
180 degrees |
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Indicator sweep voltage in a radar is normally initiated at which of the following times? |
At the same time as the transmitter trigger |
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Signal generators are equipped with attenuators for which of the following purposes? |
To regulate the output signal level |
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Teletypewriter patch panels perform which of the following functions? |
They provide a central point for connecting the dc supply voltage to the teletypewriter circuits |
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Which letter, with a few exceptions, is used to designate support crafts? |
Y |
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Photocells are used in which of the following circuits? |
Controller |
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Commanding Officers can recommend personnel for a Navy Good Conduct Medal as a reward for how many years of good conduct? |
3 |
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When testing dry cell batteries, which of the following procedures should you follow? |
The battery should be tested under load conditions |
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The filter capacitor in the LC choke input filter is NOT subject to extreme voltage surges because of the protection provided by which of the following components? |
Inductor |
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The range capability of a 3D radar is limited by which of the following characteristics? |
High operating frequency |
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Which type of unasked for behavior is considered by the offended party to be undesirable or offensive in nature? |
Unwelcome behavior |
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The multimode graded-index fiber that has the best bend performance and will show the least amount of optical degradation if mishandled is what size? |
85/125 m |
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Distortion caused by excessive regenerative feedback is called |
parasitic generation |
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Electrically charged particles that affect the propagation of radio waves are found in what atmospheric layer? |
Ionosphere |
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Bridge circuits are used in the measurement of impedance for which of the following reasons? |
• Bridges are only slightly less accurate than vtvm's when measuring impedance
• Bridges are useful in measuring frequency |
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If a current gain is desired, which of the following elements/networks should be used as an output-coupling device? |
A step-down transformer |
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A transmission line is designed to perform which of the following functions? |
Guide electrical energy from point to point |
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Which of the following servicing techniques applies to semiconductors? |
• Substituting a semiconductor with a known good semiconductor is a simple way to test them • Voltage and resistance measurements are taken prior to substituting semiconductors • Substituting semiconductors is cumbersome if more than one is bad or if they are soldered into the circuit |
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All analog computers are what type? |
Special-purpose |
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Which hazard probability category identifies hazards that will probably occur in time? |
B |
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A flexible waveguide is used in short sections because of the power-loss disadvantages. What is the cause of this power loss? |
Walls are not smooth |
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Which reenlistment code indicates personnel are eligible for probationary reenlistment? |
RE-R3 |
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Which of the following terms describes a single resistor that represents a complex circuit? |
Equivalent resistor |
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When a program is so large and complex that it exceeds the memory capacity of a stored-program computer, where is the overflow stored? |
Auxiliary memory |
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The rejection of input frequencies above 900-kilohertz is performed by which of the following circuits? |
A low-pass filter |
