ACSO Basic Electronic Warfare Practice Test

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• What is the speed of propagation of electromagnetic energy?
• What factor primarily determines the resolution capability of a radar system?
• What are the primary heat sources of an aircraft?
• "This type of RADAR Absorbent Material (RAM) uses destructive interference" is the definition of which of the following terms?
• Which term best describes Operational Electronic Intelligence (OPELINT)?
• "This is the time immediately following transmission time when the receiver is unable to process returns" is the definition of which of the following terms?
• Which of the following best describes a 'modulated signal'?
• What are the dominant effect and frequency range for a surface wave?
• What input polarization provides the maximum jamming signal strength for a vertically polarized receiving antenna?
• Electronic Warfare (EW) is essentially an effort to control what?
• Which element is crucial for maintaining effective electronic warfare operations?
• Which type of Noise Jamming exhibits wide frequency coverage, high power density, but not continuous coverage when emitting?
• What is one potential function of the LASER Warning Receiver (LWR)?
• The ability of a RADAR system to rapidly tune from one operating frequency to another is the definition of?
• What is the common goal of Electronic Warfare strategies like Jamming, Neutralization, and Deception?
• "One complete positive and one complete negative alternation of a signal" is the definition of which of the following terms?
• "Any unwanted signal accepted or generated by a receiver, which corrupts the wanted signal at the receiver output" is the definition of which of the following terms?
• What EA technique uses noise jamming output related to the scan rate of tracking RADAR?
• Which missile guidance system is most likely the most effective in a cluttered environment?
• What type of guidance does a missile use that relies completely on commands from the launcher?
• The pulse width of RADAR affects which of the following?
• What are two sources of emitted energy from an object?
• In an Automatic Command to Line Of Sight (CLOS), who controls the engagement functions?
• What are the two classifications of a passive Missile Approach Warning System (MAWS)?
• Which type of jamming involves altering transmitter signals to deal with threats effectively?
• Which shape is known to give the greatest RADAR Cross Section (RCS)?
• What are the dominant effect and frequency range for a space wave?
• Which statement about Semi-Active Homing is not true?
• "The distance between flare and aircraft and the overall size of flare's signature" is the definition of which of the following terms?
• What type of missile guidance system is designed to maintain a trajectory based on external commands?
• Which division of Electronic Warfare (EW) aims to deny an adversary the use of electronic systems utilizing the EM spectrum?
• Which type of RADAR may send track ID information directly to the weapon system?
• Intelligence derived from non-communications systems like RADAR and navigation aids is known as?
• What is the advantage of having RADAR with variable polarization?
• Which Defensive Electronic Warning System (DEWS) component sorts RADAR parameters for the purpose of identification and warning?
• What term describes a narrow band jammer set to a given frequency?
• In order to achieve the ultimate fidelity in communications, the respective bandwidth sizes for channel, medium, and signal should be placed in what order?
• Stealth is a passive form of?
• Which scan type updates tracking information every 2 (2 lobes) to 4 (4 lobes) pulses?
• This type of RADAR Absorbent Material (RAM) functions similarly to a resistor in an electrical circuit. What is this term?
• Which term describes the reduction of signal strength as it travels through a medium?
• What type of scan has the RADAR antenna without any scanning motion?
• What is the primary objective of Electronic Neutralization?
• Which object is theoretically able to completely absorb all incident radiation and emit all that absorbed energy?
• The equivalent of the transmitter power distributed over the Pulse Repetition Interval (PRI) is defined as which term?
• Which method would be used to protect systems from desensitization effects in Electronic Warfare?
• A pyrotechnic flare has which one of the following characteristics?
• What are the operating modes of a Countermeasure Dispensing System (CMDS)?
• Which of the following is NOT a major class of laser?
• What component of the Defensive Electronic Warfare System (DEWS) detects emissions from a missile after launch?
• The ability of RADAR to separate two targets close in azimuth at approximately the same range is defined as which term?
• What is one function of Electronic Protection (EP) in military operations?
• Which term refers to intelligence concerning foreign technological developments applicable for military purposes?
• Which of the following is a primary focus of Air Defence systems?
• What does LASER stand for?
• Which electronic warfare function involves the use of electromagnetic energy to reduce or prevent enemy use of the spectrum?
• Difference between the highest and lowest frequencies of a signal is the definition of which of the following terms?
• What polarization has the E-field of the EM wave orthogonal to the E-field of its reference EM wave?
• What are the two general types of infrared detectors?
• Which division of Electronic Warfare (EW) focuses on protecting friendly forces from enemy electronic attack efforts?
• What type of polarization provides the maximum signal strength for a vertically polarized receiving antenna?
• In Electronic Warfare, which of the following is considered a more aggressive measure?
• What describes the combined effects of spreading, absorption, and scattering causing a reduction in energy intensity of an EM wave?
• Which communication Electronic Protection (EP) spreads the transmitted intelligence over a very wide frequency band?
• Which parameter affects the minimum distance that a target may be accurately displayed?
• What do Range Gate Pull Off and Velocity Gate Pull Off utilize to "capture" the attention of the target RADAR?
• What are the two fundamental classes of flares?
• What two effects are responsible for the attenuation of infrared radiation as it passes through the earth's atmosphere?
• Which of the following is a consideration in the structure of an Air Defence System?
• What system(s) can a LASER dazzle weapon be used against?
• Which type of coupling results from energy entering a system through ventilation holes or gaps?
• What is typically used to measure the duration of emitted radar pulses?
• "The greatest range targets will return from before the next pulse is transmitted" is the definition of which of the following terms?
• Which of the following is not an advantage of digital communications over analogue?
• Which component is typically responsible for collecting and analyzing electromagnetic signals?
• Ground Positioning System (GPS), Inertial Navigation Systems (INS), and Terrain Comparison (TERCOM) are examples of what type of guidance method?
• Change in direction and velocity of a wave front due to its passing from one medium into another of differing density describes which propagation effect?
• What is the primary goal of Electronic Warfare?
• What is a major advantage of using semi-automatic CLOS in missile guidance?
• Propagating Electro-Optic energy in the far infrared portion of the spectrum is dominated by _____ while the visible spectrum is dominated by _____.
• What polarization has an E-field radiated at a 45 degree angle to the earth's surface?
• What input polarization provides the maximum jamming signal strength for a horizontally polarized receiving antenna?
• Which term refers to the required level of "faithfulness" in received signals?
• Which term describes forms of radiant energy?
• What equipment is primarily used to determine the direction and location of a signal?
• Effective change of frequency of a received signal due to the relative velocity of transmitter with respect to a receiver describes which propagation effect?
• What is the primary objective of Electronic Jamming?
• "Intelligence derived from electromagnetic non-communication systems by other than the intended recipients or users" defines which term?
• Which term describes detectable measures such as altering transmitter parameters for effective EM spectrum use?
• The action of radiating or altering EM energy to confuse or distract an enemy is known as?
• Which RADAR Electronic Protection (EP) technique helps prevent a RADAR receiver from being saturated by jamming?
• What type of polarization does an electromagnetic (EM) wave have when the electric field component is rotating in a counter-clockwise sense?
• Which property of a LASER indicates that it emits energy at one specific frequency?
• The ratio of the Pulse Width (PW) to Pulse Repetition Interval (PRI) expressed in percent is referred to as which term?
• Which scan type is produced by phased array RADAR and is characterized by a lack of identifiable characteristics?
• This type of RADAR Absorbent Material (RAM) slows down RADAR energy and absorbs it as thermal energy. Which term describes it?
• What is the physical entity that supports the transmission of communications signals from one point to another?
• What defines the deliberate use of EM energy to impair the effectiveness of electronic devices?
• In terms of Electronic Warfare, what does the term 'Active' typically refer to?
• What does the term Electronic Attack (EA) refer to in electronic warfare?
• Which of the following types of LASER is primarily used for research purposes?
• Which Missile seeker response requires the seeker to know the target's relative movement?
• Which system is primarily used for navigation in air defense contexts?
• What aspect of Electronic Warfare focuses on protecting friendly forces against enemy electronic attacks?
• What are the two most important facts in reducing RADAR Cross Section (RCS)?
• Which term describes the deliberate use of EM energy to damage enemy devices relying on the EM spectrum?
• What does Electronic Warfare Support (ES) primarily involve?
• What type of guidance does a weapon system use to acquire and close to terminal intercept on a target?
• What are the three fundamental components of an Electro-Optical (EO) system?
• How are Pulse Repetition Interval (PRI) and Pulse Repetition Frequency (PRF) related?
• What is the term for a communication medium that requires a physical connection?
• In Electronic Warfare, what does the term "Electronic Protection" refer to?
• Which basic noise jamming technique spreads jamming power over a wide frequency band for continuous coverage?
• In which Command to Line of Sight (CLOS) method does the operator track the target while the computer tracks the missile?
• "This is the time between the end of one transmitted pulse and the beginning of the next pulse" is the definition of which of the following terms?
• What is the definition of Military action to exploit the EM spectrum including the search for, intercept, and identification of EM emissions?
• Which IR seeker response assumes the flare will have a larger IR signature than the target?
• What is true about Electronic Warfare Support (ES) and Signals Intelligence (SIGINT)?
• This type of RADAR Absorbent Material (RAM) is made of tiny ferromagnetic particles suspended in polymer resin. What is it called?
• Which type of Noise Jamming exhibits wide frequency coverage, lower power density, and continuous coverage when emitting?
• What polarization has a rotating E-field?
• Which homing type has an operator tracking the target while a computer tracks the missile?
• What polarization has the E-field rotating in a clockwise direction?
• Which division of Electronic Warfare (EW) allows us to understand when someone is using the EM spectrum and react quickly?
• What are the two main sources of external/environmental noise?
• Which statement describes Beamwidth?
• What division of EW involves the use of electromagnetic energy or directed energy to degrade enemy combat capability?
• What are the dominant effect and frequency range for a sky wave?
• Detection and Identification are what component of an ADS?
• Which type of tracking RADAR has no detectable scan rate, uses 1 RF beam, and can only track one target at a time?
• What are the two types of passive Missile Approach Warning System (MAWS)?
• What are the two types of a Missile Approach Warning System (MAWS)?
• Which of the following is not considered a threat to an Air Defence commander?
• Which term refers to undetectable measures in operating procedures to ensure the friendly use of the EM spectrum?
• Which of the following is a Scan on Receive Only technique?
• What is the term for the amount of time required for one complete cycle of an electromagnetic wave?
• What is the most common flow of an ADS from initial detection to destroying the target?
• How long is chaff cut to optimize its performance?
• The time to complete one cycle of antenna motion is described as which term?
• Which type of homing involves a missile that contains a power source and illuminator beaming energy at a target?
• What defines the term "search radar"?
• What is the primary objective of Electronic Deception?
• What type of guidance combines two or more techniques into one missile?
• Which of the following is not a system EP technique?
• What concept describes the capability to control and exploit the electromagnetic spectrum?
• What does Smart Noise do to make Electronic Jamming effective against Direct Threat RADAR?
• What is defined as any unwanted signal that corrupts the wanted signal at the receiver output?
• What does the contraction of RADAR stand for?
• Which of the following would not be a passive form of Target Surveillance and Identification?
• Select the correct definition of a grey body radiator?
• What is the purpose of the detector element in an EO system?
• "Measure of strength or intensity. Maximum displacement from the zero line position of a signal" describes which of the following terms?
• Which component would typically provide a warning when a missile is approaching?
• Which type of Electronic Warfare aims at misleading enemy systems by sending false data?
• Which of the following is the oldest and still most widely used RADAR Countermeasure?
• What three sections makeup the Electro-Optics (EO) portion of the Electromagnetic (EM) spectrum?
• Which of the following is/are a consideration in the structure of an Air Defence System?
• Which two properties are of less importance in determining RADAR cross-section (RCS)?
• Which parameter determines Maximum Unambiguous Range (MUR)?
• What term describes the concept of moving electrons to an excited energy state and encouraging decay through a collision with a photon?
• What atmospheric effect causes scintillation?
• Which term describes the ability of RADAR to separate two targets close in range at the same azimuth?
• Which scan type uses one frequency beam transmitting and receiving in four lobes simultaneously?
• What term defines any equipment that enhances an aircraft's ability to detect, locate, identify, avoid, or defeat direct threats?
• Which system is primarily responsible for detecting and identifying approaching missiles?
• What parameter is used to determine range resolution in a RADAR system?
• What term refers to a band of frequencies used for a particular purpose?
• "That degree of dominance in the air battle which allows freedom of operations" is defined as what?
• Which communications obstacle may be minimized by increasing the strength of the information signal or by using highly directional antennas?
• What technique deliberately spreads the transmitted intelligence over a very wide frequency band?
• Which of the following desired characteristics may be most ensured by using equipment redundancy and transmission diversity?
• Which EA technique transmits a deception signal based on the RADAR scan period to induce false correction signals in the angle tracking circuitry?
• Which of the following is not considered an Information Operations (IO) discipline?
• This applies to activities including threat detection, location, warning, emitter avoidance, and target acquisition?
• What type of jamming is employed to prevent RADAR tracking by manipulating the return signal?
• What component of a Forward Looking Infrared (FLIR) system is used to cool the detector element to the required temperature?
• Which communications obstacle may be minimized by physically cooling the equipment?
• What are small devices jettisoned from an aircraft capable of emitting Electronic Deception signals?
• What is the primary frequency range and dominant propagation effect for surface waves?
• The degree of accuracy to which RADAR can measure azimuth is defined as which term?
• What two active electronic devices are used to accurately recreate, modify, and transmit Electronic Deception signals?
• The path made in space by a point on the RADAR beam is defined as which term?
• What main roles do Electro-Optical (EO) systems play within the military?
• Hertz, or cycles per second, is the basic unit of which of the following characteristics?
• Actions taken to prevent an enemy's effective use of the EM spectrum are defined as what?
• Which of the following describes a characteristic of an Electro-Optic system?
• "Orientation of the E-field with respect to the earth's surface" describes which of the following terms?
• Two in-phase EM waves arriving at the same point via different paths describes which of the following terms?
• "The measure of an object's ability to absorb and radiate energy" is the definition of which of the following terms?
• Which atmospheric phenomenon specifically affects a LASER but not commonly other Electro-Optical sources?
• Which of the following is NOT a type of Missile Approach Warning System (MAWS)?
• Which type of RADAR Absorbent Material (RAM) reduces RCS by attacking the magnetic field of incoming RADAR energy?
• Which of the following describes the frequency of a LASER?
• What term describes intelligence derived from electromagnetic communications systems by non-intended recipients?
• This type of RADAR Absorbent Material (RAM) reduces the RADAR return by attacking the magnetic portion of the Electromagnetic (EM) wave. What is it called?
• What type of technology helps improve the accuracy of Missile guidance systems?
• What is the purpose of using a higher frequency in radar systems?
• Which of the following systems is characterized by being Monochromatic, Coherent, Highly Directional, and High Intensity?
• What does CFSAS Annual Enrollment provide?
• Which component of the Defensive Electronic Warfare System (DEWS) dispenses chaff, flares, and possibly active Radio Frequency (RF) decoys?
• What is the ultimate goal of Electronic Attack (EA)?
• Where is the unwanted infrared energy typically filtered in an infrared system?
• Which type of antenna is typically used for Height Finding (HF)?
• What is the main goal of Electronic Protection (EP) in electromagnetic warfare?
• "Length of a full wave cycle. Distance from a point on a wave to the next same point on the wave" describes which of the following terms?
• What is known as the degree of air superiority wherein the air force cannot effectively interfere with air assets?
• In the context of radar systems, what does frequency agility enhance?
• Which EP characteristic enhances resistance to enemy Electronic Attack (EA) in Air Defence Systems (ADS)?
• What infrared law shows the radiated power over the whole spectrum for a given temperature?
• Which of the following is an example of a system Electronic Protection (EP)?
• "Amount of time taken by one complete cycle" is the definition of which of the following terms?
• What is the purpose of the detector component of an Electro-Optic system?
• What technique is used to manipulate the frequency and amplitude of noise signals in Electronic Jamming?
• "Intelligence required for the planning and conduct of campaigns at the operational level" is the definition of which term?
• Which of the following technologies is used for mitigating the effects of jamming?
• Which three divisions comprise Electronic Warfare (EW)?
• Which target will emit more overall energy (i.e., energy over all wavelengths)?
• What is Point Defence designed to protect?
• Sidelobe Cancellation (SLC) is effective against which type of jamming?
• Which scan type is used in the search and acquisition mode of RADAR on fighter/interceptor aircraft, sweeping back and forth in front of the aircraft?
• Which term describes the capability of a radar system to distinguish between two closely spaced targets?
• What does the term LASER stand for?
• What polarization has an E-field radiating parallel to the earth's surface?
• Which component is essential for creating high-fidelity Electronic Deception signals?
• What part of ADS allows the other components to be integrated?
• Which type of tube is most commonly used in a Low Light Level Television (LLLTV) device?
• What is the term for the shortest range a target may be accurately detected by pulsed RADAR?
• What technique would be effective against CHAFF?
• Which of the following describes the concept of "jamming" in electronic warfare?
• Which system is designed specifically to counteract adversary air and missile threats?
• Which LASER application is NOT in use for military operations?
• Which type of Noise Jamming exhibits narrow frequency coverage, high power density, and continuous coverage when emitting?
• What type of radar uses reflected energy from the target for tracking?
• Which type of signal is typically unaffected by noise?
• Which component of DEWS senses direct or scattered LASER energy from a range finder or weapon?
• The angle in degrees between the half power points of an antenna radiation pattern is referred to as which term?
• Which definition describes the Electronic Warfare Support (ES) function?
• Which scan type employs a horizontally truncated paraboloid sweeping a beam around a full circle with steady elevation?
• A UV Missile Approach Warning System (MAWS) should be able to detect which of the following missiles during the boost phase?
• The degree of accuracy which RADAR can measure elevation is defined as which of the following terms?
• "The time from the end of recovery time to the beginning of the next pulse" is the definition of which of the following terms?
• Which technique transmits a coded, long duration, high energy pulse?
• The following devices are listed in which order: electro-optic devices, microwave RADAR, and VHF radio communications?
• Bouncing of EM waves off an object with a density different than that of the propagating medium describes which propagation effect?
• Stealth is a passive form of?
• This is the only form of energy usable for transmissions in short-distance metallic wires?
• Which term defines a safety protocol to manage emissions of a friendly system in Electronic Warfare?
• Which scan type is produced by moving a feed horn of a parabolic antenna in a tight circle about the center of the stationary dish?
• Which term describes the transfer of information in one direction only?
• "The maximum power output during transmission time" is the definition of which of the following terms?
• In an infrared missile, where is the modulation done in order to track the target?
• The division of EW that involves actions tasked by an operational commander to locate sources of electromagnetic energy is defined as which of the following?
• At what speed do photons travel?
• The time elapsing in microseconds between the start of one pulse and the start of the next is known as which term?
• Which weapon system relies on the natural energy emitted from its target?
• Which scan type sweeps through a sector in only one direction?
• "This is the shortest distance that a target may be accurately displayed" is the definition of which of the following terms?
• "Bending of EM waves around an object or barrier" describes what propagation effect?
• What are the two classifications of Missile Approach Warning Systems (MAWS)?
• What is the primary target of airborne Electronic Warfare (EW)?
• "All measures designed to nullify or reduce the effectiveness of hostile air actions" defines which term?
• What is the definition of the main information, communication, and operations centre for air defence?
• Which aspect of communication systems is concerned with the clarity of the transmitted message?
• "The generic term used to describe Communications Intelligence (COMINT) and Electronic Intelligence (ELINT) when there is no requirement to differentiate between these two types of intelligence" is the definition of which term?
• Which term refers to the division of Electronic Warfare (EW) that aims to protect personnel and equipment from the degrading effects of EW?
• Which component of DEWS identifies threats by sorting RADAR parameters?
• What are the two classifications of an active Missile Approach Warning System (MAWS)?
• Which type of material or system performs similarly to resonant RADAR Absorbent Material (RAM) using a transmitter?
• The ability of RADAR to separate two targets close in range at approximately the same azimuth is defined as which term?
• Which system has the highest frequency?
• Which of the following is not a characteristic of Early Warning RADAR?
• What does RADAR stand for?
• Which statement is FALSE regarding a Line of Sight Beam Rider (LOSBR) missile?
• What type of antenna produces a pencil beam and is often used in tracking RADAR?
• The measurement of time that the transmitter is on during each cycle describes which term?
• This RADAR type is often used in applications where range measurement is not a factor?
• What type of radar is often used in active Missile Approach Warning Systems (MAWS)?
• What ADS weapon system is the most flexible and also the most expensive to operate?
• Which are some of the more commonly used IR switch techniques?
• What must an Infrared (IR) flare mimic to simulate an aircraft?
• What formula is used to determine the range to a target?
• "The degree of accuracy to which RADAR can measure range" is the definition of which of the following terms?
• Which of the following Electronic Neutralization techniques may cause mechanical damage from intense heat and expanding plasma?
• "That degree of air superiority where opposing forces can't effectively interfere with air assets" is known as?